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Varicocele & Sport: Can Lifting, Running or Cycling Make It Worse (or Better)?
Exercise and varicocele — what makes it worse, what does not, and how to train smart without affecting your fertility. A urologist's guide for active people.
I am a urological surgeon specialising in reproductive health. I regularly see people worried about how their varicocele (enlarged veins in the scrotum, similar to varicose veins in the leg) affects their active lifestyle. Perhaps you have noticed a dull ache after lifting weights. Or you wonder whether running is making things worse. Maybe you have questions about fertility. These are all reasonable concerns. Knowing how varicocele and exercise are linked helps you make better decisions. This guide explains what the evidence says.
This guide is designed for active people. It covers those who compete in sport, go to the gym regularly, run at weekends, or simply value staying fit. It builds on the main varicocele information with a focused look at sport-specific considerations, backed by the latest clinical evidence.
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what typically triggers ache:
Heavy lifting while holding your breath — this raises pressure inside your abdomen and can worsen symptoms
Long cycling sessions (saddle pressure + heat)
High-impact volume (lots of pounding + fatigue)
Know When to Test
Medical Evidence
European Association of Urology. Guidelines on Male Infertility. 2024
Source:UROWEB.ORG
Practice Committee of ASRM. Report on varicocele and infertility: a committee opinion. Fertil Steril. 2020;114(6):1135-1142
PIF TICK accredited information
The Patient Information Forum is the UK membership organisation and network for people working in health information and support. The PIF TICK is the UK-wide Quality Mark for Health Information.
Author —Published —Last update 20 January 2026Next review 20 January 2027Version —
This content has been produced for educational purposes and reflects current evidence-based practice. Although GGO Med Ltd is a private urology service, all patient information is compiled with the aim of being accurate, evidence-based, and free from commercial bias. If you feel this content does not meet that standard, we would welcome your feedback — please contact us here.
when ultrasound / semen analysis adds value
You’re actively trying (or planning) for pregnancy
You have noticed that one testicle looks or feels different — smaller or softer than before
Symptoms are persistent or worsening despite support
A plan you can actually follow
Here is what we will decide together:
When monitoring is sensible
When training modifications are enough
When to discuss embolisation (blocking the vein without open surgery) vs surgery around your training cycle
What Happens During The Appointment
Review symptoms (ache or heaviness, training triggers, fertility goals)
Examination and grading (including a standing and Valsalva manoeuvre (bearing down to make varicoceles visible) — where appropriate)
Decide what you actually need: scrotal ultrasound (a painless scan of the scrotum), semen analysis, or reassurance and monitoring
Clear plan: training changes, symptom control, and if needed a discussion of embolisation (blocking the vein without open surgery) vs microsurgical repair (an operation using a microscope to repair the varicocele)
Recent Update: NICE and Varicocele for Fertility
In September 2025, a draft for the 2026 guidelines showed that NICE is planning to change its policy on varicocele treatment for people with fertility problems. For years, the UK was the only country where official guidance specifically went against this treatment. This change has been debated for a long time.
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Why Varicocele Makes Itself Felt During Sport
A varicocele often causes no symptoms at all. Many people only notice it once they become more physically active. The link between exercise and varicocele symptoms is not a coincidence. It reflects how blood flows through the veins that drain the testicle.
Is varicocele caused by sport?
Some types of physical activity involve significant effort or straining. During these, pressure inside the abdomen increases. This pressure directly affects how blood drains from the veins that drain the testicle back towards the heart. In a varicocele, the vein valves are already faulty. This extra pressure causes more blood to pool in the enlarged veins. That pooling creates the heaviness, pulling sensation, or ache that many active people describe.
The key point is that sport does not typically create a varicocele where none existed before. Physical activity can unmask or make more noticeable a varicocele that was already present, perhaps without causing symptoms. This distinction matters. It means staying active has not caused the problem. But it does mean being thoughtful about how you manage symptoms while continuing to enjoy exercise.
The Valsalva Manoeuvre and Its Effects
When you lift something heavy, hold your breath, or strain, you naturally perform the Valsalva manoeuvre (bearing down to make varicoceles visible). This involves closing the gap between the vocal cords while trying to breathe out. It dramatically increases pressure in the chest and abdomen.
This pressure surge has several effects on the veins. It temporarily slows blood returning to the heart. It causes swelling of veins throughout the body. It also increases pressure in the veins around the testicle. In someone with a varicocele — where the one-way valves in the vein that drains the testicle are already failing — more blood flows backward. It pools in the network of veins around the testicle.
Why the Left Side Is Most Affected
Varicoceles almost always occur on the left side (approximately 85–90% of cases). This is due to anatomy. The vein that drains the left testicle joins the kidney vein at a right angle. This creates greater resistance to flow. On the right side, drainage goes more directly into the main vein returning blood to the heart. During exercise, this anatomical disadvantage becomes more pronounced.
Temperature Effects
Physical activity also raises scrotal temperature. This happens through body heat and through clothing and movement. The testes need to be 2–4°C cooler than core body temperature to work well. Varicoceles already impair the body's natural cooling system for the testicles. Exercise adds further heat stress. This has implications for both comfort and, potentially, for fertility in people who train intensively.
Concerned about your symptoms?
Book a consultation to discuss how your training and varicocele can be managed together. Appointments are available in person or virtually — please check the booking page for current options and fees.
Does Exercise Make Varicocele Worse?
This is one of the most common questions I am asked in clinic. The honest, evidence-based answer is nuanced. For most people, regular moderate exercise does not make a varicocele worse or create new ones. However, the type and intensity of exercise do matter — especially for people who already have a varicocele, and particularly when fertility is a concern.
What science says about it
A landmark longitudinal study by Zampieri and colleagues followed adolescent boys over three years and found that those with a subclinical (very small) varicocele who engaged in regular sports (three or more times per week) had a significantly higher rate of progression to a clinical (palpable) varicocele than their less active peers—36% versus 5%. Importantly, however, sports participation did not significantly increase the development of new varicoceles in boys who had no baseline venous reflux. In other words, vigorous activity appears to unmask or accelerate existing varicoceles rather than causing them from scratch.
Common Myths About Exercise and Varicocele
myths vs facts
Common Myths About Exercise and Varicocele ✗
Fact
Varicoceles develop due to faulty valves in the veins around the testicle, often with a genetic component.
Heavy lifting does not create varicoceles. But it can make an existing one more noticeable. It does this by increasing pressure in the veins during effort. Research shows that people without any backward blood flow in the veins develop new varicoceles at roughly the same rate as non-athletes. The apparent connection often arises because people notice symptoms during exercise. But the underlying condition was likely already present.
Fact
Most people with varicocele can and should continue exercising. Moderate physical activity is beneficial for overall health. It does not typically worsen outcomes. Some modifications may help manage symptoms.
The benefits of regular exercise for heart and circulation health, mental wellbeing, and how the body uses energy far outweigh the theoretical concerns about varicocele progression in most cases. The key is understanding which activities may need modification and listening to your body.
Fact
Pain is only one consideration. Varicoceles can affect testicular function and fertility even when painless. People concerned about future fertility should consider assessment regardless of symptoms.
The impact on sperm production can occur silently over time. This is particularly true with intensive training that combines mechanical stress with increased scrotal temperature. A painless varicocele in an active person may still warrant monitoring, especially if fertility is a priority.
Fact
Both activities affect varicocele through different mechanisms, and which is "worse" depends on the individual. Running involves impact; cycling involves heat and saddle pressure. Neither is universally more problematic.
The truth is more nuanced. Running creates repetitive jarring and may cause mechanical discomfort. Cycling involves prolonged seated position, pressure in the area between the legs, and increased scrotal temperature. Different people find different activities more or less tolerable depending on their specific varicocele characteristics.
Key Studies on Exercise and Varicocele Progression
Several studies have examined the relationship between physical activity and varicocele, providing useful clinical guidance:
The Zampieri Longitudinal Study (2011): This three-year study of adolescent boys found that regular sports participation (≥3 times/week) was associated with a significantly higher rate of a varicocele too small to feel progressing to one large enough to feel (36% vs 5%). However, sports did not increase the development of entirely new varicoceles in boys without baseline backward blood flow in the veins.
The Rigano Study: Found that overall varicocele prevalence was not higher in athletes than non-athletes. But athletes with longer weekly training durations (7–12 hours/week) showed higher prevalence and severity. This suggests a relationship related to how much training is done.
The Aldhafery Survey (2019): Examining 382 athletes in Saudi Arabia, found varicocele prevalence of 46% among screened individuals—higher than the general population rate of approximately 15%. Interestingly, all men with grade 3 varicoceles were training 5 days per week.
Clinical Interpretation
The evidence suggests that moderate exercise does not cause varicoceles. But very high training volumes and intensities may accelerate the progression of existing varicoceles too small to feel. If you train at high intensity and have a known or suspected varicocele, closer monitoring may be warranted. If fertility is a current priority, adjusting training load during the conception period may be beneficial.
Get a Personalised Assessment
Every athlete's situation is different. A specialist consultation includes clinical examination, ultrasound review, and tailored advice for your training goals.
Gym and Weightlifting
Weight training is the activity most often linked to varicocele symptoms. When you lift heavy weights, pressure inside your belly rises sharply. This directly affects how blood drains away from the testicles.
Varicocele and Gym: a combo everyone talks about
If you lift weights regularly and have a varicocele, you may notice symptoms during maximal efforts. More commonly, they appear in the hours after your session. As pressure builds during the lift, blood pools in the already enlarged veins. Once the session ends and you are upright and moving normally, that pooled blood takes time to drain. This leaves you with that familiar ache or heaviness.
This does not mean you need to abandon resistance training entirely. Many people with varicocele continue to train effectively with some thoughtful modifications. The goal is to reduce unnecessary pressure spikes while maintaining the stimulus your muscles need to adapt and grow.
Why Heavy Lifting Affects Varicocele
During heavy lifts, most people instinctively hold their breath and brace their core — the Valsalva manoeuvre. This is important for spinal stability and force production. But it creates enormous pressure inside the abdomen. Studies have measured pressure inside the abdomen during heavy squats and deadlifts reaching 150–200 mmHg or more — several times higher than resting levels.
This pressure wave travels through the veins. In someone with healthy vein valves, this is largely managed. In someone with varicocele, where valves are already faulty, this pressure travels directly to the veins around the testicle. It causes further stretching and blood pooling.
Exercises Most Likely to Trigger Symptoms
Deadlifts — Particularly conventional deadlifts with heavy loads. The starting position and the requirement for sustained bracing make this particularly challenging.
Squats — Both back and front squats, especially when working at high percentages of your maximum. The depth and load combine to create significant pressure.
Heavy rows — Bent-over rows and other pulling movements from a hinged position.
Leg press — Despite being a machine movement, the angle and loading can create substantial abdominal pressure.
Practical Modifications
Consider these evidence-informed strategies if weight training triggers your symptoms:
Breathing technique: Rather than holding your breath throughout the entire rep, practice exhaling through the sticking point of the lift. This requires practice but can significantly reduce peak pressures while maintaining adequate core stability.
Rep range adjustment: Working in moderate rep ranges (8-12 reps) at correspondingly lower weights typically generates less peak pressure than very heavy singles or triples, while still providing effective training stimulus.
Exercise selection: Machine-based alternatives often allow similar muscle targeting with less requirement for extreme bracing. For example, leg extensions and hamstring curls instead of heavy leg press, or chest-supported rows instead of bent-over rows.
Rest intervals: Longer rest between sets allows symptoms to settle before the next effort. If you're used to 60-90 second rests, try extending to 2-3 minutes on your heavier compound movements.
Scrotal support: Wearing compression shorts or supportive underwear during training can reduce the mechanical pulling sensation many people experience.
A Note on Bodybuilding and Varicocele Prevalence
Some older literature has reported very high varicocele rates (60–80%) among competitive bodybuilders. While these figures may reflect results because only certain people were included in the study, they highlight that chronic heavy training with sustained Valsalva effort does appear to be associated with higher varicocele prevalence and severity. If you train at competitive bodybuilding levels and have fertility concerns, earlier intervention on your varicocele may be worth considering.
Running and Endurance Sports
Running affects a varicocele differently from weight training. Instead of sudden pressure spikes, endurance activities create steady, repeated stresses that build up over time. They also raise scrotal temperature during long efforts.
If you run and have a varicocele, you may notice symptoms are worse towards the end of longer runs, or in the hours after your session. Each foot strike sends a small jolt through the body. Over thousands of steps, this can cause discomfort. The friction and heat from movement also raises scrotal temperature — which matters for fertility.
The good news is that running does not usually cause the extreme pressure spikes that heavy lifting does. Many runners find they can keep training with small adjustments. But for those running at high volumes or with fertility concerns, understanding the build-up of effects over time is important.
The Impact Loading Effect
Each foot strike during running generates the force the ground pushes back with — typically equivalent to 2–3 times your body weight. This force travels through your skeleton and soft tissues. For someone with a varicocele, this creates a repeated jarring effect on the veins around the testicle. Each step is a small mechanical insult. Over the course of a 10km run (approximately 6,000–8,000 foot strikes), these insults accumulate.
This explains why many runners with varicocele notice symptoms more during the second half of longer runs. The cumulative effect of thousands of impacts eventually overwhelms the body's compensatory mechanisms.
Temperature Considerations
Running generates significant body heat, and the scrotal area is not exempt. Studies have shown that scrotal temperature rises during endurance exercise, and this rise is sustained for as long as activity continues. For runners training for an hour or more, this chronic heat exposure can be relevant:
The testes require temperatures 2–4°C below core body temperature for optimal sperm production
Varicocele already impairs the body's natural cooling system for the testicles
Prolonged running adds an additional thermal stress on top of this baseline impairment
This cumulative thermal effect has more relevance for fertility than for immediate symptoms, but it's worth understanding if you're a high-volume runner with fertility concerns.
Practical Approaches for Runners
Supportive underwear: Compression shorts or running-specific supportive underwear can reduce mechanical oscillation and the "pulling" sensation many runners describe.
Hydration: Good hydration helps maintain optimal blood viscosity and venous return. Dehydration thickens blood and may impede drainage.
Terrain variety: Trail running or grass surfaces reduce impact compared to concrete, potentially lessening cumulative mechanical stress.
Volume management: If symptoms are problematic, consider whether your training volume could be reduced without significant impact on your goals. Many runners find they can maintain fitness with slightly fewer weekly miles.
Post-run recovery: Elevating legs after runs, cool showers, and allowing adequate recovery between sessions can help manage symptoms.
Marathon and Ultra-Endurance Considerations
For those training at very high volumes—marathon preparation or ultra-endurance events—the cumulative effects become more significant. Research on endurance athletes has shown transient drops in sperm count and motility after intensive training periods, with recovery typically occurring within days to weeks of reduced training. If you're preparing for a major event and also trying to conceive, timing your training cycles and conception attempts may be worth discussing with your specialist.
Cycling
Cycling creates a mix of problems for people with a varicocele. You sit for a long time. The saddle presses on the area between your legs. And the temperature around your testicles rises and stays high. For these reasons, cycling deserves special thought — not to put you off riding, but to help you make smart choices about equipment and technique.
Unlike running or weight training, cycling affects a varicocele in several ways at once. The position squeezes blood vessels and nerves in the pelvic area. The saddle presses directly on the area between your legs. And the combination of padded shorts, body heat, and poor airflow means scrotal temperature can rise a lot during longer rides.
Saddle Pressure and Venous Congestion
The cycling position — particularly on road bikes with aggressive geometry — places significant weight on the area between the legs. This area contains blood vessels and nerves that can be compressed during riding. For someone with varicocele, this compression may impede venous drainage from the testicular region, potentially worsening blood pooling in the veins.
This explains why some cyclists notice varicocele symptoms are different from those experienced in other sports: less of the acute "pulling" sensation, more of a gradual congestion or heaviness that develops over the course of longer rides.
The Heat Factor
Cycling may be the sport with the greatest potential for sustained scrotal temperature elevation:
Padded cycling shorts, while necessary for comfort, trap heat against the body
The seated position keeps the scrotum close to the body and the saddle
Unlike running, there's less natural ventilation from leg movement
Longer rides (2+ hours) mean prolonged exposure
Research has documented significant scrotal temperature increases during cycling. For men with varicocele—where the normal testicular cooling mechanism is already impaired—this additional heat load can be particularly relevant for fertility considerations.
Practical Strategies for Cyclists
Saddle selection: Consider saddles with cut-outs or channels designed to relieve pressure in the area between the legs. Many modern saddles are designed with this in mind, and finding the right one can significantly improve comfort.
Bike fit: A professional bike fit can optimise your position to reduce pressure on sensitive areas. Even small adjustments to saddle height, angle, and position can make a meaningful difference.
Standing intervals: Getting out of the saddle regularly during rides allows blood flow to return to normal and provides relief from sustained pressure.
Shorts choice: While padding is necessary, some cycling shorts are better ventilated than others. Consider mesh panels or lighter-weight options for warmer conditions.
Post-ride recovery: Allow time after rides before showering; a cool-down period helps scrotal temperature return to normal. Avoid immediately sitting in a car or continuing to compress the area.
A Positive Note: Horizontal Positioning
It's worth noting that cycling has one advantage over running: when you're on the bike, your body is more horizontal than when standing. This actually reduces the gravitational pooling effect on the varicocele. Some cyclists find that despite the heat and pressure issues, their varicocele is actually less symptomatic during riding than during running. Individual responses vary considerably.
Indoor cycling (turbo trainers, spin bikes) tends to create more scrotal heat than outdoor riding due to the absence of airflow. If you train extensively indoors and have fertility concerns, consider adding a fan directed at your lower body, taking regular breaks, and wearing lighter-weight shorts than you might outdoors.
Hyrox and Hybrid Fitness Competitions
Hybrid endurance and strength events like Hyrox combine continuous running with repeated high-effort tasks (sled push and pull, wall balls, farmers' carries, lunges). This creates a pattern that is very relevant for people with a varicocele.
Sharp pressure surges inside the abdomen during strength stations — similar to the Valsalva-induced pressure patterns shown to worsen backward blood flow in the cord that carries blood vessels to the testicle.
Sustained running heat load, which increases scrotal temperature and can magnify the fertility impact of an existing varicocele.
Repetitive impact and high weekly training volume, echoing athlete profiles in which varicocele progression and more pronounced seminal abnormalities have been documented.
Hyrox does not cause a varicocele in people with healthy vein valves. But in those with known or varicocele too small to feel, this type of training can:
Unmask previously silent symptoms
Worsen post-exercise aching or heaviness
Accelerate progression from subclinical to clinical varicocele in high-volume athletes
Compound fertility effects, especially in men training >5 days/week or combining endurance + heavy strength work
Practical recommendations for Hyrox athletes
Use supportive compression shorts during training and racing to reduce venous pooling.
Avoid prolonged maximal Valsalva during heavy stations; practise controlled exhalation under load.
Consider modulating training blocks when trying to conceive, as both varicocele and intense endurance-strength training can impact sperm parameters.
Seek assessment if training consistently triggers aching, heaviness, or marked asymmetry.
Hyrox is compatible with a healthy lifestyle. But people with known varicocele — or fertility plans — benefit from tailored management and periodic review.
Understanding Pain After Exercise
One of the most typical features of varicocele discomfort is its timing. Many people tell me they feel fine during their workout. Then they notice symptoms building in the hours afterwards. Understanding why this happens can help you manage symptoms more effectively. It can also help you recognise what is normal versus what might need attention.
The delay happens because of how blood pools in the veins. During exercise, your muscles and raised heart rate keep blood moving. Once you stop — when you are upright and still — pooled blood in the enlarged veins becomes most noticeable. Gravity now acts unopposed. The blood that built up during exercise takes time to drain away.
Typical Symptom Progression
The classic pattern of varicocele symptoms after exercise follows a fairly predictable course:
During exercise: May be asymptomatic, or may notice mild discomfort with specific movements (particularly heavy lifting or maximal efforts)
Immediately after: Symptoms begin to emerge as you cool down and return to normal activities
1-3 hours post-exercise: Peak symptom intensity often occurs in this window—the characteristic dull ache, heaviness, or pulling sensation
Evening: Symptoms typically persist or may worsen further if you've been on your feet
Next morning: Symptoms usually resolve substantially after lying flat overnight
What Research Shows About Pain Intensity
A clinical study by Ebiloglu and colleagues measured the relationship between exercise and varicocele pain. Among people with painful varicoceles, continuous physical activity caused mean pain scores to spike from approximately 3/10 at baseline to 7.5/10 post-exertion. This confirms what many people experience — that exercise significantly amplifies varicocele discomfort.
Importantly, the same study showed that surgical treatment (varicocelectomy (surgical repair of the varicocele)) was highly effective at resolving this exercise-induced pain. Microsurgical repair provided essentially complete relief in most cases.
Strategies for Managing Post-Exercise Symptoms
Cool shower or bath: Cooling the scrotal area helps with narrowing of blood vessels and symptom relief. Avoid hot showers immediately post-exercise.
Elevation: Lying down with legs elevated for 10-15 minutes after exercise allows drainage and reduces symptoms.
Supportive underwear: Continuing to wear supportive compression shorts in the hours after exercise can help.
Timing awareness: Plan activities requiring you to be on your feet for extended periods (standing events, long meetings) for days when you haven't trained heavily.
When to Stop Training and Seek Assessment
Seek Urgent Medical Attention
Sudden, severe testicular pain (this could mean torsion — a medical emergency)
Nausea or vomiting with testicular pain
Testicle looks higher than usual or rotated
Rapid swelling, especially if painful
Pain with fever or urinary symptoms
Continue Training (With Awareness)
A gradual, dull ache that gets better with rest
Symptoms that follow the usual post-exercise pattern
Discomfort that goes away overnight
Heaviness without sharp or severe pain
Symptoms that match what you have had before
Zampieri N, Dall'Agnola A. Subclinical varicocele and sports: a longitudinal study. Urology. 2011;77(5):1199-1202.
Di Luigi L, et al. Physical activity as a possible aggravating factor for athletes with varicocele: impact on the semen profile. Hum Reprod. 2001;16(6):1180-1184.
Ebiloglu T, et al. The effect of physical activity on varicocele pain and resolution of this pain by different varicocelectomy techniques. Can J Urol. 2016;23(3):8285-8290.
Aldhafery BF, et al. Prevalence and awareness of varicocele among athletes in Riyadh, Saudi Arabia. Res Rep Urol. 2019;11:231-238.
Oranges F, et al. The Influence of an Intense Training Regime in Professional and Non-Professional Athletes on Semen Parameters: A Systematic Review. J Clin Med. 2025;14(1):201.
Radojević N, et al. Restricting sports activity in reducing the rate of varicocele and related infertility parameters in athletes. Arch Med Sci. 2015;11(1):169-173.
Practice Committee of the American Society for Reproductive Medicine. Report on varicocele and infertility: a committee opinion. Fertil Steril. 2020;114(6):1135-1142.
NICE Clinical Knowledge Summaries: Male Infertility. Updated 2024.
Fertility Considerations for Athletes
For men who are active and also worried about current or future fertility, the link between varicocele, exercise, and reproductive health deserves careful thought. The evidence suggests that intensive training may make the negative effects of varicocele on sperm worse — but also that these effects are often reversible with the right treatment.
Varicocele is the most common correctable cause of male infertility (difficulty having children). It affects around 40% of men who come forward with primary infertility. In athletes, the situation may be more complex. The combination of mechanical stress, heat, and oxidative stress (damage from intense training) can make the impact of varicocele on sperm production worse than either factor alone.
The "Double Hit" Effect
Research by Di Luigi and colleagues showed that athletes with a varicocele had significantly worse sperm results (motility and morphology — how sperm move and look) than non-active men with the same varicocele grade. The effect was not simply added together — intense exercise appeared to multiply the negative impact of varicocele on reproductive function. This suggests that very active men with a varicocele may face a compounded fertility risk.
Heat, Oxidative Stress, and Sperm DNA Fragmentation
Three interconnected mechanisms explain how exercise and varicocele combine to affect fertility:
Thermal stress: Sperm production is very sensitive to temperature. The testes evolved to sit outside the body specifically because they require temperatures 2–4°C below core body temperature to work well. Varicocele impairs the body's natural cooling system for the testicles. Intensive exercise — particularly endurance sports and cycling — adds an additional heat load. The combination can create sustained periods of elevated testicular temperature. This impairs sperm production and quality.
Oxidative stress: Intense exercise generates harmful molecules called free radicals throughout the body. This is a byproduct of high energy use. While the body has natural defences against free radicals, these can be overwhelmed during very heavy training. Varicocele independently causes damage from harmful molecules in the testicular environment through low oxygen levels and blood pooling in the veins. People with varicocele who train intensively may therefore experience a 'double hit' of damage to their sperm.
Sperm DNA fragmentation: Both heat and damage from harmful molecules can damage sperm DNA. A high DNA damage score is associated with reduced natural conception rates and poorer IVF or ICSI (fertility treatments) outcomes. Research has shown that varicocele repair can reduce damage to sperm DNA, suggesting this mechanism is treatable.
What the Studies Show
The Di Luigi Study: This pivotal research compared four groups: athletes and non-athletes, with and without varicocele. Key findings:
Athletes with varicocele had lower progressive sperm motility than non-athletes with varicocele
Morphologically normal sperm percentage was approximately 34% in athletes with varicocele versus 42% in non-athletes with varicocele
Only the athletic varicocele group showed significant testicular volume discrepancy (shrinkage of the left testicle) — a marker of varicocele-induced testicular damage
Importantly, resting hormone levels were similar across groups, suggesting local testicular effects rather than systemic hormonal disturbance
The Radojević Study: Adolescent athletes with varicocele who stopped sports for six months showed:
Significant improvements in sperm concentration and motility
Complete resolution of varicocele in 18 out of 49 athletes
One-grade improvement in varicocele in a further 19 athletes
This study provides particularly valuable evidence that training-related varicocele effects can be at least partially reversible.
Clinical Implications for Active Men
For athletes with varicocele who are concerned about fertility, several evidence-based strategies emerge:
Earlier consideration of varicocele repair: Given the compounded effect of intense training on varicocele-related fertility impairment, proactive treatment may be particularly beneficial in very active men.
Training load modification during conception attempts: Temporarily reducing training intensity and volume while trying to conceive may improve sperm parameters. This is a time-limited intervention that need not permanently affect your athletic goals.
Heat management: Specific attention to scrotal cooling—avoiding hot baths, using cooling strategies during indoor training, choosing lighter shorts—may help protect sperm production.
Antioxidant consideration: While the evidence for antioxidant supplements is mixed, some specialists recommend them for active men with varicocele and fertility concerns. Discuss this with your treating physician.
Semen analysis monitoring: Regular semen analysis (every 6-12 months) allows tracking of any changes and informs decisions about timing of intervention.
The NICE Guidelines Shift
It is worth noting that NICE has recently produced a draft for their new guidelines 2026 with an important update. In its guidance, NICE acknowledges a role for varicocele repair in people with abnormal semen parameters and a varicocele large enough to feel. This represents a significant shift from previous, more conservative guidance. It reflects growing recognition that varicocele treatment can meaningfully improve fertility outcomes. For people with varicocele and fertility concerns, this supports earlier discussion of treatment options.
Knowledge check
Which factor does NOT typically contribute to reduced fertility in athletes with varicocele?
Knowledge check
Research suggests that when athletes with varicocele stop intensive training for six months:
Fertility Concerns?
Semen analysis and fertility assessment available as part of your consultation. Let's discuss your options while you continue training.
Sports Impact Index
Not all sports affect a varicocele in the same way. The guide below gives a general idea of how different activities tend to affect symptoms and fertility. Remember that everyone responds differently — some men cope well with activities others find difficult.
Did you know?
Interestingly, research suggests swimming may actually be protective against varicocele development and progression. A study comparing water-polo players to other athletes found that the aquatic group had a lower incidence of varicocele (approximately 9%) than even the non-athlete control group (approximately 12%).
Why Swimming May Be Beneficial
Horizontal positioning: Swimming reduces gravitational pooling in the scrotal veins
Water cooling: Immersion in water (especially cooler water) keeps scrotal temperature low
No Valsalva strain: Swimming involves minimal breath-holding under strain compared to weight training
Hydrostatic pressure: Water pressure may actually assist venous return
For men with varicocele who want to maintain high fitness levels while minimising symptom aggravation, swimming can be an excellent option. Many patients report that it's one of the few vigorous activities that doesn't worsen their symptoms—and some find it actually provides relief.1
When to Seek Specialist Assessment
While many people with varicocele successfully manage their symptoms alongside an active lifestyle, there are circumstances where specialist assessment becomes particularly valuable. As a urologist with a focus on male reproductive health, I see patients across a spectrum — from those seeking reassurance that their approach is sound, to those requiring intervention to protect their fertility or quality of life.
Assessment is particularly worthwhile when symptoms begin to interfere with training enjoyment or consistency, when fertility is a current or future priority, or when you've noticed changes that concern you. A specialist consultation typically involves clinical examination, ultrasound imaging, and—where relevant—semen analysis, providing a complete picture of your individual situation.
When to Seek Specialist Assessment
Many people with a varicocele manage their symptoms well alongside an active lifestyle. But there are times when seeing a specialist is particularly worthwhile. As a urologist with a focus on male reproductive health, I see patients across a wide range — from those who just want reassurance, to those who need treatment to protect their fertility or quality of life.
A specialist assessment is especially useful when symptoms start to affect your training, when fertility is a current or future priority, or when you have noticed changes that concern you. A consultation usually includes a physical examination, an ultrasound scan, and — where relevant — a semen analysis. Together, these give a full picture of your individual situation.
Not sure if your symptoms warrant assessment?
Many athletes I see weren't sure either. A consultation clarifies whether you need intervention or can continue training with modifications — and gives you a clear plan either way.
Return to Sport After Varicocele Treatment
For athletes who have varicocele repair — whether microsurgical varicocelectomy (an operation using a microscope to repair the varicocele) or embolisation (blocking the vein without open surgery) — a key question is how quickly and safely they can return to training. The good news is that modern techniques allow a fairly quick recovery. Most people are back to full activity within four to six weeks.
The recovery timeline depends on the procedure used and the intensity of sport you plan to return to. What follows is a general guide. Your surgeon's specific instructions should always come first, as they are tailored to your individual procedure and circumstances.
Plan your surgery around your competition calendar
Detailed Recovery Guidance
Microsurgical Varicocelectomy Recovery
Microsurgical varicocelectomy (an operation using a microscope to repair the varicocele) involves a small cut in the groin. The enlarged veins are carefully tied off under magnification. Recovery is generally straightforward:
Mild scrotal swelling and discomfort usually settles within days
The wound heals over 10 to 14 days; stitches are usually dissolvable
Most patients can return to desk work within a week
Full recovery for sport is usually reached by 4 to 6 weeks
Embolisation Recovery
Varicocele embolisation is carried out by a specialist doctor who performs procedures using imaging guidance. They reach the vein that drains the testicle through a small puncture in the neck or groin. Recovery is often faster than surgery:
No groin cut means less discomfort at first
Many patients return to light activity within days
Light exercise is often allowed within 1 to 2 weeks
Full return to sport may be possible by 3 to 4 weeks
However, embolisation has a slightly higher chance of the varicocele coming back compared to microsurgical repair in some studies. Your surgeon can advise on the best procedure for your situation.
Sport-Specific Considerations
Weightlifting: The exercises most affected by varicocele — heavy compound lifts with breath-holding — should be the last to come back into your programme. Start with machines and lighter weights. Build up over 2 to 3 weeks once you are cleared for full training.
Running: You can usually start jogging again by weeks 3 to 4, and normal running by weeks 5 to 6. The impact may cause mild awareness of the surgical area at first. This usually settles quickly.
Cycling: Once wounds are fully healed (usually by week 3), you can start cycling again. Begin with shorter rides and make sure the saddle is comfortable before returning to longer distances.
Contact sports: Wait until 6 weeks, or until your surgeon says it is safe. Wearing a protective cup is a good idea for the first few months after you return.
What to Expect After Recovery
Most athletes find that the exercise-related symptoms they had before surgery are greatly reduced or completely gone after varicocelectomy (surgical repair of the varicocele). In the Ebiloglu study, microsurgical repair gave almost complete pain relief (mean VAS scores below 1/10) in most patients. This means you can often train more effectively after treatment, without varicocele discomfort holding you back.
For fertility, improvements in sperm results usually become visible around 3 months after the operation. This reflects the full sperm production cycle. A follow-up semen analysis at 3 to 6 months allows you to see whether things have improved.
Practical Strategies for Training with Varicocele
Whether you are waiting for treatment, have chosen to manage things conservatively, or simply want to train as comfortably as possible, the following evidence-informed strategies can help you keep enjoying physical activity with a varicocele.
Key Principles
Support: Reducing mechanical stress on the varicocele
Technique: Minimising unnecessary pressure during exertion
Cooling: Managing scrotal temperature, particularly for fertility
Recovery: Optimising drainage after exercise
Awareness: Recognising what's normal and what warrants attention
Supportive Underwear and Compression
Appropriate support can significantly reduce the mechanical 'pulling' sensation many people experience during exercise:
Compression shorts: Purpose-designed athletic compression shorts provide support without being restrictive. Look for quality materials with adequate elasticity.
Jockstrap: Traditional athletic supporters remain an effective option, particularly for high-impact activities or when extra support is needed.
Running shorts with liner: Built-in brief liners provide some support; consider layering with compression shorts for longer runs if symptoms are problematic.
Avoid loose underwear during exercise: Standard boxers provide minimal support and allow the varicocele to move freely—not ideal during physical activity.
Breathing and Technique for Weight Training
Practice controlled exhale: Rather than holding your breath throughout heavy lifts, practise exhaling through the sticking point. This takes practice but can meaningfully reduce peak pressure inside the abdomen.
Avoid prolonged breath-holds: Multiple reps without breathing creates sustained pressure. Breathe between reps.
Consider a belt strategically: Weight belts can actually increase pressure inside the abdomen (that is partly their purpose). Consider whether you truly need one, or whether it is worsening symptoms.
Exercise selection: Where possible, substitute exercises that require less extreme bracing. Machines often allow similar targeting with reduced pressure demands.
Temperature Management (Particularly for Fertility)
Avoid hot baths/saunas post-exercise: A cool or lukewarm shower is preferable. Hot immersion adds thermal stress when the testes are already warmed from exercise.
Indoor training considerations: Add a fan directed at your lower body during indoor cycling or gym sessions. The absence of outdoor airflow means heat accumulates more rapidly.
Clothing choice: Looser, lighter-weight shorts may be preferable to heavily padded or tight options, particularly in warm conditions. Balance support needs with ventilation.
Post-exercise cooling: Allow time in a cool environment after training before showering or sitting. This helps scrotal temperature return to normal.
Post-Exercise Recovery Strategies
Elevation: Lying down with legs elevated for 10-15 minutes after exercise promotes venous drainage and can reduce post-exercise symptoms.
Cool shower: Cooling the scrotal area helps with vasoconstriction and symptom relief.
Gentle movement: Complete immobility after exercise can actually worsen venous pooling. Light walking in the hours after training helps maintain circulation.
Adequate rest days: If symptoms are significant, ensure you're allowing adequate recovery between sessions. Chronic accumulated stress may be worse than any single session.
Training Programme Adjustments
Volume vs intensity: If symptoms are problematic, consider whether you can achieve your goals with slightly lower intensity and higher volume, reducing peak pressure demands.
Exercise order: Front-loading your most challenging exercises when you're fresh, rather than leaving heavy compounds until you're fatigued, may reduce total stress.
Activity variety: Incorporating lower-impact activities (swimming, cycling with good saddle setup) alongside higher-impact training can maintain fitness while providing symptom relief days.
Fertility-focused timing: If actively trying to conceive, consider timing your highest-volume training blocks for periods when conception is not being attempted, and moderating training during fertility windows.
Athlete timeline: training and recovery
If no procedure: you usually keep training with modifications and support garments
If embolisation or surgery is considered: we discuss time off heavy lifting, return to running, and what to do during the fertility window
If fertility is the priority: we align testing and timing (the trend in semen analysis matters more than panic)
This guide has been shaped by the concerns and experiences patients have shared with me in clinic over the years. The questions you ask—whether about training modifications, fertility implications, or recovery timelines—directly inform what I include and how I explain it. If you have questions this page hasn't answered, or if your experience with varicocele and sport offers insights that might help others, I'd genuinely value hearing from you.
Ask a Question
If something on this page is unclear, or if you have a question I haven't addressed, you're welcome to get in touch. While I can't provide individualised medical advice without a proper consultation—your specific situation requires proper assessment—questions that might help other readers may be incorporated into future updates to this page.
Common themes from patient questions have already shaped sections on post-exercise pain timing, the "myths versus facts" clarifications, and the sport-specific practical modifications. Your question might help the next person seeking the same information.
Share Your Experience
If you've navigated varicocele as an active person—whether managing symptoms conservatively, modifying your training approach, or returning to sport after treatment—your experience could help others feel less alone with this condition.
Many men tell me they felt isolated when first researching varicocele and sport, uncertain whether their symptoms were normal or whether their concerns were valid. Hearing from others who've been through similar experiences can be genuinely reassuring.
I'm considering adding an anonymous patient experiences section in future updates to this guide. If you'd be interested in contributing a brief account of your journey—what worked, what didn't, what you wish you'd known earlier—please let me know.
Was This Guide Helpful?
Feedback helps me understand what's working and what could be improved. If this guide has answered your questions, helped you make decisions about your training or treatment, or simply reassured you that your concerns are valid, I'd appreciate knowing.
Equally, if you found sections confusing, felt important topics were missing, or think the tone didn't quite land, constructive feedback helps me serve future readers better.
You can reach me through the contact form on this website, or mention this page when booking a consultation if you'd like to discuss your situation in more depth.
A Note on Online Discussions
I'm aware that varicocele is actively discussed on social media platforms and forums, with men sharing experiences, concerns, and sometimes conflicting advice. Some of these discussions raise valid questions; others promote treatments with limited evidence or generate unnecessary anxiety.
If you've come to this page after reading worrying posts elsewhere—perhaps about exercise "destroying" fertility or varicocele being a "silent threat"—I hope the evidence-based perspective here has been helpful. The reality is usually more nuanced than alarming headlines suggest, and most men with varicocele can continue enjoying active lifestyles with appropriate awareness and, where needed, effective treatment.
Practice Transparency: Fees and Prices
Radical transparency means that I will always be clear and upfront about the costs and the fees you are going to face.
What We Do Not Yet Know: Limitations of the Evidence
As with all areas of medicine, our understanding of varicocele and sport is still developing. I believe in being open about what the research tells us with confidence, and where genuine uncertainty remains.
Most studies examining varicocele and exercise are observational (watching rather than testing) rather than randomised controlled trials (the gold standard of research). This means we can identify associations — for instance, that athletes with varicocele have worse semen parameters than non-athletes with varicocele — but we cannot definitively prove that exercise caused the difference. There may be other factors that could explain the result that we have not fully accounted for.
The Zampieri long-term study is one of the few that followed participants going forward in time. This provides stronger evidence for a causal relationship between sports participation and varicocele progression. However, it focused on adolescents rather than adult athletes. We cannot assume findings translate directly across age groups.
Sample sizes in many studies are relatively small, and populations studied (often young men in specific countries or sports) may not fully represent the diversity of men seeking guidance.
The impact ratings I've presented synthesise evidence from multiple sources, including peer-reviewed studies, clinical experience, and patient reports. They are not derived from a single definitive study comparing all activities head-to-head under identical conditions—no such study exists.
Individual responses vary considerably. Some men tolerate activities I've rated as "high impact" with minimal symptoms, while others find "low impact" activities unexpectedly problematic. Your anatomy, varicocele grade, baseline fitness, training technique, and numerous other factors all influence your personal response.
The ratings should guide initial thinking and inform conversations with your clinician—they should not be interpreted as absolute restrictions. If an activity feels comfortable and isn't interfering with your goals, the classification on a general index matters less than your lived experience.
While we have reasonable evidence that varicocele affects semen parameters and that intense exercise can compound this effect, long-term conception outcomes in athletes with treated versus untreated varicoceles remain less well-studied than we'd like.
Most fertility research uses semen parameters — sperm count, motility, morphology, and sometimes DNA fragmentation — as indirect measures rather than actual pregnancy rates. These parameters correlate with fertility but do not perfectly predict it. A person with moderately impaired parameters may conceive without difficulty. Another with better numbers may struggle. The relationship is based on likelihood, not certainty.
The optimal timing of varicocele treatment relative to training cycles, the magnitude of benefit from temporary training reduction during conception attempts, and the interaction between varicocele treatment and assisted reproduction outcomes all warrant further research.
Several questions remain genuinely unsettled in the literature:
Whether swimming is truly protective against varicocele or simply neutral compared to sedentary controls. The water-polo study is intriguing but represents a single observation that requires replication.
The exact threshold of training volume or intensity where risk becomes clinically significant. Current evidence suggests a dose-response relationship, but we cannot specify precise cut-offs with confidence.
Whether temporary training reduction during conception attempts independently improves outcomes, or whether its benefit is primarily mediated through allowing varicocele treatment and recovery.
The relative contribution of heat, oxidative stress, mechanical factors, and hormonal fluctuations to exercise-related fertility effects—and whether targeting specific mechanisms (for instance, with cooling strategies or antioxidants) can meaningfully mitigate risk.
These limitations don't mean the guidance on this page is unreliable. The core principles—that intense exercise can unmask or accelerate existing varicoceles, that symptoms characteristically worsen after activity, that fertility effects may compound in very active men, and that treatment is highly effective—are well-supported by consistent evidence across multiple studies.
However, the limitations underscore why individualised assessment matters. Your specific situation may differ from study populations in important ways. Decisions about monitoring, training modification, or treatment should be made collaboratively with a specialist who understands both the evidence and your personal circumstances, goals, and values.
If you're uncertain how to weigh the evidence in your situation, or if you'd like to discuss what these limitations mean for your specific case, I'm happy to explore them during a consultation.
FAQs
For most men, moderate exercise does not worsen varicocele in terms of progression or long-term outcomes. However, certain high-intensity activities—particularly heavy weightlifting with Valsalva—can make symptoms more noticeable and may accelerate the progression of existing subclinical varicoceles in some cases. The key distinction is between experiencing symptoms during/after exercise (which is common and manageable) versus actually worsening the underlying condition (which requires more intensive training over longer periods to occur). General fitness activities are not harmful and have many benefits that outweigh any theoretical varicocele concerns.
The decision about varicocele surgery depends on your symptoms, fertility concerns, and personal circumstances—not specifically on whether you're an athlete. However, if symptoms are significantly interfering with training, or if you're concerned about fertility while continuing high-intensity exercise, treatment may be particularly beneficial. The recovery period (4-6 weeks) is relatively short, and most athletes report improved comfort and ability to train after successful repair. This is a decision best made with specialist advice tailored to your situation.
Most men can return to light gym activity by 2-3 weeks post-operatively, with progression to full training by 4-6 weeks. Heavy compound lifts (deadlifts, squats) should be the last exercises reintroduced. Always follow your surgeon's specific guidance, as individual circumstances vary. The good news is that most athletes find their varicocele-related symptoms are substantially or completely resolved after successful surgery, often allowing better training than before.
Varicocele is the most common correctable cause of male infertility, and research suggests that intense athletic training may compound its negative effects on semen parameters. The mechanisms involve heat, oxidative stress, and mechanical factors. Importantly, these effects are often reversible: treatment of varicocele typically improves semen parameters, and temporary reduction in training intensity during conception attempts may also help. For athletes with fertility concerns, proactive assessment and management is worthwhile.
Rather than "avoid," I'd suggest being thoughtful about exercises that create high intra-abdominal pressure: heavy deadlifts, squats, leg press, and standing overhead press are the main ones. Many men can continue these with modifications (breathing technique, moderate loads, adequate rest intervals). Machine-based alternatives often allow similar muscle targeting with less pressure demand. The goal isn't necessarily to eliminate exercises, but to modify your approach so symptoms are manageable.
Post-exercise symptoms are characteristic of varicocele. During activity, blood is actively pumped through your system; once you stop, the muscular pumping ceases and blood that accumulated in the dilated veins during exercise takes time to drain. The gravitational load is now unopposed, leading to the typical dull ache or heaviness. Symptoms tend to peak 1-3 hours post-exercise and usually resolve overnight. Elevation, cool showers, and supportive underwear can help manage this pattern.
Cycling doesn't cause varicocele, but it presents specific challenges for men who have one: saddle pressure, heat accumulation, and prolonged seated positioning. The impact tends to be more on fertility (through sustained scrotal temperature elevation) than on symptoms. Good saddle choice, proper bike fit, standing intervals, and adequate ventilation can make cycling comfortable and reduce any impact. Many cyclists with varicocele continue to ride successfully with appropriate equipment modifications.
Varicocele doesn't directly affect athletic performance in the way an injury to a muscle or joint would. However, if symptoms are distracting or limiting your ability to train as you'd like, this could indirectly affect your progress and enjoyment of sport. Some men also report a psychological impact from concern about their condition. Treatment of symptomatic varicocele typically allows full return to training without limitation, often with improved comfort.
GGO Med Resources
If you'd like to explore related topics in more depth, the following pages on this website may be helpful:
Our comprehensive Varicocele Guide covers diagnosis, grading, treatment options, and what to expect from surgery or embolisation in detail. If you're considering treatment, this provides the complete picture.
The Male Fertility Overview explains the broader context of reproductive health, including how varicocele fits alongside other factors affecting fertility.
References and Further Reading
Special note about how references have been selected and used
This guide synthesises evidence from peer-reviewed research, clinical guidelines, and my experience treating active men with varicocele. Below are the key studies informing the guidance on this page, organised by topic.
Physical Activity and Varicocele Progression
Zampieri N, Dall'Agnola A. Subclinical varicocele and sports: a longitudinal study. Urology. 2011;77(5):1199-1202. This three-year prospective study followed adolescent boys and found that regular sports participation (three or more times weekly) was associated with a significantly higher rate of subclinical varicocele progressing to clinical varicocele (36% versus 5%). Crucially, sports did not increase the development of entirely new varicoceles in boys without baseline reflux—suggesting exercise unmasks rather than creates varicoceles.
Rigano E, Santoro G, Impellizzeri P, et al. Varicocele and sport in adolescents: a preliminary report. J Endocrinol Invest. 2004. Found that overall varicocele prevalence was not higher in athletes than non-athletes, but athletes with longer weekly training durations (7-12 hours per week) showed higher prevalence and severity than those training less—suggesting a dose-dependent relationship with training volume. doi:10.1007/BF03346257. https://pubmed.ncbi.nlm.nih.gov/15129807/
Athletes, Varicocele and Fertility
Di Luigi L, Gentile V, Pigozzi F, Parisi A, Giannetti D, Romanelli F. Physical activity as a possible aggravating factor for athletes with varicocele: impact on the semen profile. Hum Reprod. 2001;16(6):1180-1184. This pivotal study compared four groups: athletes and non-athletes, with and without varicocele. Athletes with varicocele had significantly worse sperm motility and morphology than non-athletes with equivalent varicoceles. Only the athletic varicocele group showed significant testicular volume discrepancy—a marker of varicocele-induced testicular damage.
Radojević N, Lazović JM, Šantrić V, et al. Restricting sports activity in reducing the rate of varicocele and related infertility parameters in athletes. Arch Med Sci. 2015;11(1):169-173. Adolescent athletes with varicocele who stopped sports for six months showed significant improvements in sperm concentration and motility, with complete resolution of varicocele in 18 out of 49 athletes and one-grade improvement in a further 19. This provides evidence that training-related varicocele effects can be at least partially reversible.
Oranges F, Mirone V, Verze P, et al. The Influence of an Intense Training Regime in Professional and Non-Professional Athletes on Semen Parameters: A Systematic Review. J Clin Med. 2025;14(1):201. This recent systematic review confirmed that intensive training regimes can negatively affect semen parameters through mechanisms including oxidative stress, elevated scrotal temperature, and hormonal fluctuations—effects that may compound existing varicocele-related impairment.
Pain and Physical Activity
Ebiloglu T, Kaya E, Köprü B, Topuz B, Irfanoğlu ME, Kibar Y. The effect of physical activity on varicocele pain and resolution of this pain by different varicocelectomy techniques. Can J Urol. 2016;23(3):8285-8290. Quantified the relationship between exercise and varicocele pain: among men with painful varicoceles, continuous physical activity caused mean pain scores to spike from approximately 3/10 at baseline to 7.5/10 post-exertion. Microsurgical varicocelectomy provided essentially complete pain relief in most cases.
Athlete Prevalence and Awareness
Aldhafery BF, Alzerwi NA, Aldhuayan AA, et al. Prevalence and awareness of varicocele among athletes in Riyadh, Saudi Arabia. Res Rep Urol. 2019;11:231-238. Examined 382 athletes and found varicocele prevalence of 46%—substantially higher than the general population rate of approximately 15%. All men with grade 3 varicoceles were training five days per week. Awareness of varicocele among athletes was low, with only 31% having heard of the condition and just 12% understanding its potential fertility implications.
Swimming and Aquatic Sports
Di Luigi L, et al. (Study comparing water-polo players to other athletes) Found that water-polo players had a lower incidence of varicocele (approximately 9%) than even non-athlete controls (approximately 12%), suggesting potential protective effects from horizontal positioning, water cooling, absence of Valsalva strain, and hydrostatic pressure assisting venous return.
Clinical Guidelines
Practice Committee of the American Society for Reproductive Medicine. Report on varicocele and infertility: a committee opinion. Fertil Steril. 2020;114(6):1135-1142. Current ASRM guidance on varicocele assessment and treatment in the context of male infertility.
European Association of Urology. Guidelines on Male Infertility. 2024. European clinical recommendations for varicocele management.
NICE Clinical Knowledge Summaries. Male Infertility. Updated 2024. UK national guidance, with significant draft updates expected in 2026 regarding varicocele treatment for fertility.
Background Reading
Shi M, Zhang Y, Zhang X, et al. Risk factors associated with varicocele: a narrative review. Transl Androl Urol. 2024;13(5):819-830. Comprehensive overview of varicocele risk factors including anatomical, genetic, and lifestyle factors.
The Sports Impact Index presented on this page synthesises evidence from multiple sources. For transparency, here is the specific evidence underpinning each rating:
High Impact Activities
Heavy Weightlifting / Powerlifting and CrossFit / HIIT: Rated high based on the Valsalva mechanism generating intra-abdominal pressures of 150-200 mmHg during heavy lifts, the Di Luigi study demonstrating compounded fertility effects in athletes with varicocele, and older literature reporting 60-80% varicocele prevalence in competitive bodybuilders (though these figures may reflect selection bias). The Aldhafery study's finding that all grade 3 varicoceles occurred in men training five days weekly supports a dose-response relationship with intense training.
Moderate Impact Activities
Indoor Cycling / Spin: Rated moderate based on heat accumulation without outdoor airflow, saddle pressure on perineum, and prolonged seated positioning. Specific comparative studies are limited; rating extrapolated from general cycling research on perineal pressure and scrotal temperature studies.
Road Cycling (long rides): Rated moderate based on multiple studies documenting sustained scrotal temperature elevation during cycling, perineal pressure effects, and prolonged seated position. Partially offset by the horizontal positioning advantage and outdoor airflow.
Marathon / Ultra Running: Rated moderate based on the Zampieri longitudinal study (36% versus 5% progression in active versus sedentary adolescents) and cumulative impact loading over thousands of footstrikes. The Di Luigi study confirmed semen parameter effects in endurance athletes.
Team Sports (Football, Rugby): Rated moderate based on the Aldhafery study showing 46% varicocele prevalence among athletes with higher grades associated with greater training frequency. Combines elements of impact, exertion, and variable intensity.
Low to Moderate Impact Activities
Recreational Running: Rated low-moderate based on the Zampieri study showing lower progression rates with moderate training frequency (fewer than three times weekly) compared to intensive training.
Source:
PUBMED.NCBI.NLM.NIH.GOV
NICE Clinical Knowledge Summaries. Male Infertility. Updated 2024.
Zampieri N, Dall'Agnola A. Subclinical varicocele and sports: a longitudinal study. Urology. 2011;77(5):1199-1202
Source:PUBMED.NCBI.NLM.NIH.GOV
Rigano E, et al. Varicocele and sport in adolescents: a preliminary report. J Endocrinol Invest. 2004
Source:PUBMED.NCBI.NLM.NIH.GOV
Di Luigi L, et al. Physical activity as a possible aggravating factor for athletes with varicocele: impact on the semen profile. Hum Reprod. 2001;16(6):1180-1184
Source:PUBMED.NCBI.NLM.NIH.GOV
Radojević N, et al. Restricting sports activity in reducing the rate of varicocele and related infertility parameters in athletes. Arch Med Sci. 2015;11(1):169-173
Source:PUBMED.NCBI.NLM.NIH.GOV
Oranges F, et al. The Influence of an Intense Training Regime on Semen Parameters: A Systematic Review. J Clin Med. 2025;14(1):201
Source:PUBMED.NCBI.NLM.NIH.GOV
Ebiloglu T, et al. The effect of physical activity on varicocele pain and resolution by different varicocelectomy techniques. Can J Urol. 2016;23(3):8285-8290
Source:PUBMED.NCBI.NLM.NIH.GOV
Aldhafery BF, et al. Prevalence and awareness of varicocele among athletes in Riyadh, Saudi Arabia. Res Rep Urol. 2019;11:231-238
Source:PUBMED.NCBI.NLM.NIH.GOV
Practice Committee of ASRM. Report on varicocele and infertility: a committee opinion. Fertil Steril. 2020;114(6):1135-1142
Source:PUBMED.NCBI.NLM.NIH.GOV
Shi M, et al. Risk factors associated with varicocele: a narrative review. Transl Androl Urol. 2024;13(5):819-830
Source:PUBMED.NCBI.NLM.NIH.GOV
Further Readings
Fertility Network UK
Source:FERTILITYNETWORKUK.ORG
Human Fertilisation and Embryology Authority (HFEA)
Source:HFEA.GOV.UK
EAU Guidelines on Male Infertility
Source:UROWEB.ORG
AUA/ASRM: Diagnosis and Treatment of Infertility in Men
Source:AUANET.ORG
Men's Health Forum
Source:MENSHEALTHFORUM.ORG.UK
Moderate Gym Training: Rated low-moderate based on the Rigano study finding overall prevalence not elevated in athletes, with dose-dependent effects only apparent at higher training volumes.
Low Impact Activities
Swimming: Rated low based on the study of water-polo players showing approximately 9% varicocele incidence versus approximately 12% in non-athlete controls, suggesting possible protective effect. Mechanisms include horizontal positioning reducing gravitational pooling, water cooling maintaining scrotal temperature, absence of Valsalva strain, and hydrostatic pressure potentially assisting venous return.
Walking / Yoga / Pilates: Rated low based on minimal intra-abdominal pressure generation, absence of impact loading, and no significant heat accumulation. No studies directly examining varicocele impact; ratings derived from physiological principles.
