Should You Cool Your Testicles in a Sauna? What the Science Says

As more men incorporate sauna sessions into their wellness routines, a common question arises:

Should you actively cool your testicles during sauna use?

The question may sound unusual, but it is rooted in biology.

Unlike most organs in the body, the testes sit outside the abdominal cavity because sperm production functions best at temperatures slightly below core body temperature. This natural cooling system is one reason the scrotum can contract or relax depending on environmental conditions.

With sauna temperatures often reaching 70–100°C, it's understandable that some men wonder whether regular heat exposure could affect fertility.

Why Temperature Matters

Sperm production, known as spermatogenesis, is sensitive to heat.

The testes typically operate a few degrees below core body temperature. Research has shown that prolonged increases in testicular temperature may temporarily reduce sperm count and sperm quality in some men.

This is not unique to saunas.

Researchers have investigated similar effects from:

• Hot tubs
• Frequent hot baths
• Tight clothing
• Prolonged laptop use on the lap
• Certain occupational heat exposures

The key factor is not necessarily a single sauna session but repeated and sustained increases in testicular temperature over time.

What Does the Research Show?

Several studies have found that intensive heat exposure may temporarily reduce sperm parameters in healthy men.

However, the important word is temporary.

Many studies show that sperm quality often returns to baseline after reducing heat exposure or allowing sufficient recovery time.

For men who are not actively trying to conceive, occasional sauna use is unlikely to be a significant concern.

For men currently attempting to maximise fertility, the conversation becomes more nuanced.

What Do Longevity Experts Do?

Interestingly, many high-profile longevity advocates continue to use saunas regularly despite awareness of the fertility research.

Bryan Johnson has openly discussed tracking a wide range of health biomarkers while maintaining heat exposure practices.

Peter Attia and Andrew Huberman have both discussed balancing the potential benefits of sauna use with individual goals and circumstances.

The consensus among performance and longevity practitioners is generally straightforward:

• Sauna use may provide significant health and recovery benefits.
• Men actively trying to conceive may wish to be more cautious about excessive heat exposure.
• Context matters more than blanket rules.

Should You Cool Your Testicles?

Some men choose to cool the scrotal area during sauna sessions using:

• A cold, damp towel
• Cooling packs before and after sessions
• Shorter sauna exposures
• More moderate temperatures

The goal is to reduce local temperature while still enjoying the broader physiological benefits of heat exposure.

However, evidence specifically examining active testicular cooling during sauna use remains limited.

There is currently no universally accepted protocol showing that cooling the testes during sauna sessions fully eliminates fertility-related concerns.

What Does KOVE Recommend?

At KOVE, we believe sauna use should be adapted to individual goals.

For most healthy men using a sauna for recovery, relaxation or general wellbeing, there is little reason to become overly concerned about occasional heat exposure.

However, if you are:

• Actively trying to conceive
• Undergoing fertility treatment
• Monitoring sperm quality

Then a more cautious approach may be appropriate.

We generally recommend:

• Limiting excessively long sauna sessions
• Using moderate temperatures where comfortable
• Staying hydrated
• Avoiding multiple prolonged sessions every day
• Speaking with a healthcare professional if fertility is a specific concern

A Practical Approach

For most users, the optimal strategy is surprisingly simple:

• Sauna 15–20 minutes
• Cool down naturally
• Use a cold plunge or cool shower afterwards
• Focus on consistency rather than extreme heat exposure

The benefits of regular sauna use often come from long-term adherence rather than pushing temperatures or duration to extremes.

Can a Cold Plunge Help?

Many sauna users combine heat exposure with cold-water immersion. While a cold plunge immediately after a sauna session may help bring body temperature down more quickly, there is currently limited evidence showing that post-sauna cold exposure specifically protects fertility.

That said, alternating between heat and cold has become increasingly popular among athletes, biohackers and longevity enthusiasts because of the way it can enhance recovery, improve alertness and create a powerful wellness ritual.

For men concerned about fertility, a post-sauna cold plunge may provide a more comfortable cooling strategy than attempting to manage temperatures during the sauna session itself.

Final Thoughts

The question isn't whether sauna use is "good" or "bad" for fertility.

The real question is whether your current goals prioritise recovery, longevity and wellbeing, or whether you're actively trying to maximise fertility in the short term.

For most men, moderate sauna use remains a valuable wellness practice. For those focused on conception, reducing heat exposure and considering cooling strategies may provide additional peace of mind while the science continues to evolve.

As with most aspects of health optimisation, the best approach is one that aligns with your personal goals, lifestyle and risk tolerance.