Cycling and Fertility: Does Biking Affect Sperm and Ovulation 2026

Does cycling affect fertility? For most people, the answer is no, but extreme cycling can impact reproductive health. According to fertility experts, moderate cycling is safe, while elite-level training may disrupt ovulation in women and sperm production in men.

How Cycling Affects Female Fertility

For women, cycling is unlikely to affect fertility unless done at extreme levels. Prof Colin Duncan, a fertility expert at the University of Edinburgh, explains that elite athletes who train intensely can lower their body fat to a point where ovulation stops. "Doing huge amounts of physical activity can lower body fat, and that can switch off the ovaries," he says. This can lead to missed periods and reduced fertility. However, for the average woman who cycles recreationally, there is no significant impact on fertility.

How Cycling Affects Male Fertility

For men, the concern is different. Prolonged sitting on a bicycle saddle can increase the temperature around the testicles, potentially affecting sperm production. Sperm develop best at a cooler temperature, which is why the testicles are located outside the body. However, Duncan notes that the testicles produce far more sperm than needed for fertility. "If you cycle a normal amount, it's still going to make absolutely no difference at all," he says. Only extreme cycling might slightly reduce sperm count, and this is more likely to matter for men with already borderline sperm counts.

Comparing Cycling Intensity and Fertility Impact

Key Takeaways

• Moderate cycling does not affect fertility in men or women.
• Extreme cycling in women can lower body fat and stop ovulation.
• Extreme cycling in men can raise testicular temperature and slightly reduce sperm count.
• Men with borderline sperm counts may be more affected.
• Consult a fertility specialist if you have concerns.

When to Seek Advice

If you're a competitive cyclist and are trying to conceive, it's wise to consult a fertility specialist. They can assess your individual risk factors and provide guidance. For most people, cycling remains a healthy activity that supports overall well-being without harming fertility.

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