Cycling can affect man’s fertility

Saturday, December 11, 2010

LONDON - If you are a male and love cycling, possibility is that you are likely to suffer from lower sperm levels.

Cycling for at least five hours a week can affect a mans fertility, according to researchers.

Previous studies have shown that professional cyclists are likely to suffer lower sperm counts and poor semen quality, reports

Now it appears the risk is the same for casual cyclists too.

Men who cycle at least five hours a week have fewer and less active sperm than men who do not exercise at all, the study said.

Researchers at Boston University surveyed 2,200 men attending fertility clinics who all agreed to provide a semen sample.

After adjustment for body weight, blood pressure, choice of underwear and other variables, they found that men who exercised regularly were no more likely to have problems with the quality or quantity of their sperm than men who never exercised.

But when they looked at specific types of exercise, men who said they spent at least five hours a week cycling were twice as likely to have both a low sperm count and relatively poor sperm mobility.

This may be due to trauma or temperature rises in the scrotum, said study leader Lauren Wise.

“More studies are needed to replicate our findings before they can be considered causal,” she said.

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