Maybe its not the saddle after all...

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Anonymous's picture

Research indicates that endurance exercise training has significant effects upon the reproductive endocrine system of humans. Until recently, this effect was thought to be limited primarily to women. However, a growing body of evidence demonstrates that the male reproductive endocrine system is also effected. Specifically, the circulating hormonal levels of testosterone are found to be at low concentrations and, the hypothalamic-pituitary-testicular axis that regulates testosterone production is altered in endurance trained men. The physiological mechanism inducing the lower testosterone is currently unclear but in many respects, these men display hypogonadotropic hypogonadism characteristics. Currently, the time course of the changes in the reproductive endocrine system is unresolved and in need of much furthers scientific investigation. The evidence available, however, suggests that a slowly developing process requiring years of exercise training results in these changes. Potentially, the lowered testosterone levels of the endurance-trained male could disrupt some of their anabolic or androgenic dependent processes. To date, there are only a limited number of findings suggesting that a consistent disruption of testosterone dependent processes occur due to endurance exercise training (e.g., oligo-spermatogenesis). Conversely, the alterations in testosterone concentration brought about by endurance training could have cardiovascular protective effects and thus be beneficial to the health of these men.

Anonymous's picture
Neile (not verified)

"Will memorize for the next time I have a non-cycling-performance-related event I need to account for.

[Much better than ""I ran out of chamois butter ...""]"

Anonymous's picture
Bill Vojtech (not verified)
In english please? (nm)
Anonymous's picture
Anthony Poole (not verified)
What's the source

Is this real science, or does it fall into the same category of informative bollocks as astrology? That aside, what, or who is the source of this? And why is it that the professional peleton seems to have no difficulty reproducing?

Anonymous's picture
John Z (not verified)
Real Science

I only post real science. I did come upomn this accidentally, but when I did a quick check (you can Google too) I found many, many papers talking about reduced testosterone in endurance athletes.

cycling trips