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>a 10-year survey by a Boston-area fertility center that observed 2,261 men—from all walks of life and not just elite athletes—who contributed over 4,500 samples of sperm. Investigators correlated the sperm parameters with the level of exercise, focusing on sperm density (the number of sperm per milliliter), sperm motility (the percentage of sperm that were moving), and sperm morphology (what the sperm look like).
>The study found that men bicycling more than five hours per week had a lower sperm concentration than either sedentary men or those doing other types of exercise. It’s also interesting that the association with the lower sperm counts was not affected by the patient’s age or weight.
Guess I'm walking to work.
