But most past studies have centered on women. Typically, this research has found that when some female athletes, such as marathon runners, train intensely for many hours a week, they can develop menstrual dysfunctions. These problems seem caused by hormonal imbalances occuring because of physical stress and frequently affect a womanâ€™s interest in sex and her ability to conceive.
Then the researchers contacted running, cycling and triathlon training groups, university athletic departments, and publications targeted at endurance athletes and asked them to alert members and readers to the questionnaires, which were available online.
And there were clear patterns. The men whose exercise routines were moderate or light in intensity or duration were far more likely to report moderate or high libidos than were the men whose workouts were especially prolonged or intense, even after the researchers controlled for age.