From NY Times
Men who exercise strenuously may have a lower libido than those whose workouts are lighter, according to one of the first studies to scientifically delve into the relationship between men’s workouts and their sex lives.
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. (Older men tend to report less interest in sex, although not by much.)
http://www.nytimes.com/2017/02/22/well/ ... -life.html