Exercise might be beneficial for men trying to have a family. That’s the conclusion from a preliminary study done at the Harvard School of Public Health. More than 100 men who were treated at a fertility clinic participated in the research protocol. They answered questions about their physical activity and provided semen samples.
Those who exercised vigorously an hour a day lifting weights, running or doing other aerobic activity had higher sperm counts. Even men who spent just an hour and a half a week in vigorous outdoor activities had 42 percent improved sperm counts compared to those doing less physical activity. Biking, on the other hand, seemed counterproductive and lowered sperm concentrations.
[Joint meeting of the International Federation of Fertility Societies and the American Society for Reproductive Medicine, Boston, MA]