Confirmed: Couch Potatoes Have Lower Sperm Counts
Men who exercise vigorously each week have more sperm, study says.
According to new research, couch potatoes who watch lots of TV have fewer sperm than men who exercise moderately or vigorously each week.
Sperm count is a measure of semen quality, which has mysteriously declined in U.S. men in recent decades. Low sperm count is linked to infertility as well as testicular cancer, prostate cancer, and cardiovascular problems later in life.
(Related: "Deep-Voiced Men Have Lower Sperm Counts, Study Says.")
That's why scientists have been searching for ways that men can improve their sperm—including changing daily behaviors.
"We know little about how lifestyle may impact semen quality," said study leader Audrey Jane Gaskins, a doctoral student in nutrition at the Harvard School of Public Health.
Her discovery that two changeable behaviors—exercise and