Sleep apnea and sleep problems affect erectile dysfunction
Non-obese men with obstructive sleep apnea have been found to have lower testosterone levels. This in turn leads to decreased sexual activity and libido.
In another recent study in young, healthy men, testosterone levels dropped by 10 to 15% after a week of restricting sleep to five hours a night. The researchers found that the effects of sleep deprivation on testosterone levels were particularly pronounced between 2:00 p.m. and 10:00 p.m. the next day.