What if you already have an established condition, such as high blood pressure or diabetes?Pills can still be effective, but your doctor may want to check your heart.Your primary care doctor can prescribe them, and so can a urologist.

"First, it could make you tired and weak the next day," Shrier said. "The second way is that it could affect your psychological state of mind. Power Sports In 2000 Shrier published an editorial titled "Does Sex the Night Before Competition Decrease Performance? He wrote that the "long-standing myth that athletes should practice abstinence before important competitions may stem from the theory that sexual frustration leads to increased aggression." The abstinence tradition is particularly strong in power sports, such as boxing and football, in which aggression is considered a valuable trait. Jannini is a professor of endocrinology, the study of bodily secretions, and has studied effects of sex on athletic performance.

Some people believe the act of ejaculation draws testosterone, the hormone of both sexual desire and aggression, from the body.

Some scientists suggest that abstinence could help some athletes concentrate better.

"There are two possible ways sex before competition could affect performance," said Ian Shrier, a sports medicine specialist at Mc Gill University in Montreal, Canada.

In fact, some studies suggest that pre-sports sex may actually aid athletes by raising their testosterone levels, for example.

It is unclear, however, what psychological effects sex may have on an athlete's performance.

Four federal agents were killed in a bloody gunbattle with the cultists that Sunday, and 20 more were wounded. By that evening, the muddy encampment called Satellite City had sprouted nearby.

Hundreds of reporters from around the world loitered for the next six weeks, eating Salvation Army doughnuts, getting haircuts, practicing their golf swings, and chronicling a darkly comic cat-and-mouse game between Koresh and FBI negotiators. "David Koresh has admitted he's not really Jesus but actually is a disgruntled postal employee." Most assumed that the nuts near Waco would eventually come marching out. While the siege droned on, I was working on a book about Koresh, talking to people around the world with firsthand acquaintance.

However, a drop-off in desire can be related to hormones.