The greater number of head blows that boxers and other combat athletes absorb, the greater their risk for brain damage and other complications.

In the continuing debate over the need for circumcision in infants, a new study reports that men who have prostate cancer are less likely to be circumcised.

Men who smoke in middle age have a more rapid decline in memory, learning, and thinking than women who smoke. And the effects linger even after men quit smoking.

Narcissism - that inflated sense of self-importance that often interferes with relationships - appears to play a negative role in men's health, as well, according to a new study.

Question: Which is more important for health, how much your weigh or how fit you are?

Despite steps taken to reduce injuries on construction sites, a new report found that workers have a 75 percent chance of suffering a disabling injury over a 45-year career and a one-in-200 risk of being fatally injured on the job.

Good nutrition is a cornerstone of good health - and may also be the underpinning of healthy sperm. Researchers say a healthy diet seems to improve both the number of sperm and their motility, a measure of how well sperm move around.

Fatherhood brings many changes, but one of them may be particularly surprising: a drop in testosterone levels. Researchers suspect it's because a man with children no longer needs to compete with other men for a mate.

Men who live in the South and West are more likely to live by a code that values defending one's honor at all costs. That mindset is linked to higher rates of accidental death.

Although women are more likely to injure their anterior cruciate ligament (ACL), men with an ACL injury are more likely to develop a hole in their cartilage after surgical repair.

A follow-up study on men with restless legs syndrome (RLS) confirms that having the sleep disorder increases the risk for impotence.

Changing the way the PSA screening test is scheduled could help more men find prostate cancer early, as well as reduce the number of unnecessary biopsies.