NEW YORK (Reuters Health) - There's new advice for older men who want to preserve their sexual function: have sex, and have it often, researchers say.

In a study that followed nearly 1,000 older Finnish men for five years, researchers found that those who were regularly having sex at the start of the study were at lower risk of developing erectile dysfunction (ED) by the study's end.

In fact, the more often the men had sex, the lower their ED risk.

The implication, say the researchers, is that men should be encouraged to stay sexually active into their golden years.

Dr. Juha Koskimaki and colleagues at the University of Tampere in Finland report the findings in the American Journal of Medicine. The study included 989 men who were between the ages of 55 and 75 at the outset.