Newswise — For men who manage to avoid major medical problems, the changes that come along with aging are slow and gradual, but they do add up. The December issue of Harvard Men's Health Watch describes some things that aging can do to men—and things that men can do to stop Father Time from taking his toll.

One of the main ways to keep the effects of aging at a minimum is exercise. The chart to the right, first published in Harvard Men's Health Watch, shows the effect of both aging and exercise on different body systems. "Exercise is not the fountain of youth," says Dr. Harvey Simon, editor in chief of Harvard Men's Health Watch, "but it is a good long drink of vitality, especially as part of a comprehensive program that includes aerobic exercise, strength training, and stretching."

Also in this issue:

"¢ Cancer of the penis"¢ Sexual activity and prostate cancer "¢ A doctor answers: Does chelation therapy work? Do I need to fast before a PSA test?

Harvard Men's Health Watch is available from Harvard Health Publications, the publishing division of Harvard Medical School, for $24 per year. Subscribe at http://www.health.harvard.edu/men or by calling 1-877-649-9457 (toll free).

Dr. Harvey Simon's new Harvard Health Publications book, The No Sweat Exercise Plan: Simple Steps to Lose Weight and Improve Your Health Without Spending Hours In the Gym, will be published by McGraw-Hill in January 2006.