Add yet another benefit from regular exercise: Improved sex. If you're already physically fit, you're likely to derive more enjoyment from sex--and also be more sexually active. Those who exercise regularly tend to have higher levels of desire, greater sexual confidence and frequency, and an enhanced ability to be aroused and achieve orgasm -- no matter their age.

Aerobic exercise seems to be the real libido booster. One theory suggests that exercise triggers the release of endorphins, opiate-like chemicals produced in the brain that create a sense of well-being, which makes you more receptive to sex. It doesn't matter which type of aerobic exercise you choose. You should try to get at least 30 minutes of exercise every day. Keeping fit can also boost your self-esteem, confidence and body image, all of which are important factors to maintain a positive attitude toward sex.