In the new book Fitter Faster ($17, amazon.com), health journalist Robert J. Davis and celebrity trainer Brad Kolowich, Jr. share one more excellent reason to break a sweat.
You’ve likely heard that regular exercise can reduce the risk of chronic conditions such as heart disease, diabetes, or osteoporosis. But a growing body of research shows it may have another, more surprising effect: improving your sex life.
In men, regular exercise appears to be a natural Viagra. It’s associated with a lower risk of erectile problems. In one study, sedentary middle-aged men assigned to participate in a vigorous exercise program for nine months reported more frequent sexual activity, improved sexual function, and greater satisfaction. Those whose fitness levels increased most saw the biggest improvements in their sex lives.
Research in women has found that those who are physically active report greater sexual desire, arousal, and satisfaction than women who are sedentary. In one unusual experiment, young women who did intense cycling for 20 minutes and watched an X-rated film showed greater physiological sexual arousal (as measured by a device that assesses vaginal blood flow) than subjects who did not exercise before seeing the film.
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Increased blood flow helps explain why exercise leads to better sexual function in men as well. An enhanced self-image from exercise may play a role too. Men and women who exercise may be more likely to feel sexually desirable, which can lead to better sex. So can greater strength, flexibility, and stamina that result from exercise.
In addition, physical activity—especially strength training—can increase levels of testosterone, which may boost sex drive in men and women. However, overtraining can have the opposite effect by lowering testosterone levels. Indeed, a recent study
found that that men who do very vigorous exercise on a regular basis tend to have lower libidos. While this is a potential concern for elite athletes or others who push themselves to the max without adequate recovery, it’s not something that most of us need to worry about.
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