Simply put, inactivity is hazardous to your health. Study after study has shown that being inactive nearly doubles your risk of heart disease.

In their quest to live a longer and healthier life, many people turn to supplements, herbal remedies and other forms of complementary medicine. But one remedy for a longer life costs nothing and requires no additional studies to prove its effectiveness.

Weight lifting is one of the fastest-growing U.S. fitness activities. And the American Heart Association recently threw its weight behind weight lifting, too.

Obesity, lack of physical activity, and poor nutrition cause about one in three cancer deaths. Only tobacco causes more.

Research shows that an intensive exercise program can help stroke survivors recover their motor skills.

When recommending treatment for clinical depression, physicians typically prescribe a tried-and-true regimen: anti-depressant medication and "talk" therapy. In the future, however, health professionals may be advocating a healthy dose of exercise.