Exercise Adds 4 Years

A recent study has quantified the benefit of almost daily exercise in terms of length of life.

The researchers looked at records of more than 5,000 middle-aged and elderly Americans and found that those who had moderate to high levels of activity lived 1.3 to 3.7 years longer than those who got little exercise, largely because they put off developing heart disease -- the nation's leading killer. Men and women benefited about equally.

Here's a summary article about the exercise study.

In other health-related news, exercise has been linked to a reduced risk of breast cancer, and other research suggests that decaffeinated coffee may have a harmful effect on the heart by increasing the levels of a specific cholesterol in the blood.