The American College of Sports Medicine and the American Heart Association recently revised their physical fitness guidelines due to the mounting evidence that "maintaining muscle mass is key to preventing chronic illnesses such as diabetes and heart disease."
The guidelines continue to recommend 30 minutes of moderate physical activity five days a week and now also advise 8-10 strength training exercises on two non-consecutive days of the week.
Furthermore, the two associations are encouraging doctors to start prescribing exercise as medicine and offer advice and additional resources to their patients. For more information check out the official site of the campaign at exerciseismedicine.org and take a look at this run down on how exercise extends life and health.
Source
Best Life, Nov. 2007
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Heart Disease is easily the leading cause of death in America. One of the major contributors to heart disease is cholesterol. See the following posts for more on lowering your risk for heart disease:How To Lower LDL Cholesterol Levels Naturally