Dr. Todd Manini of the National Institute on Aging reports that older active people who walk, climb stairs, do household chores, or even wash windows are 69 percent less likely to die in a year, compared to people who are far less active (JAMA, June 2006). This study was far more dependable than previous studies because, instead of using a questionnaire, researchers measured how active a person was by measuring the metabolic end products of activity. They used a doubly-labeled water method that directly measures carbon dioxide production over an extended period, the most accurate estimate of energy expenditure.
If you are inactive, you should check with a cardiologist who will do a stress test. If you pass, you should start an exercise program. If you fail, you should work with your doctor to correct the problem and then start an exercise program.
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