Exercise is the best-kept secret in preventive medicine. Despite our other differences, we all need to exercise for health. Regular exercise provides essential protection against many of the diseases that plague our world. The list includes:- heart attack
- stroke
- high blood pressure
- diabetes
- obesity
- osteoporosis and fractures
- depression
- COLON AND BREAST CANCERS
- dementia (memory loss)
What does it take to get these benefits? Less than you might think. The key is what exercise scientists call isotonic exercise—activities that use your large muscle groups in a rhythmic, repetitive fashion without making your muscles work against heavy resistance. It used to be called "aerobic" exercise because we thought it had to be intense enough to boost your heart rate into the aerobic range (70% to 85% of your maximum heart rate). 
In fact, you can get all the health benefits you need from moderate exercise that won't make you huff and puff, even if you do it in little chunks—as long as it adds up to enough total activity and its also done regularly.
Mix daily activities, formal workouts, and sports play to get the cardiometabolic exercise you need for health. And for best results, do some stretching nearly every day and some strength training two or three times a week. The older we get, the more we need these supplementary activities.In fact, you can get all the health benefits you need from moderate exercise that won't make you huff and puff, even if you do it in little chunks—as long as it adds up to enough total activity and its also done regularly.
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