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The intensity of exercise is important because it burns calories faster and causes a sustained increased basal metabolic rate for several hours afterwards. Interval exercise stimulates the ability of the body to condition itself faster. We burn fat until we become fatigued, at which we begin to burn carbohydrate and produce lactic acid. Aging is associated with...

If you maintain or improve your fitness level, even if your body weight has not changed or increases, you can reduce your risk of death. This data is according to research reported in the journal Circulation in December of 2011 on 14,000 men of average age 44 over 6 years. For every MET (the energy expended during exercise) increase over 6 years of a 19% reduction...