Harvard School of Public Health http://www.hsph.harvard.edu/
Exercise Can Help Control Weight
Obesity results from energy imbalance: too many calories in, too few calories burned. A number of factors influence how many calories (or how much “energy”) people burn each day, among them, age, body size, and genes. But the most variable factor—and the most easily modified—is the amount of activity people get each day.
Keeping active can help people stay at a healthy weight or lose weight. It can also lower the risk of heart disease, diabetes, stroke, high blood pressure, osteoporosis, and certain cancers, as well as reduce stress and boost mood. Inactive (sedentary) lifestyles do just the opposite.
Despite all the health benefits of physical activity, people worldwide are doing…
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