There May Be an Exercise 'Sweet Spot' for Losing Weight

Working out has numerous health benefits, but if you are trying to lose weight, exercise alone may not be enough: The body may adapt to higher levels of physical activity, so you may not burn more calories even if you exercise a lot, a new study suggests. The researchers found that the people in the study who engaged in moderate levels of physical activity burned about 200 more calories per day, on average, than those who had the lowest levels of physical activity. It is not clear why, exactly,