Exercise alone might not reverse childhood obesity trend

Researchers follow more than 200 British school children. They found, even if the children were getting the recommended amount of exercise, it did not affect weight over time.

The study in the journal Archives of Diseases in Childhood says diets will have to improve if there is to be an impact on weight and health.

That's not to say exercise has no benefits. Compared to sedentary kids, those who exercised had healthier blood pressure, cholesterol and insulin levels.