Exercise And The Myth of Moderation

Obesity experts agree that daily exercise is essential for good health, but whether it can successfully lead to long-term weight loss is a question of much debate. What has become increasingly clear, however, is that the conventionally accepted advice -- 30 minutes of moderate-intensity activity most days of the week -- is probably insufficient to spur any real change in a person's body weight. A study published July 28 in the Archives of Internal Medicine adds to the burgeoning scientific consensus -- when it comes to exercise for weight loss, more is better. It suggests that obese people would have to exercise at least an hour at a time to see any significant difference in their weight.

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