Several studies now suggest exercising while your body is low on fuel may be a good way to trim excess fat.
European researchers found the cyclists who trained without eating burned significantly more fat than their counterparts who ate.
Muscles usually get their energy from carbohydrates. But if you haven't eaten before exercising your body does not have many carbs in reserve. Scientists say that forces it to burn fat instead.
But other experts warn against doing too much exercise on an empty stomach. They say you may burn fat, but you'll also lack energy.
