Weight-scaleA substantial number of people who exercise wind up heavier afterward than they were at the start, with the weight gain due mostly to extra fat, not muscle, according to a new study. But researchers also found, for the first time, that one simple strategy may improve people’s odds of shedding pounds while exercising: Eat a more sensible diet, The New York Times reports. In most of the studies involving exercise and weight lost, people lost barely a third as many pounds as expected, given how many calories they were burning during workouts. Many studies have also found big variations in how people’s waistlines respond to the same exercise program, with some people dropping pounds and others gaining fat. More