When it comes to dieting, Exercise really is the magic pill. Calorie restriction and exercise have long been known as the dieting duo necessary for success. Unfortunately the necessary amount of time spent exercising is often grossly underestimated. New research found that 55 minutes of moderate exercise, 5 days a week was needed to not only lose weight, but more importantly to maintain weight. The four year study, involving 200 women, emphasizing the calorie restriction alone is not enough. Moderate exercise is necessary for getting the weight off and keeping it off, which often proves more difficult than losing the weight in the first place.