
The term energy gap is used to estimate the change in energy balance (intake and expenditure) behaviors required to achieve and sustain reduced body weight outcomes in individuals and population at large. Many people have achieved significant weight loss with intervention, but very little of this weight loss seems be maintained by most people over the long term. The energy gap can help estimate the degree of behavior change that must be maintained to maintain a given amount of weight loss for any individual.The two key factors related to the energy gap concept: prevention of excess weight gain and maintenance of achieved weight loss. It is estimated that the energy gap for prevention of weight gain among those who have lost weight is about...