During these periods, an excessive amount of weight gain causes an increased number of fat cells. Once afat cell is formed, you cannot get rid of it - no matter how much dieting you do.
Active individuals require more calories than less active ones.
Weight Heavier people require more calories to maintain their body weights than lighter ones. For example, aperson who weighs 250 lbs. with minimal amounts of physical activity requires approximately 2700 calories to maintain their body weight. If that person goes on a 2000 calorie per day diet, they will lose weight. However, if that person stays with a 2000 calorie daily diet, their weight drops and their metabolic rategradually declines. Eventually, when that person reaches approximately 185 lbs., they require only about2000 calories per day to maintain that weight.