Exercise to lose weight is a long-term process, the middle may rebound, exercise a few days after the weight may also exist for the following reasons: 1, the exercise is not correct; 2, may be the amount of exercise is not enough, such as brisk walking to maintain 30 minutes a day, at least 3 times a week, brisk walking heart rate to reach more than 100 times per minute. At the same time during the exercise to pay attention to diet control, especially dinner do not eat too much, and to adjust their diet structure, eat more vegetables and fruits, less pasta and meat, adhere to 1 month should appear weight loss.