Eating is also important. Exercise must be combined with eating to achieve results. To eat low-calorie things, the daily intake of calories is greater than the intake of calories in order to achieve the effect of losing weight! If you want to lose weight, you should do 100 sit-ups in five groups and leg lifts in three groups, with 30 in each group. Are you sure your stomach will become firm? You don't have to do so many exercises every day, just do it in the afternoon, do aerobic exercise for 45 minutes, run fast or fast, and do some anaerobic exercise.