There are many reasons. 1 You can't lose weight by eating too much during exercise, and you won't get immediate results at the beginning of exercise. This is the time when fat turns into muscle. Will fat become thin when it becomes muscle? Only when you exercise to a certain extent can your muscles become strong and you feel thin.

2. When you are resting, carefully check whether your diet has been reduced to some extent. It is also possible that when you rest, it is the time when exercise is effective, so you have lost weight.

3. Exercise to lose weight should choose the method, time and intensity of exercise according to personal physique. If the choice is wrong, it may lead to weight gain, because too many people eat too much, as 1 point said.