A person's weight will also change in a day. Generally, the human body weighs the lightest in the morning, the heaviest at noon, and the weight at night is between noon and morning. If you want to ask the range of a person's weight change in a day, it is generally around 1 to 2 kg. So going to the gym to gain weight is just to scare yourself. Fitness to lose weight is not an immediate thing, what you need is constant persistence and constant practice. As far as fitness and weight loss are concerned, if you need to see obvious effects, you need to stick to it for at least 6 weeks. It also depends on the frequency and intensity of exercise. However, for friends who really insist on exercising to lose weight, there is no need to worry if they find themselves fat. General dieters will gain weight first and then lose weight if they do strength exercises during weight loss. Because strength exercises can improve the muscle quality of dieters and appropriately increase the muscles of practitioners. The improvement of human muscle mass and the appropriate increase of muscle are absolutely beneficial to dieters. Because it can not only improve the exercise ability of dieters, increase the intensity of future training, but also help dieters consume calories. Secondly, as far as the volume ratio of muscle and fat is concerned, the volume ratio of muscle and fat with the same weight is at least 1: 3. Therefore, muscle gain will not only make the dieter fat, but also shape the dieter and make the dieter's body more symmetrical.