2. Exercise consumes energy and promotes the oxidative decomposition of fat stored in the body, thus reducing fat. But at the same time, frequent muscle contraction and exertion during exercise will stimulate muscle fibers to thicken and increase muscle mass. In the body, the water content of muscle tissue is much higher than that of fat tissue, so muscle is "heavier" than fat (strictly speaking, on the premise of the same volume). In other words, as long as the muscle "less" increases, it will offset the weight loss caused by the "more" reduction of fat. Eventually, the weight loss before exercise is not obvious.

Extended data

1. Many people will gain weight at first after they start running, but they obviously feel in good shape after putting on clothes. They can wear clothes that they couldn't wear before, and their waistlines are thinner. This is actually the result of running to lose weight, because it means that almost all the fat has been reduced. Only the weight loss with reduced fat rate is the real weight loss, and it is the weight loss that makes the body beautiful.

2. It's a pity that most people are depressed because they forget the fundamental goal of losing weight, and they can't see the effect of losing weight in the early stage of running, which makes the great cause of losing weight give up halfway.

3. So, stick to it, even if you can't see the desired result, since you have chosen to start, don't give up easily. If you get through this difficult initial stage, you are sure to have the joy of harvest.