First, exercise reduces body fat and increases muscles, so the weight does not drop. 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.
Second, exercise does not control diet at the same time, exercise consumes energy, and diet supplements energy. The two are balanced and the weight will not drop. At the beginning of exercise, an obvious reaction of the body is to have a wide appetite and feel very hungry after exercise. If you don't pay attention to controlling your diet, you will have a big meal after exercise. So much energy intake will offset more energy consumed during exercise. For example, the heat consumed by middle-speed running 1 hour is about 350 kcal, and eating 1 steamed bread (flour weight 1 00g) or1small fried dough sticks (50g) can make up for this energy.
Third, there is not enough exercise, too little energy consumption, less oxidative decomposition of body fat, and no weight loss. People often use exercise time to measure the amount of exercise, and think that 1 and 2 hours of exercise is a lot of exercise. But the amount of exercise is also closely related to the intensity of exercise. When the intensity of exercise is very low, such as slow and gentle events such as walking, swimming, yoga and Tai Ji Chuan, the energy consumption is very small, and there is little oxidative decomposition of body fat, so it is impossible to lose weight. Therefore, when choosing sports for the purpose of losing weight, we should adopt high-intensity and large-amount sports, such as running, climbing mountains, climbing stairs, aerobics, ball games and so on.