In fact, the weight before and after fitness does not mean anything. You may get lighter and lighter when you get stronger. I don't think those athletes are as thin as possible. Lightness means nothing. Weight is influenced by many conditions. For example, the weighing time should be the time closest to the real weight at a certain point in time. In fact, you have lost weight after fitness, but it has not been reflected in your weight.

When we exercise, our bodies consume a lot of sugar and water. In order to support the body to function more effectively, the body should store more sugar and water, which will also increase the weight, but when the body adapts to this state, it will be much better and the weight will drop.

What's more, we exercise to lose more fat than to lose weight. It's just that most of us have more fat than those who exercise, so exercise will also reduce excess fat. When we exercise, we will lose fat and gain more muscles, so our weight will naturally not drop too much. You won't lose too much weight unless you were too fat and had too much body fat. Moreover, when we gain muscle through fitness, the muscle content in our body increases and the fat content decreases at the same time, but the density of muscle is higher than that of fat, and muscle will be heavier than fat in the same volume, so it is normal to gain weight. You see, the muscles of strong people are tight and hard to the touch, while the fat of obese people is soft to the touch and obviously not as heavy as muscles.

Of course, there are many other reasons, such as drinking too much water after fitness, not weighing before and after, weighing scale's qualifications, reasonable diet, etc., which will make the numbers on the weighing scale deviate, especially after fitness, controlling diet may also reduce the effect of exercise, but it will be fatter. Setting a fixed time to weigh will have a more obvious effect.