Hello, the purpose of fitness is not to lose weight, but to maintain a good body fat rate and figure. If your figure is tight, it means that your body fat rate has become lower. Unless you only do aerobic exercise, fitness will lead to weight gain, because muscles will increase, so as long as the height and weight fluctuate within a reasonable range of 10%, you don't have to deliberately pursue a thin scale, which is generally acceptable. I'm a fitness instructor, believe me.