If you are a thin man weighing 55KG and are not used to it in 1 week, the first strength training will make you ache all over, and 1 month changes little, so you may have to give up. 1 year later, you will have obvious changes, with tight muscles and obvious abdominal muscles, and gain 3KG. In the third year, you will begin to be infatuated with the dimension of your own arm and envy others' thick arms. You've made many friends, too. Five years later, you have unicorn arms, tough chest muscles, thick thighs and enviable 70KG abdominal muscles. 10 years later, you met many people who love fitness as much as you, participated in bodybuilding competitions, weighed 85KG, opened your own gym, began to preach and teach, and shared your gains for many years. . . . . Of course, this is just talk. Sao nian, you should be preparing for fitness or just starting fitness. I just want to tell you that infinite daydreaming will not have any results. Why not stick to it for a while and see if you can meet your expectations? Sweat and will will be your best companions during that time, and the happiness you get from them can't be expressed in words!