Don't gain weight, I wish I had lost weight. The only disadvantage of being thin is that it is difficult to gain muscle, but there are many benefits. For example, the lines are clear and there is no need to lose fat. Let's start with running. Thin people have less sebum. It is best to practice alone when doing cardiopulmonary exercise, and try to reach 70% heart rate. Don't go into a state of reducing fat, just improve heart and lung function. Night is definitely not suitable. It is suggested that the strength and aerobic time should be raised for 30 minutes every other day, warmed up for 5 minutes, normal 15 minutes and relaxed for 5 minutes. Next, talk about muscle gain. I don't think it's good to gain weight, whether you are a man or a woman. For thin people, eating is as important as practicing. Your body's metabolism is very fast, so you can eat as freely as possible. High-carbon, water and hot food are fine, and then you practice. Thin people come out quickly. As long as you can train and work hard in the health club system, you will soon have a good figure. Unlike me, I run hard every day to lose fat.