Don't you just want to have strength and strength? It's too easy for me now. I used to be thin, maybe like you, and I never went to the gym to practice. I can share my fitness experience with you. I exercise twice a week (because it takes 2-3 days for muscles to get enough rest, but every exercise should be treated with a masochistic attitude, and I won't give up until I have no strength), then I take a hot bath and sleep (which can reduce muscle pain the next day). I exercise on Thursday and Sunday nights (I still keep this habit). Be sure to warm up before exercise (hands, feet, head and waist should be equipped). I used to basically pull 20 pull-ups to get myself into the state, and then do 4-5 pull-ups in groups of 25, with a rest time of about 10 minutes. After resting for 20 minutes, do handstand flexion and extension (you have to learn handstand first. It's not difficult to learn. You can practice against the wall every night and learn it in a week. This exercise refers to supporting the weight of the whole body with your hands after handstand, and then bending your elbows straight. This exercise can exercise the perfect deltoid muscle. ) I do 3 groups and 20 groups. Then rest for 20 minutes (during this period, I usually eat high-protein food to supplement energy, such as beef jerky, dried bean curd, milk and so on. Finally, I do (3-4) push-ups in groups of (50-70). I put my feet on the bed, my feet are higher than my head, which is a little more difficult, but the effect is better and I can exercise my chest muscles more comprehensively. If you can do as I say, the strength and muscles will be yours in three months. But remember, don't run or do manual labor the day after exercise. Eat more nutritious food. I wish you success!