It is normal for a young man like you to be tall and light, but you are very good at detecting this problem. I used to be like you, but now I become strong through exercise. Let me make a few points for your reference: 1. Buy a big dumbbell, about 30 kg, a pair of 200 yuan. 2. Look up a set of dumbbell exercises on the Internet. First of all, dumbbells are only placed in two small plates and gradually increase. The most important thing is persistence, which will benefit you endlessly over time. 3, insist on running every day, the slower the better, half an hour is the best, a little Mao Mao sweat. 4, do push-ups against the wall, you can do it with both hands or one hand, and add it slowly. I believe you must have a good and strong body.