I just want to remind you that overload is correct and possible, but the amount of overload is relatively well controlled. When we are in physical training, it is usually 5 kg plus 1. If we think it's all right, we'll add 10 kg. It is absolutely impossible to say that you usually add 10 or 20 kg a day. Muscles need an adaptation process, otherwise they are easy to strain. If you pull it out, I don't need to say that kind of pain, you should be able to feel it. Barbell, because of many factors, we still do not recommend it. You'd better do squats. This can exercise the strength of the waist and abdomen, can achieve the effect of your clean and jerk barbell, and is relatively safer. Professional squat equipment is auxiliary, that is, for example, you suddenly added 100 today, and you want to try it. As a result, you can't get up, which will definitely hurt, but professional equipment can help you get stuck in the middle and avoid injury. Gyms are full of such equipment. If you clean and jerk the barbell, you will definitely get hurt unless someone is around. There must be some muscle stimulation you mentioned, but remember to do it step by step, don't add a lot at once, or you will risk injury.