Hello, first of all, talk about the back. Usually when we make a training plan, we will divide the back into thickness and width, or into upper back, middle back and lower back. To some extent, it can even be said that it is the most difficult part to practice. It's definitely not easy to really practice your back. The reason is that the nerve distribution in the back is too scattered. It can be said that the back of the whole upper body is completely dorsal muscle, with only a little trapezius muscle and back shoulder, which is a large part of the muscle group in the human body and is as important as the thigh. During back training, it is difficult for many friends to find the feeling of congestion. Finally, the arm is basically congested and tired at both ends, but the back muscles are not obvious.

I hope I can help you, thank you!