First, hold the strap in your hand, and then wrap it around the barbell bar or pull-up bar. Hold the belt wrapped around the rod with one hand and turn it. Wrap it tight, okay. Your partner will help you at first, and then you can finish it with one hand. The winding direction of the power-assisted belt should be opposite to that of the fingers. The inner side of the bell pole is wound with the power-assisted belt, and the outer side holds the power-assisted belt with the palm of your hand, so that the friction forces of the two cancel each other out, thus reducing the requirements for grasping force. Never go back, it will get twice the result with half the effort. Personally, I think it is better to pull down, such as pull-ups along the tie, but it is more important. As I said upstairs, pull-ups such as hard pull are tied backwards. Personal feelings, don't spray if you don't like it. If you wear your hand through the belt, put the ring on your wrist and tie a dumbbell or horizontal bar (pull-ups) at the other end. If it is not particularly heavy, it is not recommended to use the grip frequently for a long time. Your grip is getting weaker and weaker! There is also hard pull (back pull). If it is heavy, it is recommended to use it with a belt!