1. power curling iron: a special tool for developing forearm muscles, which has a good effect on strengthening grip strength. There are two kinds of commonly used winding machines: hand-held winding machines and bracket winding machines.

2. Spring bar: there are wooden handles at both ends and a spring with greater elasticity in the middle, which is used to train the muscles of the upper arm and trunk.

3. Push-up frame: made of iron pipe or wood, which can be used for push-ups with bare hands and waist load. Push-ups have a significant effect on the developed pectoralis major muscle group.

4, bench press: it is a special instrument for practicing pectoralis major. There are three kinds of lying positions, sitting position and vertical position. It consists of a bracket welded with steel pipes and a plate surface. The bench press frame is used to develop the muscles on both sides of pectoralis major, while the bench press frame and vertical press frame are used to develop the upper and lower muscles of pectoralis major.