First, the arm strength device is useful. Arm strength device, also called grip strength stick, mainly exercises arm strength and chest muscle, arm muscle and wrist strength.

Second, how to use the arm exerciser.

1, hold your chest flat. Hold the arm with both hands, bend slightly, and bend the arm inward with your wrist.

2, behind the waist. Put the arm stick behind your back with one hand, and then hold the other end of the arm stick with the other. Finally, the arms are round and the arm sticks are bent hard.

3. Behind the neck. Put the arm stick behind your neck, lean your head forward slightly, and hold the stick with your hands down or up.

4. Hold hands backwards. Hold the arm stick with both hands, so that the palms are inward, and the fists are clenched counterclockwise.

5. Close range. Hold the arm with both hands clenched and put your hands inward.