Check crank arm's suspension to see how long it lasts. It usually takes 3 minutes to pass. Check the boom buckling, see the number and degree of arm buckling, and set the passing standard. For example, the human body is up to the maximum, and adults do 5 to pass. Half-flexion should be around 20 to pass. In the implementation of the new Military Sports Training Program, it is necessary to hang the arm for 30 seconds, which is especially important for muscle strength. This way exercises the strength of upper limb flexors and shoulder and back muscles.

Precautions for double-arm suspension

When hanging, the shoulder strap is pulled by weight, so that the shoulder deltoid muscle, pectoralis major muscle and other shoulder strap muscles contract under certain gravity traction, and the muscle strength is gradually enhanced. The biceps brachii and triceps brachii of the upper arm, the extensor and flexor muscles of the forearm, and even many small and medium-sized muscles of the wrist, fingers and palm are in the activities of being pulled and forced to contract to bear the weight. This kind of traction training of shoulders and upper limbs can obviously enhance the muscle strength of shoulder straps, upper limbs and hands.

The ground of the selected field should be land or grass to prevent wrestling. Then get ready: do some calisthenics to fully stretch the large muscle groups and joints of the whole body, especially the joints of the upper limbs such as shoulders, elbows, wrists and fingers, so as to adapt to the upcoming practice of grasping the horizontal bar and hanging the limbs.