According to the public relations report of the International Federation of Powerlifting and Wrestling, the muscles involved in the movement of the shaft are: biceps brachii muscle, wrist and forearm flexor muscles and finger muscles Anterior brachialis, triceps brachii and triceps ulna are small and large pectoral muscles, trapezius and axillary muscles are biceps brachialis. The influence of desire in these muscles causes the nerves to coordinate with the muscles and increase the speed of transmission. Very heavy spans can tear the tendons of the scapula.
