In the front arm raise, the humerus is raised forward of the body in flexion. The clavicular portion of the pectoralis major, anterior deltoid, coracobrachialis and the biceps brachii contribute to flexion of the shoulder joint. The corresponding scapula movements are abduction and upward rotation caused by the concentric contraction of the serratus anterior, pectoralis minor and the trapezius. The elbow joint is locked in extension by the static contraction of the triceps and the anconeus.