The shoulder exercises in this section target the deltoid muscle. The three parts of this muscle generate force, while the rotator cuff provides dynamic stability and allows movement around the shoulder joint (glenohumeral joint). Strong, stable arms and shoulders are good for many sports. The arm exercises target the muscles that flex the elbow—biceps, brachii, brachialis, and brachioradialis—and the triceps brachii, which extends the elbow.
Because the shoulder and arm muscles also work for other muscle groups during exercises, allow time for rest and recovery between workouts to avoid fatigue and overexertion. The posterior deltoid and rotator cuff are extra sensitive, so pay close attention to them.