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 focus on the muscles that flex the elbow – biceps, brachii, brachialis and brachioradialis – and on the triceps brachii, which extends the elbow.
Because the shoulder and arm muscles also work during exercises for other muscle groups, you should allow time for rest and recovery between workouts to avoid fatigue and overload. The posterior deltoid and rotator cuff are extra sensitive, so pay sufficient attention to this.