Strong chest muscles improve posture, support breathing and protect the shoulders against injuries. The pectoralis major muscle is the most important pectoral muscle. Other muscles include the pectoralis minor (pectoralis minor), the anterior dentate muscle (serratus anterior) and the intercostal muscles (intercostalis). The main movements of the pectoralis major are flexion, adubtion and internal (or medial) rotation of the arm. It is also a supporting muscle for breathing.
Most pectoral exercises are based on pushing movements and use the triceps and detoid muscles (delta muscles) as supporting muscles. Athletes who train their chest muscles can throw further and more powerfully and are better able to push away, overpower and wrestle with opponents.