It mainly works the Deltoid muscles, but also works the Triceps Brachii and Trapezius.
The popular Bench Press method works, the Pectoral (Pecks) Muscles (Bottom and top), as well as the Shoulder and the third Triceps Muscle.
The superficial muscles of the upper back and shoulder of a frog include the trapezius, deltoid, and latissimus dorsi muscles. These muscles work together to provide support and movement for the frog's forelimbs and shoulder girdle.
The bench press primarily works the pectorals (major/minor), but secondarily develops the triceps brachii (extends elbow), the anterior deltoid (flexes shoulder), and the coracobrachialis (assists shoulder flexion). More emphasis can be placed on secondary musculature by varying body angle and grip.
The muscles used to depress the shoulder girdle include the latissimus dorsi, pectoralis minor, and lower trapezius. These muscles work together to pull the shoulders down and stabilize the shoulder blades.
There are several muscles working when pitching. Starts of with the abductor muscles when striding. leg muscles such as the calf, quads and hamstring work when push of happens. then shoulder girdle, lats and biceps work as arms rotate. Core muscles work for rotation
deltoids are the back shoulder muscles and trapezoids are the muscles around the shoulder/neck/back area
Work out on your shoulders every other day and eat good.
Jumping Jacks can be a fun exercise, and can be easily learned. It uses calve muscles, hip/shoulder abductors, shoulder/his adductors, and the core.
the shoulder muscle extends the arm
Biking gives a good work out of all the muscle groups
Trying to start an exercise habit for life; but you could also work on your triceps, forearm, and shoulder muscles