The pectoralis major muscle is the main showstopper, attaching from your sternum, collar bone and a little bit of the abdomen to your upper

The latissimus dorsi or lat is a big and strong muscle of the back that climbers love to use. Best worked out with the overhand pull-up, the

The trapezius (trap) muscle has 3 parts: upper, middle, and lower. The upper trap shrugs your shoulders up, the middle trap helps to pinch

The subscapularis muscle is one of the 4 muscles that makes up the infamous rotator cuff in the shoulder. It is the largest and strongest of