Baseball is a very unique game that requires athletes to combine technique and finesse with highly explosive movements. In fact swinging a bat and throwing a ball are among the fastest movements in sports. The ability to produce repeated bouts of explosive power is crucial to the success of of a baseball player. Because a player is required to perform these dynamic movements across a multitude of planes, several muscle groups are activated.
Since throwing a ball is an essential skill for every position, the obvious muscle groups you think of are the shoulder, forearms, biceps, triceps and latissimus dorsi. However, your legs, hip, abs and back are extremely important as those are the muscle groups responsible for generating the explosive power needed to throw a ball, swing a bat, steal bases and chase down fly or ground balls.