An overhead press machine works many muscles in your upper body, including your shoulders, triceps, chest, upper back, and core:
Deltoids
The main muscles used in the overhead press, with all three parts of the deltoid engaged: front, back, and side. The deltoids are responsible for lifting your arms overhead.
Triceps
Located on the back of your upper arm, the triceps work with the deltoids to extend your elbows.
Pectoralis major
A primary mover in the overhead press, the pectoralis major's main function is to flex the shoulder.
Trapezius
Located in your upper back, the trapezius works with the serratus anterior to rotate your scapula upward, which is important for overhead lifting.
Core
The overhead press also activates your core muscles.
The overhead press is a full upper body workout that can help increase muscle mass
