The pectoralis majoris the largest of the chest muscles. It’s thick, fan-shaped, and found just under the breast tissue. It serves as the prime mover when performing a push-up. T… See more

The pectoralis minoris a lesser-known muscle of the chest. It’s significantly smaller in size and lies under the pectoralis major. This small triangle-shaped muscle originates fr… See more

The triceps, formally known as the triceps brachii, is a large, thick muscle located on the back of your upper arm. The prefix “tri” refers to the three heads that form this important p… See more

The deltoidsare the large, triangular-shaped muscles located on top of the shoulder joints. Like the triceps, these powerful muscles are made up of three distinct heads — th… See more