The pectoralis refers to a group of muscles located in the chest area, primarily consisting of the pectoralis major and pectoralis minor. These muscles play a crucial role in the movement of the shoulder and arm, allowing actions such as pushing, lifting, and rotating the arms. The pectoralis major is the larger muscle, while the pectoralis minor is smaller and lies beneath it. Strengthening the pectoralis muscles is important for overall upper body strength and stability. Exercises like push-ups, bench presses, and chest flies specifically target these muscles. A well-developed pectoralis can enhance athletic performance and improve posture.