Delts
Delts is a common abbreviation for the deltoid muscles, which are the muscles forming the rounded contour of the shoulder. These muscles are crucial for shoulder movement and stability. The deltoid is a large, triangular muscle located at the very top of the arm and the side of the shoulder. It is comprised of three distinct sections, or heads: the anterior (front) deltoid, the lateral (side) deltoid, and the posterior (rear) deltoid. Each head originates from a different part of the scapula (shoulder blade) and clavicle (collarbone) and inserts onto the humerus (upper arm bone).
The anterior deltoid is primarily responsible for flexing the arm at the shoulder, meaning it helps lift