What is the deltoid muscle? The deltoid muscle is the big muscle on the shoulder. It has three parts - the front (anterior), middle and back (posterior). The muscle lifts the arm up sideways. The ...

Upper body workouts can often go heavy on the biceps and triceps, but you don't want to shrug off shoulder exercises. Trainers say that a good deltoid muscle workout does more than help you (literally ...

The deltoids are the muscles that cover the front, back and side of the shoulder joint — and they are essential for everyday movements like raising your arms, lifting a child or carrying groceries.

The deltoid is a large muscle responsible for lifting the arm and giving the shoulder its range of motion. Pain in this area may be due to issues like overuse or injury. The deltoid is located in the ...