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Muscles > Shoulders

Location Surrounding the shoulder joint to the front, back, and side
Action Lift the arms up to the front and side, and pull the upper arms back
Other names Delts, Deltoids
Notes The shoulder is a very mobile joint, allowing a wide variety of movements. The deltoids work together and with other muscles to move the arm through an almost 360 degrees range of motion.

Because of the shoulder's versatility, injuries in this area are common among those who train intensely with weights. Poor exercise technique or overtraining can result in painful inflammation of the connective tissues, which should be treated to prevent degeneration and loss of movement

Muscles in this group