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Define Your Deltoids

Define Your Deltoids

The deltoid, a muscle on the uppermost part of the arm and top of the shoulder, is basically responsible for the majority of all arm rotation. Properly training the deltoids helps to avoid arm dislocation and injury to the arm. It consists of three different parts - the anterior deltoid, lateral deltoid, posterior deltoid - each of which have different functions that work together. The anterior deltoid rotates the shoulder joint by...

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