The lateral deltoid is the one of the three heads of the deltoid muscle. When it is developed, your shoulders appear much broader and more "capped." It functions to raise your arms up at your sides.
On this page, you can find all information you'd want about this muscle. Learn its anatomy, view pictures and discover the best exercises for training it.
Use the table of contents (TOC) on the right to easily navigate through this guide.Outer deltoid (delt)Outer shoulderSide deltoid (delt)Side shoulder
OriginLateral portion of the acromion
InsertionLateral portion of the deltoid
FunctionShoulder abductionTransverse shoulder abductionShoulder flexion^ up to TOC
CableCable Lateral RaiseCable Upright Row
MachineMachine Lateral RaiseBarbell-Machine Upright Row
StretchFixed Bar StretchSide Deltoid Stretch^ up to TOC^ up to TOC
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