Anterior Deltoid
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The front deltoid head; produces forward flexion, horizontal adduction, and internal rotation — primarily a pressing muscle.
Detail
The anterior deltoid's functions are: (1) forward flexion (raising the arm overhead), (2) horizontal adduction (flexion), and (3) internal rotation. Exercises include shoulder/military presses and front dumbbell raises. It is subject to an over-used syndrome and is primarily involved in pressing movements. Positioning the upper arm 45 degrees away from the torso is an important safety factor to prevent subluxation of the shoulder joint. Use of a neutral grip is a more functional movement to train this muscle.
Key facts
- Functions: forward flexion (arm overhead); horizontal adduction (flexion); internal rotation.
- Primarily a pressing muscle (prone to over-use syndrome).
- Safety: keep the upper arm ~45° from the torso to prevent shoulder subluxation.
- Neutral grip is more functional for training it.
Connections
- deltoids — group it belongs to.
- horizontal-flexion-adduction — one of its actions.
- internal-rotation — one of its actions.
- deltoid-rotation-cautions — 45° arm positioning.
- military-press / front-raise — training exercises.
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.