Horizontal Flexion (Adduction)
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Drawing the humerus from the side-horizontal to the front-horizontal position.
Detail
Horizontal flexion (also called horizontal adduction) is movement of the humerus from the side-horizontal position to the front-horizontal position. It is the powerful primary action of the pectoralis major and is the main movement trained in pectoral exercises. Source attributes the movement terminology to Thompson (1989).
Key facts
- Horizontal flexion / horizontal adduction = humerus moved from side-horizontal to front-horizontal.
- It is the primary movement of pectoral training and a powerful action of the pectoralis major.
Connections
- Horizontal Extension (Abduction) — the return / opposite movement.
- Pectoralis Major — primary producer of horizontal adduction.
- Anterior Deltoid — also performs horizontal adduction (flexion).
Sources
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