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Anatomy
Anatomy
Horizontal Flexion (Adduction)
Evidence-grounded — sourced from Fysiqal's fitness knowledge graph· 1 min read
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In one line
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).
SourceReference manual
p.132p.708p.728
Cited authorities in source: Thompson (1989).
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.
Explore related topics
Atlas Connections
Anterior Deltoid
The front deltoid head; produces forward flexion, horizontal adduction, and internal rotation — primarily a pressing muscle.Horizontal Extension (Abduction)Closely related
Returning the humerus from the front-horizontal position back to the side-horizontal position.Pectoralis Major
The chest muscle (clavicular and sternal portions); its primary action is horizontal adduction (flexion) of the arm — a powerful action.