Adductor Magnus

Musculus adductor magnus

Lower Body Lower BodyLegsAdductorsHamstringsPosterior Chain

The largest adductor, the adductor magnus is a powerful hip adductor whose hamstring-like ischiocondylar head also extends the hip, earning it the nickname “third hamstring.” It is heavily loaded in deep squats, sumo deadlifts, and wide-stance pulls, contributing substantial force to hip extension out of the bottom position. Its dual innervation reflects its hybrid adductor/extensor role, making it a key but often-neglected driver of posterior-chain strength.

Actions

Hip adduction, Hip extension, Hip flexion (adductor part), Hip medial rotation

Origin

Adductor part: inferior pubic ramus and ischial ramus. Hamstring part: ischial tuberosity.

Insertion

Adductor part: medial lip of the linea aspera and medial supracondylar line. Hamstring part: adductor tubercle of the femur.

Innervation

Adductor part: posterior division of the obturator nerve (L2-L4). Hamstring part: tibial division of the sciatic nerve (L4).

Blood supply

Deep femoral artery (profunda femoris) and obturator artery

Heads

Adductor part (pubofemoral), Hamstring part (ischiocondylar)

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