Hip flexors

In human anatomy, the hip flexors are a group of skeletal muscles that act to flex the femur onto the lumbo-pelvic complex, i.e. "pull the knee upward".

The hip flexors are considered to be the most important muscle in the running process.fact|date=October 2008

The hip flexors are (in order of importance to the action of flexing the hip joint):Platzer (2004), p 246]

*Collectively known as the Iliopsoas or inner hip muscles:
** Psoas major
** Psoas minor
** Iliacus muscle

*Anterior compartment of thigh
** Rectus femoris. (Part of the Quadriceps.)
** Sartorius

* One of the gluteal muscles:
** Tensor fasciae latae

* Medial compartment of thigh
** Pectineus
** Adductor longus
** Adductor brevis
** Gracilis

Without the iliopsoas muscles, flexion in sitting position is not possible across the horizontal plane.

Notes

References

* cite book
title = Color Atlas of Human Anatomy, Vol 1: Locomotor system
first = Werner | last = Platzer
edition = 5th | publisher = Thieme
isbn = 3-13-533305-1 | year = 2004 (ISBN for the Americas 1-58890-159-9.)

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