Biomechanics Module 3-Muscles to Know

Psoas

- Hip flexion
- Flexing the trunk on the femur (fixed thigh)
- Increase lordosis
- Lateral flexion of the trunk (unilateral movement)
- Assists in hip lateral rotation

Rectus Femoris

- Knee extension
- Hip flexion
- Pelvis forward rotation (With the thigh fixed

Gluteus Maximus

- Hip extension
- Hip external rotation
- Back extension at the hip joint (fixated thigh)
- Pelvis backward rotation (fixated thigh and back)
- The lateral fibers assists in hip abduction
- The medial fibers assists in hip adduction

Gluteus Medius

-hip abduction