lower body muscle actions

adductor brevis

hip adduction and flexion

adductor longus

hip adduction

adductor magnus

hip adduction and extension

biceps femoris

hip extension and knee flexion, external rotation with flexed knee

gastrocnemius

ankle plantarflexion, some knee flexion

gluteus maximus

hip extension and external rotation

gluteus medius

hip abduction and internal rotation

gluteus minimus

hip abduction and internal rotation

gracilis

hip adduction, knee flexion

iliopsoas

hip flexion

pectineus

hip adduction and flexion

peroneals

ankle eversion, assists in plantarflexion

piriformis

hip external rotation, abduction with flexed hip

quadratus femoris

hip external rotation, assists in hip adduction

rectus femoris

knee extension, hip flexion

sartorius

hip flexion and external rotation, knee flexion

semitendinosus

hip extension and knee flexion, internal rotation with flexed knee

semimembranosus

hip extension and knee flexion, internal rotation with flexed knee

soleus

ankle plantarflexion

tensor fasciae latae

hip flexion, abduction, and internal rotation

tibialis anterior

ankle dorsiflexion and inversion

tibialis posterior

ankle plantarflexion and inversion, support medial longitudinal arch

vastus intermedius

knee extension

vastus lateralis

knee extension

vastus medialis

knee extension