| Muscles |
Actions |
Lever |
Adavntages |
| gracilis | adduction, internal rotation | Type III (II w/knee bent) | high force, high velocity, hybrid ROM and mechanical advantage |
| sartorius | hip and knee flexion, external rotation hip, eternal rotation knee | Type III lever | low force, high velocity, hybrid ROM and mechanical advantage |
| tensor facia latae | internal rotation, abduction, hip flexion | Type III ROM | low force, low velocity, ROM |
| rectus femoris | hip flexion, knee extension | Type III | mechanical advantage, high force, high velocity |
| biceps femoris | hip flexion, knee extension, adduction | Type III | high force, high velocity, ROM |
| semimembranosis | hip flexion, knee extension, external rotation at knee | Type III (II if resistance on femur) | good force, hybrid ROM and mechanical avantage, high velcity |
| semitendinosis | hip extension, knee flexion, internal rotation at knee | Type III (II if resistance at femur) | good force, high velocity, hybrid ROM and mechanical advantage |
| adductor magnus, longus and brevis | adduction, internal rotation, minimal hip flexion and extension (magnus) | Type III | ROM, higher velocity, mechanical advantage and force w/increase in size, |
| gastrocnemius | knee flexion (initiator), plantarflexion | type II (knee flexion), type III (plantarflexion) | mechanical advantage (type II), ROM (type III), high force, high velocity |
| soleus | plantarflexion (esp. knee bent) | type III or type II | high force, high velocity, ROM or mechanical advantage |
| tibialis anterior | dorsiflexion, inversion | type II | mechanical advantage, high force, high veloity |
| iliopsoas | hip flexion, adduction, external rotation | Type III | high force, high velocity, mechanical advantage |
| pectineus | adduction, external and minimal internal rotation | Type III | ROM |
| gluteus maximus | hip extension, adduction, external rotation | Type III | high force, high velocity, ROM |
| gluteus medius and minimus | external and external rotation, abduction | Type III | ROM, moderate force, high velocity |
| hip external rotators | hip external rotation | Type III | ROM, moderate force, low velocity |
| popliteus | knee flexion, internal rotation | Type III | ROM, high force (internal rotation), low velocity |
| peroneus longus and brevis | eversion | type II | high velocity, mechanical avantage, high force |
| peroneus tertius | eversion, dorsiflexion | type II | mechanical advantage, low force and velocity |
| tibialis posterior | inversion, plantarflexion | type II | mechanical advantage, high force, high velocity |
| vastus lateralis | knee extension | type III lever | high force, hybrid, high velocity |
| vastus intermedius | knee extension | type III lever | high force, high velocity, hybrid |
| vastus medialis | knee extension and patellar tracking | type III lever | high force, high velocity, hybrid |
