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Hip and Knee Muscles
| Muscle | Action | Prime Mover |
|---|---|---|
| sartorius (longest muscle) | hip flexion/abduction/ER; knee flexion | hip ER |
| adductor magnus | hip adduction/ER | hip adduction |
| adductor longus | hip adduction/flexion/ER | |
| gluteus maximus | hip extension (esp. w/ knee flexed)/ ER | hip extension |
| gluteus medius | hip abduction/IR | hip abduction |
| gluteus minimus | hip abduction/IR | hip IR |
| quadriceps | hip flexion (w/ SLR)/ Knee extensions | knee ext. |
| vastus lateralis; vastus intermedius; vastus medialis | knee extension (vastus medialis- last 10-15 degrees) | |
| biceps femoris | knee flexion | |
| semitendinosis; semimembranosis | knee flexion; hip extensions (w/ knee extended) | |
| Hamstrings | Knee Flexion | Antagonist to quads |
| iliopsoas (psoas major & iliacus) | hip flexion | hip flexion |