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| | AbcBodybuilding |
 | | The hip external rotators of the back leg (piriformis; superior and inferior gemellus; obturator internus and externus; quadratus femoris; gluteus maximus; and adductor longus, brevis, and magnus) contract eccentrically to control hip internal rotation as the knee is flexed toward the floor and are activated concentrically during the upward phase to the starting position (4). |
 | | Barbell lunges are a multi-joint exercise (6) that incorporates a plethora of muscles, including, predominantly, the Gluteus maximus, and also the iliopsoas, quadriceps (vastus lateralis, vastus intermedius, vastus medialis, rectus femoris), hamstrings (semimembranosus, semitendinosus, biceps femoris), soleus, and gastrocnemius. |
 | | While the gluteus maximus works to activate hip extension, the primary purpose of the gluteus medius is abduction of the hip. |
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