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Abduction is a movement of a body part away from the median plane of the body (think someone raising their leg or arm away from their side). Adduction is just the opposite, meaning movement of a body part toward the median plane of the body.
The hip adductor muscles are the antagonists to the glutues medius. Hip abduction involves the contraction of the gluteus medius, causing a smooth lateral abduction of the lower extremity away from the body. âAn altered hip abduction movementâ is any change in this movement.he three muscles are the gluteus maximus(primary mover/agonist), biceps femoris(synergist) and erector spinae(synergist). Any deviation from the specific muscle activation is considered an altered movement pattern. This will cause hip extension dysfunction, muscle imbalance, pain and contribute to changes in posture.