Answer) To adduct the femur toward the midline is the main function of the adductor muscles, but they also assist hip flexion and extension. The main reason for the development of any groin injuries is because of poor tissue quality through this area. What happens is that the adductors become fibrotic and develop adhesions because they are weak or overworked.The adductor longus in the human body is a skeletal muscle and this muscle is located in the thigh. One of the adductor muscles of the hip, the main function of this muscle is to adduct the thigh and it is innervated by the obturator nerve. This muscle forms the medial wall of the femoral triangle.