Both portions insert along the of the femur (the rough, longitudinal ridge on the back of the thigh bone), the medial supracondylar line, and the adductor tubercle of the femur (a small bump just above the medial knee joint).
Because the posterior part functions like a hamstring, it can sometimes be strained during sprinting or heavy lifting, mimicking a hamstring injury. adductor magnus muscle
Depending on the position of the leg, it can assist in both internal and external rotation of the hip. Both portions insert along the of the femur