In deadlifts and RDLs (Romanian Deadlifts), the hamstring portion of the AM acts as a synergist. If you feel a deep stretch on the inside of your lower thigh during an RDL, that isn't your hamstring—that is your Adductor Magnus begging for attention. The "Mystery Groin Pull" Most athletes fear the "groin pull." But did you know that most proximal (high) groin pulls are actually tears of the rectus abdominis or the pectineus? Distal (low) groin pain near the knee is often the Adductor Magnus.
To train the hamstring portion (hip extension), you need hip extension with a wide stance. To train the adductor portion (leg adduction), you need resistance pulling you outward. adductor magnus muscle
In sports like hockey, skiing, or even side lunges, you rely on the AM to decelerate your body as you push side to side. It acts as a brake when you plant your foot to cut left or right. In deadlifts and RDLs (Romanian Deadlifts), the hamstring