So i was reading on EXRX this morning and i came upon something totally new, which doesn't happen often for me in regards to muscle anatomy since I'm pretty interested in it.
My adductors (or so I thought) would get ferociously sore my first time squatting after a layoff from them for whatever reason (lazy, hip scope, whatever) so I always assumed that squats hit adductors.
Well, THEY DON'T. They hit Adductor Magnus, but the other two do nothing according to EXRX. They aren't involved in hip extension, but rather hip flexion. This will explain why big nasties who only squat will be humbled by the hip adduction machine. Two thirds of your hip adductors are out of shape. All of the adductors (hence their name) adduct the hip, of course.
So bottom line, you either need to incorporate some hip adduction or hip flexion to hit all of your adductors. I thought people might like to know.