Hip/Knee mobilization from Seated Leg Work
This exercise works internal and external rotation of the hip joints. I've thought about this alot and while I am biased, I'm willing to say that no other exercise method specifically works with the rotations of the hip join anywhere near as thoroughly as GYROTONIC® training, especially internal rotation. In traditional fitness/strength/weight training it's pretty close to non-existent. External rotation will be specifically used in yoga, based on standing or sitting asanas but I don't know of any asanas that work the internal rotators. There may be a bit in pilates but I honestly can't say.