I am not an expert by any means. Whenever I ask these types of questions the answer always seems to be.. "do what feels natural"
This is just a thought, your knee might be hurting because although your body might be twisting, your foot isn't pivoting because it's planted. All that twisting motion might be going into your knee. Have you "angled" your foot and or are you pivoting on the ball of your foot?
Hope this at least gives you something to think about. Good luck.