I am no doctor but I can tell you from my experience that it helps to have your balancing foot as central to the mid-line of your body as possible. I picked up a great tip from the teacher today and I am excited about experimenting with it again tomorrow.
Flex your resting ankle and point the toes towards the body. I believe this helps in numerous ways, especially with the alignment of the hips.
Take care, practice patiently, and enjoy 🙂