So while I was in Sam's class today she was doing a "stand with your feet apart" exercise. I caught her attention later and said "It just doesn't work for me, trying to stand like that" and she said "Ah, that's probably because....... you need to do this" which although I didn't have a chance to try did make complete sense to me and I think as that follows on from loads of other advice I have been given that it makes complete sense.