I recently went on a flute course, and I was sitting in a class run by Sarah Newbold who is a teacher at Guildhall and she said that I use my shoulder too much when holding the flute. I think she meant that instead of lifting my flute up from my elbows, I was twisting with my shoulder. I often do get arm/shoulder pain though so is there anyway to rectify how I hold my flute.
Another teacher said I had good posture, but my knees were locked. This doesn't affect me but do you really have to bend your knees when you play?
Thanks!