I've noticed over the years that when pracitcing my scales (or just playing in very high registers) that it is noticeably more difficult to play at the very high or very low registers of the piano. I feel like this is due to having to rock your body so far to the left or right that you sort of lose balance (or, if you don't move your body, then your arms are strained and "winged" out).
Does anyone else experience this? If so, what have you done to correct it or deal with it?
Thanks.