Musicians who are fantastic players as in the super video, and indeed most professionals have ergonomic issues that make ones hair stand on end. And the precise repetitive finger/hand work can cause muscle Wikipedia reference-linkdystonia. The problems can be bad enough to end careers. Is the expert and physio really expert at treating and advising musicians problems? Some people seem to get away with doing things "all wrong" for ever and have few problems and some don't. As in any specialist hobby or sport. There are physios and Alexander Teachers involved in treating musicians at music acadamies. See what you can find for more information. I think I have a contact in the Manchester area but start looking around where you are.