I would like to know about stretches or exercises adult beginners can use to inmprove their flexibility for string playing.
I have a violin student who hand and arm can only rotate about two thirds the way than my arm can. As a result he has to contort his shoulder in order to reach around at all. It was not so obvious in the beginning however when I was introducing vibrato he described a persistent burning sensation. He then tells me that it always burns after a few minutes of playing. He just assumed that the burning was because of 'weakness'. My first thought was "Tension!", so I recommended relaxation exercises. It is when we started doing those that I noticed that he was just inflexible.
I recommended some general stretching exercises that I found on YouTube which did loosen him up a bit. The "persistent burning sensation" is now only there after attempting vibrato exercises for a few minutes. His flexibility has improved a bit in his arm however something is missing. my question is short is this:
What are some exercises for very inflexible violin players to develop flexibility in their arms, hands hand and fingers?