If your arms get tired or even sore after playing for a little while, you feel like a droopy bow arm is leading to trouble keeping a good tone, or you're working harder than you probably should just keeping your instrument up, this video is for you! As much as we might notice the arms moving and supporting the violin/viola and bow, for stamina, a graceful, confident posture, and as the foundation for all our technique, another set of muscles are well worth our consideration.