This is my favorite exercise to start addressing flexibility issues in one of the most important muscle areas for musicians: the tendons of the fingers. It will get you started improving the mobility in this often over-used area.
If Your Music Education Didn't Teach You How to Take Care of Your Body...
The Musician's Maintenance Starter Kit Will. Learn the muscles that matter for musicians. Learn a safe, simple exercise for each muscle. Transform how your body feels while you play in just 5 minutes per day