For the past few days, I have been following a very lively discussion on performance injuries (specific attention is given to repetitive motion injuries) on the blog of one of my colleagues, Gretchen Saathoff. Having recovered from her own repetitive motion injury, Gretchen and her readers have raised some interesting points that are thoughtful and informative, representing multiple (and I might add, well-informed) perspectives. Rather than summarizing the discussion, I encourage you to read the blog "Do You Need an Arm Massager?" and the published comments regarding this important topic.
While the discussion is approached from a pianist's slant, it offers insight that is applicable to other instruments as well as those who type for extended periods of time.