I hope you are one of the lucky musicians who never have to deal with a serious injury. It is very scary and sometimes the injury is invisible and professionals are not sure how to help you. This book by Janet Horvath will not only help you once you have an injury but also will give ways to avoid injury in the first place. You might also find her website helpful.
Musicians are athletes too, we just use smaller muscle groups. Stay healthy and stay happy and stay playing!