In any physical therapy program for this you will cross-train the muscle (by) doing another activity that strengthens it beyond (what) is needed for daily activity. |
It's difficult to apply critical, scientific methods to determine that a particular action done repetitively over a number of hours will result in injury. |
Repetitive stress is essentially an overuse problem. What happens is you usually end up tearing muscle fibers and they get to a point where they fatigue and, due to the repetitive motion, cannot recover. |