Bodybuilders, not surprisingly, are very prone to injury. When lifting a 100-pound weight, it's hard to remember and to think about maintaining perfect posture since there are more pressing problems at hand (literally).
But forgetting to keep your posture correct means injuries and even tearing muscles down the road. So if you recently tore your partial rotator cuff (the most common injury for bodybuilders), check out this video to learn how to rehabilitate it.
Bodybuilders make HORRIBLE patients when it comes to doing physical therapy rehabilitation exercises because we are used to pain.