The shoulder is one of the most commonly injured joints. The reason is that the shoulder has more range of motion than any other joint. However, that also means that it is much easier to injure. There are steps that can be taken to strengthen the often neglected tendons, muscles and other connective tissue that comprise the rotator cuff. The following article provides an excellent description of shoulder injuries and how to prevent and rehabilitate from them. http://www.bodybuilding.com/fun/sclark71.htm