Towner I've got a shoulder injury (full dislocation and 3 way break of head of humerous). I have worked at it and now find front crawl easier, I find breathing to the injured side helps (ie, injured shoulder is out of the water not in front). also if you work at front crawl and get the gliding phase going then it's not so hard on the shoulders. It took a long time before I could extend the damaged arm forward far enough to breath with the damaged arm in front, but I did get there and I have a lot less aches and pains and much more mobility in the shoulder. just a thought