Shoulder Rehab and Strengthening

I've read that over 80% of male athletes have shoulder problems and that it is the #1cause of water polo injury. I find that after 20 minutes of shooting with the kids I coach i have to ice my shoulder and have very little range of overhead motion.

Here is the best online PDF I have found for shoulder stretching, strength training, rehab and general information: Pure Power Shoulder

Here are some links I posted previously for Rotator Cuff info: http://www.asmi.org/SportsMed/throwing/thrower10.PDF
http://www.t-nation.com/readTopic.do?id=1053531
id=459683
http://forum.bodybuilding.com/showthread.php?t=529968


You can also find a lot of good information here: http://www.waterpolotraining.net/

One question I have with shoulder stretching is, what is the best way to warm up your shoulder muscles so that you are not stretching cold?

Hope the info helps! Please reply if you have any good resources or info to help water polo players avoid shoulder injuries.