Two summers ago, I tried surfing. After about 6 weeks, my shoulders started hurting so I stopped the surfing thing. I expected them to heal and they just got worse. Over the last 16 months, one shoulder got a little better and the one that wasn't too bad is now the worst one. I can't reach in my jersey pockets without wincing pain. For a while last year, one arm would hurt a little after an hour or so many of riding. Now it doesn't. From everything I've read, this frozen shoulder thing strikes for a good reason or for no reason and can last 2 years. I WILL BE 100% BY THIS SUMMER!