You can get them off Amazon - that is where I got my current roller (I bought that one after a foam roller I bought at the physical therapy place I went started to sag in the middle; the foam just gave up_.
You can use them to stretch, almost massage, several muscles. For me, it is tight IT bands. Wahine, a member of this forum, has a couple of videos showing stretches for the shoulder, thigh and hip: http://www.youtube.com/user/wahinemu...ow=grid&view=0



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