http://www.astym.com/professionals/whyastym.asp
got this done today by my physical therapist...he got certified last week...so i'm being a guinea pig

apparently it's above and beyond the graston technique...as that only treats the area that's symptomatic....whereas astym treats the whole kinetic chain of the affected area. so for my bicep problem...we treated my forearms, my hands, biceps, triceps, all the delts, all the rotator cuff muscles, all 3 traps, rhomboids, levator scap, and pecs. i'm red, bruised, and smelling like cocoa butter.
gonna do a couple more sessions and see how it works out. it's kinda fun feeling all the gristle you have in your muscles that isn't supposed to be there