I have been using a foam roller for achilles tendonitis, with good results. I have a very soft white foam roller (too soft) and a black high-density one. The black one is good, but I am getting less out of it than I used to. I am wondering whether there is an even more aggressive foam roller I should buy. They have foam rollers with all sorts of bumps and shapes and thingies that supposedly make it work better, but I don't know if that is a bunch of malarkey. Thoughts?