Actually I have the role already länger..aber as is so it was more in the corner than on my back ... but the last few days I use it every morning and evening. Why =? I've been suffering for months from backache. Well what I should I sagen..seitdem use them it will get better with my back. The role seems to slow the bonds and the trigger points in the back to lösen..Also says stay tuned. Even at the gym the roles are unremarkable in the Ecke..aber yes. You really helps !!