Okay.. Everytime I wash the vehicles(I have to), my lower back starts KILLING me. I can barely walk. Besides losing weight (working on it).. What can I do? I dont think pain killers do much for it. Only thing that makes it better is marijuana, but I can't just smoke that everytime I have a back ache (Well I guess I could, but I wont)... Anything else I can do? Its my lower back. Any excercies that might.. (Strenthen?) it? Any thing I can do