I would like to get back into exercising more, however I'm concerned with how my cranium will handle it, because it's still healing from having a tumor removed in 08/11. I do walk, but I did more before the tumor was diagnosed. My neurosurgeon doesn't address anything that he doesn't seem to think is his field. My chiropractor says walk, walk, walk. Which is ok, but with the weather getting colder, I can't tolerate outside much.