Soccer, dirt biking and seemingly banging my hard-hat into every low slung pipe in the plant knocks me around a fair bit. My neck seizes up and my lower back starts spasming. I go to a Bowen practitioner, which wiki pretty much describes as quackery. If so, its my kinda quackery. The old lady who looks after me describes it as putting the information bundles back in the channels in the muscles and tendons that were created for them. Its gentle, but effective. Dunno if there's an equivalent up your way but i'd recommend looking into it at least. Chiropractors try and fix everything with one yank in my experience, and that ain't for me.