Alright, first off, we need to know what you just got to make sure that everything is correct. What kind of UVB bulb, what kind of calcium and vits, what size tank is he in, whats his substrate, whats his basking temp, and how many crickets do you feed him a day( How big of crickets?)
More than likely he has MBD ( Bone disease do to improper husbandry) Does he twitch at all? A year without any supplements or light is a LONG time to be without any, and if you got him from a pet store its likely that he has never had the right things. I highly recommend you take him a good reptile vet, they can give him things to speed up the recovery process and also check for parasites if you have a fecal done ( Which I also highly recommend if you got him from a pet store, or any of his supplies) - Matt