I have used a float tube and used it in a creek once but it was a while back and i think it would help as far as your back as long as the current isnt too strong. Swim fins are used to move you around and best i remember thats what will wear you out and maybe affect your back. There is another type float tube that keeps you out of water that paddles are used to move you around--that might be the way for you to go. Hope this info helps with your decision some. Later jc