I know there are a lot of folks here with back issues...
wondering if anyone's tried any of the above?
The BackJoy Core makes promises that could be quite conducive to riding strength/balance etc., but is about 5x the price of the Relaxobak.
InnisFailte Pinto Sporthorses & Coloured Cobs
Bits are like cats, what's one more? (Petstorejunkie)