I have suffered from back pain due to a slipped disc and inflamed psoas for about a year I tried everything chiro, massages, phys therapy, etc. and nothing really worked then I started using an inversion table in December, bottom line I haven't had any back pain since.
I've even had the weirdest strength increase since, again for a year my deads were stuck at a particular weight which I could do for 8 reps and if I even increased the weight by 5 pounds with a couple of spacers I absolutely couldn't move it. Well since using the table at my gym trying to stay on for about fifteen minutes every other day or so my deads max has gone up by about 130 pounds which is finally back to what I was doing before I slipped my disc.
At first I would do about three 5 minute intervals with stretching in between because It hurt my ankles for a while but it eventually got easier and my goal is to hang for 15 minutes every other day.