I have an inversion table which helps me with a uterine prolapse. It is a healthy activity to do for oneself! I have some tips for doing it correctly as I learned the hard way. I see a somatic therapist...he's a sports therapist who does muscle releases and some adjustments as well and he's given me some rules. I helped myself at first but also hurt myself. When I first started using the table I went pretty gung ho with it and was also doing the twisting moving while upside down that I saw on the you tube videos. That was a mistake!!
*When you go to the upside down too fast you increase the blood flow to your brain too quickly. I had headaches for a few weeks (until Leno fixed me so I don't know how long it would've been that way without intervention) because the blood flow to my head was more then my vessels were ready for.
*Leno said that when I go upside down to only stay there momentarily as the pressure is too great to stay there too long...especially when starting out.
*I am NOT to twist or move my spine when upside down or going in that direction. The twisting I did in the beginning did something in my hip area that really hurt. (perhaps this is what people do that don't have success with the table)
*Now when I use the table past horizontal (and I agree with whomever said you don't have to go upside down to feel benefits) my husband is there at my feet. He controls the decent (very slowly to adjust), brings me upside down then slowly brings me back up until I'm able to hold myself in position without any strain to my spine.
I bought a $99 table from Big 5 on a Sunday Deal. I haven't used it for awhile because I had a problem with it. I don't think you need an expensive model but do make sure you like the way the feet click in and the stops for the decent. The table paid off pretty quick for me as it delayed my visit to Leno for a few weeks. I'm using it this weekend in hopes of delaying another visit.
Good luck and enjoy!