I have significant back issues. I still have a great time at Disney, but I don't go on any of the rides that I think may hurt my back. I was fine on 7 Dwarfs, Toy Story Mania, Slinky Dog, Peter Pan, Flying Carpets, Navi River Journey, even Soarin'. I used a seat cushion that I brought on the Safari and Jungle Cruise, and then I was ok. I could also go on pretty much any of the rides that young kids can go on (except bumper cars or spinning). I got a lot of info ahead of time by watching YouTube videos of people going on the rides.