The location I go to in central Florida I have confidence in, they are right there with me, spotting me and checking my positioning during each session. There haven’t been any issues at least at that one. I did get clearance from doc before I started and I was very anxious at first, it was only 4 months since I’d fractured L4&5. They started me out very very cautiously, and I am gradually getting stronger. Of course I would check w your doctor that you trust, but at least go to your Osteostrong location and have them show you the machines and explain the process. Then decide for yourself!