I have problems like the rest of you and thought this little cart would solve my problems. It could of been worse. I had both knees operated on several years ago and my doctor told me not to kneel. If I bend now my lower back and coccyx start to hurt so I got his cart took it out and landed up on the ground I guess just a little incline it will tip. I haven't tried it again since. I probably didn't position myself properly. What I am saying is if you are trying something new I would have someone near just in case.