squats are suposto be terrible for your spine, and just over all bone structure. I had a back problem for a while, come to find out one of my legs was a bit longer then the other so it threw my hips off, and as a result my spine isn’t straight now because it had to compensate for the bend. anyhow i went to a specialist over the summer in Seattle, he was an orthopedics/what ever doctor, i forget what its called. He said squats are the worst thing you can do for your body, your spine was never built with the intent of holding 500+ extra pounds on it. it can crush vertebrae’s pinch nerves, slip disks, rupture disks, cause rib problems, and its not one of the safest lifts by a long shot, if you loose it its gonna roll down your back and hit every vertebrae on the way down. personally I’ve seen it happen on a number of occasions.