I have a funny story that is adjacent to this. In my early twenties I used to work out at a place called monster gym. A bunch of CFL players for the Argos used to work out there and some wrestlers would work out there as well when they were in Toronto for a show. I once saw Brian Adams (he was Crush) maxing out the leg press machine with 9 plates on each side. Anyways, there was a Canadian champion bodybuilder who worked out there as well and one day he asks me if he can work in between my sets on the leg extension machine. I said sure and while he did his set I went to the fountain to get a drink of water. I came back and sat in the machine and tried to do a leg extension and the thing wouldn't budge. I thought what's wrong with me I moved this no problem last set totally forgetting the guy was 4x the size of me and probably changed the weight. I looked down at the weights and it was set at max 220lbs. Haha.