Smith Machines are the devil

"Squatting" in a Smith machine is an oxymoron. A squat cannot be performed on a Smith machine, as should be obvious from all previous discussion. Sorry. There is a gigantic difference between a machine that makes the bar path vertical, and a squat that is executed correctly enough to have a vertical bar path. Muscle and skeleton should do the job of keeping the bar path vertical, not grease fittings and floor bolts.

– Mark Rippetoe