The stimulation you get from a Zercher squat is quite different than what you get from a front squat. In fact, your front squat numbers may not correlate at all with your Zercher squat. (I can actually Zercher squat 50 pounds more than I can front squat.) The disadvantageous joint angle achieved by the barcradledinarms Zercher position forces you to engage the anterior core and upperback. Couple that with the deadstop off of pins (the "Anderson" part of the movement) and you've got one brutal, quadbruising movement. Oh, and don't pay attention to the keyboard warriors who call Zercher squats dangerous. They're about as wrong as you can get. – Jason Brown