yeah adarq I agree that you shoudn't use LB too much. But w/this exercise Iit is possible to get into a deep squat postion and use mostly the glutes and quads as in normal squat.
MUCH less LB used than deadlift and backsquat, think about it a little bit; the bar is in b/w the legs, directly below the hips (in front of the hips in the running version), which allows me to activate the glutes more than the lower back than in a regular deadlift.
Yeah so in the vid there are 2 versions, a 1 step, and standing. In the 1 step it is easier to not use lower back with proper form. In the standing version it just takes some effort to not get lazy and use the lower back.
I just took a vid of my max attempt at 275, then for the rest of the workout I did 225.
Oh and what freaks me out is, the day after, well for two days after I do this exercise, my glute-activation increases; when I walk up the stairs i feel the burn in my glutes, but usually i tend to walk up with quads more . . . very interesting