Mark Ottobre shows how moving your torso forward during a hip hinge shifts the load onto your glutes and away from your lower back. By changing where gravity pulls, your glutes have to work harder to lift the weight instead of your spine taking the strain.
So all we did was just put your body a bit more forward so the axes, the point of your glutes, had to work a bit harder. Okay. The more we push you that way, the less your glutes are going to be involved. The more we push you forward, as in your body, it's forward. So your glutes were sitting about here, but first set they're sitting about there. So I pushed you forward, that axes point, for you to get up, it is relying upon the glute. This is what I mean by you can't not use your glutes on this because gravity is forcing you to.
