Originally Posted by
Jason Donaldson
Am I thinking correctly that the main reason for this has to do with the fact that you're setting up with so much hip flexion at the bottom of the DL? The squat takes you to (and past) that degree of crowding between the thighs and the torso, but it does so in motion, vs. the DL setup having to wedge into it statically, such that there's no momentum to force everything into position (and rebound off of it, for that matter, especially if one has a belly also contesting for space). The narrower belt therefore intrudes less into the contested region, making DL setup easier to do without compromise.