Same thing....accomodated resistance. As you descend in a squat the chains are touching the floor, as you get lower, there's more and more chain on the floor that you don't have to support. The weight gets HEAVIER as you stand up...just like the tension increases as you stand up with the bands. So you have to work to push throught the lock out portion of the lift. Same for benching with chains; you have to work to lock it out.