Originally Posted by
Brodie Butland
Yeah, we've got some problems. I'm going to focus on the major ones, with the hope that we can iron out the minor ones later.
(1) Back extension basically doesn't exist. You overextend your spine in the top half of the movement, and lose lumbar extension in the bottom half. That's why your bar path is all over the place and your knees are shooting forward at the bottom.
We want a NEUTRAL spine. To illustrate, find a mirror and stand sideways with no shirt on. Extend your lower back only...you should see your pelvis tilt back but your torso remain stationary. This is overextension, and we don't want that. Now contract your abdominals isometrically, then extend your lower back...you should feel your lower back extensors contract hard, but your lower back should remain close to the position it was at the beginning. This is neutral extension, and it's what we want in the squat and deadlift.
tl; dr - Hold your back in neutral extension through the movement.
(2) You're breaking at the hips first, then breaking at the knees. They should break at the same time, plant your knees at their final location in the first 1/3 to 1/2 of the descent, and then keep them there for the remainder of the movement.
Also, where is the TUBOW located relative to your toes? Where does the book say it should be located?
(3) Stop reaching for depth at the bottom. Hit depth and drive up. You shouldn't be slowing down as you approach the bottom.
Try incorporating these and we'll go from there.