
Originally Posted by
Maybach
The bar is too high on your back, and your lower back is in hyperextension at the top.
Notice what happens at the bottom: the bar stops moving, while your hips move down and your knees move forward. This because, in the position to are holding the bar, this is the only way to achieve depth without the bar drifting forward. The same thing happens on the way up: your hips move up without moving the bar, as the moment arm moves from the knees to the hips, but because the bar is in the wrong spot on your back, this causes the bar to "roll" forward, lengthening the moment arm on the hips and making the lift harder. This artifical "sticking point" is probably what is preventing you from reaching depth
Adjust your grip: move the bar down your back about an inch. Keep your elbows down (pointed at your tailbone) and get your upper back in TIGHT. If the bar feels "too low", that means it's probably in the right spot.
Your back also looks like it may be somewhat overextended, which might be contributing to these problems. Move the belt up so it sits in the middle of your belly. There should be an equal about of gut above and below the belt. More below is better, if you have to choose. Think about pulling your pelvis "up and forward" with your brace. Don't think about sticking your butt out