Originally Posted by
Pete Troupos
Some weight on the bar will help next time. An empty bar isn't very useful for determining a great deal most of the time.
Narrow your stance up so your heels are under your shoulders.
Your elbows are definitely cranked up. This is related to the upper back being rounded. Lift your chest before each rep and pull the elbows down. They only need to be up enough to trap the bar on your back.
Rather than throw your chest at the ground, send your hips back and bend over at the waist. More hip emphasis on the way up from the bottom.