But I'm asking why you do it.

Keeping your upper-back straight isn't a sign of good or bad form.

^^

explain more m8.

You're confusing the thoracic with the lumbar. Rounding of the thoracic spine is very normal during deadlifts and has no implication on spine safety.

The only implication arising from rounding at the thoracic would be locking it out afterwards (if you have a weak upper-back).

You straighten your knee quicker than you should (Before the bar has surpassed most of the knee below the patellar joint), putting nearly all strain on your erector spinae + quadratus lumborum. This isn't uncommon though.
At your 3rd repetition it showed clearly how the aformentioned problem causes the back to become overloaded (A second in which the back cannot handle the weight shift, and actually descends instead of maintaining elevation).

You don't need explanation on the eccentric phasing, I believe.

Tell that to Andrew ''wheelchair'' Mcinroy.



yeah it does that when I lift weights little bit too heavy. I'd say around 90%. Fortunately for my I will not clean weights anywhere close to this

This post was edited by Aube on Jan 31 2013 11:17pm

I don't get it.

500x3 squats today

200x3 for me. I'm almost as strong as you now!!
























Trolololol

Wait what? I remember dat McInroy... wth did he do now?

He had some pretty backsnappity deadlifts