Originally Posted by Eric Chapman
On Matt "KROC" Kroczaleski's youtube channel someone asked, "Why do you drop the weight like that after every rep? Why dont you lower it in a controlled fashion?"
Matt responded, "Because in a powerlifting meet you pull a max single from a dead stop, there is no down movement so you don't benefit from the stretch reflex of lowering the weight. By not providing any resistance on the way down I am attempting to simulate competition conditions and eliminate the stretch reflex as much as possible."
That seems like one good reason to me for dropping dl's.
Again, he's probably pulling 700-800lbs which imparts a bit more stress on his body than the average CFers deadlift. There's also no stretch-reflex if you take a slight break to regrip and breathe for each subsequent rep. I can pull a heavy set of 5, lower each under control, and still pull reps 2-5 from a dead stop. All that means is that I'm not bouncing the reps.