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« on: April 25, 2012, 10:03:12 PM »
I'm about to get borderline scientific on something that I've been wondering, and even though I'm what you might call a "meathead," I think I can get the basics of my thoughts out there for you smarter folks.
Speed Deadlifting to increase lockout:
In both experience and study, I've found that I perform better using a sumo-stance for deadlifting, which can be attributed to higher mechanical efficiency and the fact that I train squats wide. I made the switch a few months back after I got the loads around 3xBW and noticed that my starting position on the pull wasn't the standard 45-degree angle, and closer to a 15-degree angle, placing a significant level more stress around the L4/L5 (as studied by Cholewicki et al (1991){Medical Science Journal of Sports Exercise. Vol 23}) vertebrae. This relieves a great deal of stress on my back, but has the neuromuscular disadvantage that it's not something that I've worked as speed strength. PCleans tend to carryover to a conventional DL very well, but the changes in hip activation from widening the feet totally change the feng-shui of the lift for me (and since you guys like science...this is backed by (Piper & Waller, 2001) {Strength and Conditioning Journal. Vol 23, No. 3}).
My question starts where I tend to struggle with the lift. With a conventional stance, if the bar would ever leave the floor, I could get it to lockout. The breakdowns were always the start of the conventional pull, or grip issues when attempting multiples above #400. Currently, I really struggle with the last 20% of the lift. Acceleration off of the floor isn't an issue, but I slow down greatly as I approach the final lockout position. As I understand it, the sumo-stance is used to keep the spinal erectors under less load at the beginning of the pull, and the erect position is maintained much more rigidly throughout the entirety of the lift. This would lead me to believe that the top portion of the sumo deadlift should behave much like the top portion of the wide stance squat. As Siff and Verkhoshansky pointed out in Supertraining v. 6, the quarter squat permits higher loads than the half-squat position, and since I don't have an issue with stalling at the top of the squat...I'm assuming that I'm simply not recruiting at the same rate of force development as I would under similar loads in the squat.
That being said, since a PClean doesn't really translate to having your feet about 5' apart, I'm looking at training this using CAT with about 50-60% of my current PR, so double plates+some form of dynamic loading. I know that many of you guys (ahem, Steven!) understand biomechanics better than I do, so what would be the pros and cons of such an attempt?
EDIT: I also am very much convinced that the other possibility is because the weights are just really f***ing heavy and that over time, I'll still be slow at the lockout, but with more weight in my hands. This is generally my answer to everything: "You're just not strong enough yet." So, if I'm over-thinking it, then so be it. Just wondering if the risk v. reward for speed deads makes them worthwhile.