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whats are pullthroughs and how you do them

http://www.youtube.com/watch?v=wP-fD_UNXNw

this is an amazing exercise

thanks alot for the help

Damn man. Careful you don't blow out your back.

Guys not really doing them right in the video, imo. But he's bending his legs and although it's gonna put a lot of shear stress on the back it's more likely to result in injury due to cumulative stress doing that for a long time as long as you start out light. But stick enough weight on there and try to jerk it up...yeah you could throw out your back.

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If you act sanctimonious I will just list out your logical fallacies until you get pissed off and spew blasphemous remarks.

^^so eric, whats a pullthrough? ive been doing them in the same fashion...

Well they're all pullthroughs, you know? It's just that there are usually ways of doing things that more closely correspond to the roles of the different muscle groups when you do your basic compound lifts.

I'll try to find a video of what I think is a better way. It's just opinion but I have done them that way in the past and it for sure aggravated my already bad lower back. It should tell you something that I can deadlift well over 400 with no back problems but doing pullthroughs that way with weights that are nothing compared to the deads screwed my back up royally (keep in mind my back is already screwed up).

Okay so there are basically two different versions. The one above is supposed to put more emhasis on the spinal erectors and the way I like is supposed to put more emhasis on the glutes and hams. However, to me the best way to do an assistance exercise is the way that most closely resembles the way you use you muscles in the primary exercises.

I'm sure most people here actually do it like the video above but I don't see a lot of value in isolating the spinal erectors as lifters when that is not really their role. Or at least it shouldn't be if you want to have your back for as long as possible. But if the other way works for people, whatever.

http://www.bsu.edu/webapps2/strength.../gpullthru.mpg

The muslces of the posterior region are viewed as working in a "chain", hence "the posterior chain". If you view them as links in a chain then it should make sense that focusing more on one link over another in a way that puts undue stess on that link may not be the best way. But different things have value for different people and I am not one to say that my way is always the best way.

Keep in mind that I'm speaking in generalities. There are going to be people who, because of the way they are built are going to need relatively stronger lower backs or stronger glutes and hams in order to complete heavy squats or deads. But this does not mean to me that choosing an assistance and performing it in a way that puts you a very different biomechanical postion than when you do the lifts is going to automatically lead to bigger numbers.

oooh....ok sir..i will do