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(_tim @ Feb. 24 2010,6:07)</div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE">There's no doubt that you've developed serious credibility with your lifting, Mike. I agree with your assessment as to what good squat form is. I personally am a stickler for rep speed as well; that was pounded into me early on and again as recently as about a year back when I trained with a local strength coach. I've seen a couple guys wreck their backs and knees simultaneously when trying to manipulate the bounce to get a load moving. One guy actually blew out his left knee - and technically speaking, he followed the rules of form that you laid out above. I have no doubt in my mind that a tremendous number of people reading our respective banter will choose a side, and that's perfectly fine. I'm writing from what I've seen and what I've been taught - that's all. The best thing about this addiction is that there are more than one way to get to the same end. This is no different. I'll be less harsh on this particular subject going forward - I truly didn't mean to stir up any sort of question about your credibility.</div>
Tim, you are a very cool guy, I will never take a disagreement between us and turn it into some kind of war of words or hostility.
To be honest, I don't know what the answer is here. I suspect a non-bounce probably IS safer on the knees, though in terms of gaining strength, if I were forced to vote, I would guess it would either make no practical difference, or possibly
slightly hurt relative to a "natural" speed with those conditions met.
Example, that dude John Broz trains worked himself up to like a 770 bounced squat with a pretty fast turnaround (dare I say faster than mine):
http://www.youtube.com/watch?v=3xFm9q1HBKY
Now, there's no way in hell he could pause that weight. However, how about like 650, or 600? We would probably both agree he could do that.
So, imho, strength will tend to scale exactly like that - if you raise your top squat #'s in halfway reasonable form, even if things get a bit ballistic, your "absolutely perfect cadence and/or paused form" goes along for the ride, it's simply never as high. Maybe it's 85% or 90% or whatever, and that relationship will tend to hold over time as you get stronger.
On the flip side, if you don't actively practice the bounce, it's my experience that you kind of lose the ability to do so, i.e. there is an actual "skill" in redirecting those forces, and this skill needs practice. So in terms of competition aspirations or moving as much weight as possible, obviously, you'd want to practice this bounce.
Where does that leave us? Well, I dunno - I can see an argument for keeping a brief pause for most things, as I doubt it will hurt your strength accrual much, and might be a little safer. On the flip side, letting form be "natural" after considerations are met for basic safety seems to give you more leeway to accomodating things for yourself. What the bro's call "making it work for you."
I.e. as the going gets tough, a person will "naturally" add a little more bounce. This, in a sense, allows a spontaneous change in form that allows you to literally do more reps or lift more weight, which you could argue actually INCREASES the stimulus relative to not having done so. I.e. setting too many limitations on "acceptable" form, in a way, doesn't give you the ability to modify things in a way which might actually increase the stimulus. I think that's the danger of the HIT-ish mindset of becoming TOO focused on cadence.
When I trained people, I did want to see control, but I think a too-fast eccentric, by definition, will almost always show up as "bad form" in something other than how fast you're descending. Knees cave in, hips shoot, back position is lost, etc. I think keeping THAT stuff constant is arguably more important, both for safety and for getting the most out of it, and as long as that's in place, not worrying too much about the minutia.