Exactly, Crossfit, has never, in any circumstance actually, provided any physiological evidence that has ever supported their "methodology", and by physiological evidence I mean training effect, short term and long term. What are the physiological effects, outcomes, adaptations, purpose or reason for anything thing they have ever programmed? Like what is the point of this work out, what is the long term purpose of this workout, physiologically, why is this week setup with workouts this way, why are these exercises assorted this way, why are the movements "couple" or "tripled" this way, why are these weights at this load, what is the reason for doing 30 snatches in a row when you are just catastrophically distorting the technique? Physiologically WHAT IS the purpose? They have never, ever, demonstrated anything remotely close to explaining this or made any attempt to compare what they've do to any other program or with any control. The only thing they provide is: "well, it increases work capacity." WHAT DOES THAT MEAN? Okay, you can finish a workout faster, but WHAT DOES THAT MEAN?!
What does this mean!
What does the power output and joules and watts and horsepower and joules mean anything in relation to physiological adaptations, biological development and performance? What does it mean in for the nervous system, the muscle cells, tendons, bones. How does this relate to RFD, SSC, TUT, cellular metabolics/ bioenergetics etc
One athlete can do a fran in 2:00, and his identical twin can run a 2:00 800 meter; and the 2:00 800 actually has 4 times more power output and work performed in joules. But what the hell does that mean in physio? What do joules and watts mean to the human body? By their own definition, David Rudisha is 7 times fitter than the identical person that does a 1:40 fran.
An athlete can "snatch" 95 pounds 200 times in a row and put up 5 times greater joules, watts, horsepower than his identical twin that can snatch 145 kilograms, but he is definitely not more powerful, though joules and horsepower say so by crossfit's standard.
Its all snake oil, makes zero sense
They aslo have done a really good job with spreading myths and propaganda; a perfect recent example is with that Rhabdo Ben video; and another one is this picture:
I don't know who these athletes are, and I could be wrong on this and should look it up when I have time, but the guy on the left may be a masters level power walker.
Here's Samuel Wanjiru the 2008 olympic champion in the marathon (2:06 [almost half of brian mackenzie's pr])
He's Kenyan, 5'4", 110 pounds and ran 20 miles a day, still has muscle fibers in his legs. If you didn't know most of their diet is maze and tea, and it takes a decade of development to get on this level.
Kara Goucher, long distance American runner, 2:24 marathon (an hour and 20 minutes faster than brian mackenzie's pr), still has muscle fibers
By the way, Arnold Swartz back squated 260kg.
Chinese weightlifters: http://www.youtube.com/watch?v=Eo5N5WMB6oY