Just reread CrossFit Journal on Metabolic Conditioning...

[Derek Weaver]

Originally Posted by Andrew Wilson

I almost fell out of my chair laughing. All that "midline stabilization" he's telling him to do is restricting movement, blood flow, and wasting energy. The entire torso is suppose to be completely relaxed, even hands and face (notice sprinters like Tyson Gay with flailing hands). Stabilization in running is neurological

Andrew,
I read an article a few months back on the corkscrew with the arms in sprinting. Something about how the fascia corkscrews around the body (ie, right shoulder tight often equals a tight/stiff left hip, I think). They had a sprinter, who i can't remember, who had shown big improvements.

I haven't seen anything else about it though.

You hear about this before?

[Russell Crosswy]

Where is that EMG image from?

Originally Posted by Andrew Wilson

hahahaha wow this man http://media.crossfit.com/cf-video/C...ng_tw0_PRE.mov




Look you do not intentionally "pull your foot up" or intentionally "contract your hamstrings" to bring your foot up - this is how you tear your hamstring.
You don't "stop using the hamstring, because you have to" this is complete nonsense.
Bmac is teaching people how to tear their hamstrings.



In the support phase (middle row, 4th picture in the lagat picture above) you are absorbing impact, just like a box jump, and eccentric muscle action is happening to control this impact and the body sinking, it switches to concentric contraction for the push off and leg drive (middle row, 5th picture, and bottom row). The whole point of this leg drive and pushoff is to propel your center of mass forward (your hips). This is why runners have low vertical jumps and long horizontal jumps- because they're NOT vertical "jumpers", they're horizontal "jumpers"- GLASSMAN. When the leg drive ends into flight phase (top row, 4th & 5th picture), all that muscle tension in the concentric pushoff and leg drive is released into free air being its not fighting the ground anymore; this is why the faster you sprint, the more force generated, the further your leg flys behind you= tension release. THIS IS A REACTIONARY MOVEMENT, NOT VOLUNTARY. The hip flexors in this back leg drive and pushoff are stretched in an eccentric contraction (left leg, top row, 4th picture), in flight phase, this stretched eccentric tension is released, immediately turns concentric, and swings the thigh forward, the hamstrings eccentrically tense to act as stabilizers and control the ROM (this is NOT A VOLUNTARY CONTRACTION), shin folds under, the closer the shin folds into the body, the smaller the lever, smaller levers travel faster.

Bmac isn't teaching ANY OF THIS. He's just saying pull your heel up and lean, this is nonsense.

[Andrew Wilson]

World Record technique:

Originally Posted by Andrew Wilson

Crossfit technique:

[Andrew Wilson]

Originally Posted by Russell Crosswy

Where is that EMG image from?

http://www.coachr.org/hamstring_inju..._sprinting.htm

[Andrew Wilson]

Originally Posted by Derek Weaver

Andrew,
I read an article a few months back on the corkscrew with the arms in sprinting. Something about how the fascia corkscrews around the body (ie, right shoulder tight often equals a tight/stiff left hip, I think). They had a sprinter, who i can't remember, who had shown big improvements.

I haven't seen anything else about it though.

You hear about this before?

Haven't heard that before, should look into it.

[Donald Lee]

That side-by-side comparison really makes BMac's technique look laughable.

Since running technique has been brought up, I think people could appreciate the following threads:

http://www.elitetrack.com/forums/viewthread/7911/

Regarding the above thread, there was a MASSIVE debate on the Supertraining list, so some may not follow what they're arguing and the terminology used in the above thread. Looking at the Barry Ross thread on this forum might help to understand what they're talking about in the above and below thread.

http://www.elitetrack.com/forums/viewthread/4510/

[Donald Lee]

Originally Posted by Derek Weaver

Andrew,
I read an article a few months back on the corkscrew with the arms in sprinting. Something about how the fascia corkscrews around the body (ie, right shoulder tight often equals a tight/stiff left hip, I think). They had a sprinter, who i can't remember, who had shown big improvements.

I haven't seen anything else about it though.

You hear about this before?

I wouldn't be surprised if there were some improvements. Fascial work can be amazing.

http://www.structuralwisdom.com/Anat...ain_Lines.html

[Andrew Wilson]

Originally Posted by Andrew Wilson

Crossfit technique:

Rudisha (800 WRH)


Bolt

[Corey Kissel]

Just another gem I came across...WFS

http://www.denverpost.com/ci_18534215

[Steven Low]

I don't exactly see how thrusters are gonna help Moreno's speed or cutting ability as a running back but ok.