Comments on: Factors Contributing to the Energetic Cost of Running: Great Article by Kevin Maggs https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html Running Shoes, Gear Reviews, and Posts on the Science of the Sport Tue, 09 Apr 2013 15:36:00 +0000 hourly 1 https://wordpress.org/?v=5.7.11 By: Fran Sur https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857908750 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857908750 Great research. Not sure how much it relates to real life outdoors running, but pretty sure this is as controlled as it’s gonna get. Makes me think that learning to run with gravity (chi?) is the most optimal way in making forward propulsion and leg swing happen with less effort..

]]> By: Greg https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857965616 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857965616 A very pro-cushioning result! Fascinating!

]]> By: Pete Larson https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857993307 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857993307 In reply to Fran Sur.

Except that gravity is a vertical force, so I don’t really agree with how Chi and POSE apply the gravity argument. The best way to fight the effects of gravity is to weigh less.

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]]> By: Stephen Boulet https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857841561 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857841561 Nice. I hope the 7 pounds I lost will help me in my spring marathon. I also admired the Rube Goldberg contraptions researchers used to isolate components of running effort.

]]> By: Pete Larson https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857993907 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857993907 In reply to Greg.

It’s a bit of a Goldilocks effect – not too much cushion, not too little. You have to get it just right, and just right is about what is found in most racing flats.

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]]> By: Pete Larson https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-860838353 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-860838353 In reply to Dave.

I think your are right, and I think the ideal amount and firmness of cushioning varies by individual and the properties of their anatomy. I find running on a track in a soft shoe to not be enjoyable, and running slow on a road in an overly firm and thick shoe is not enjoyable. Benny Nigg’s muscle tuning work really hones in on this stuff.
Sent from my iPad

]]> By: Pete Larson https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857855463 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857855463 In reply to Stephen Boulet.

Trimming off those excess pounds is probably one of the single best things you can due, aside from training, to improve running economy.

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Pete Larson’s Web Links:
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]]> By: Dave https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-858662898 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-858662898 I met Kevin at the Rehoboth marathon (which you should check out – great course), and he later did an online video gait analysis for me. Nice guy.

This article was a really good summary, and answered some questions I had been thinking about recently.

The cushioning/Goldilocks part was particularly interesting. I wonder how well the 10mm result lines up with what elite marathon runners use on their feet. Track athletes wear spikes with no cushioning, but the tracks themselves have a varying amount of cushioning. Are the ‘fast’ tracks providing the equivalent of 10mm EVA foam cushioning?

I wonder if the cushioning sweet spot is the level where energy return happens at the correct frequency? E.g. A granite running surface would return energy immediately (high resonant frequency), which may be too fast to benefit a human runner. A trampoline (low resonant frequency) returns the energy too slowly. Somewhere between is a resonant frequency (running surface + shoe cushioning) that is ideal for runners, or at least for runners at a certain cadence.

]]> By: Steve Tremblay https://runblogger.com/2013/04/factors-contributing-to-energetic-cost.html#comment-857998076 Tue, 30 Nov -0001 00:00:00 +0000 http://localhost/runblogger/wordpress/?p=99#comment-857998076 I would also add apparel as factor for energy lost. A baggy shirt with a baggy pant could make lot of drag, especially during a windy day.

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