Dustin Joubert

Kinesiology Prof (Exercise Physiology) 🏃🏽‍♂️👟📊📲:

[Alex Hutchinson @sweatscience]

Just when you thought the supershoe wars were over... Puma claims its new Fast-R 3 is ~3.5% better than the WR-setting Alphafly 3 and Adios Pro Evo 1. And they've got data from Wouter Hoogkamer, who did the original Vaporfly 4% study, to back it up.
https://t.co/vyGwJppIvP

[Dustin Joubert @labratrundown]

@sweatscience Exciting stuff! Do you have the link to the preprint that’s mentioned? I can’t seem to find it on biorxiv.

[Alex Hutchinson @sweatscience]

My latest @Globe_Health column is about what @geoffreyburns and @labratrundown call the "postmodern footwear era."

Here's the column (paywall):
https://t.co/RtkOr5cTxU

And here's the original paper, which is awesome (love that "postmodern" label!):
https://t.co/xRmeh1rFw8

[Int'l Journal of Sports Physiology and Performance @IJSPPjournal]

Now ahead of print: Running Shoes of the Postmodern Footwear Era: A Narrative Overview of Advanced Footwear Technology by @geoffreyburns & @labratrundown https://t.co/hRaFo5N4jD

[Dustin Joubert @labratrundown]

Question 2

[Dustin Joubert @labratrundown]

Super spike project with @gm_on0 and @geoffreyburns now published in @IJSPPjournal

https://t.co/pGNLA10dsw

[Dustin Joubert @labratrundown]

Question 1

[Dustin Joubert @labratrundown]

@gwdiv @JDruns @sweatscience No difference in Alphas at 200k in case study testing. Only slight reduction at 400k. Maybe better foam life or contribution from airbags more durable? Agree though, would be nice to see in other PEBA shoes.

[Alex Hutchinson @sweatscience]

Looking forward to this running/coaching symposium... especially to picking @labratrundown's brain on supershoes! I'll be speaking about the limits of endurance + the future of endurance science.

Charlotte, Dec 9-10. Apparently $25 off with code ALEX.
https://t.co/ICWW02DDEl

[Víctor Rodrigo @VictorRodrigoCa]

New paper where we evaluate the effect on the running economy of two Advanced Footwear Technology of different midsole materials (PEBA vs. EVA) and these same models worn with 450 km.

@GIRD_UCLM @uclm_es @FACDEPORTEUCLM @UMassAmherst

https://t.co/Onr63kzGNm

[Dustin Joubert @labratrundown]

@learn_think_run It's a great thread! No doubt individual responsiveness is important. I love the rubber bouncy ball theory too. Actually gearing up for a project to test that here soon.

[Dustin Joubert @labratrundown]

@learn_think_run So that range from 3-5% in the benefit b/w days would essentially be a wash when trying to look at differences in individual responsiveness across different runners. This is the range I've seen in myself who tests a lot, could be larger for others.

[Dustin Joubert @labratrundown]

@learn_think_run This isn't inconsequential, but to make strong claims about individual responsiveness we need a good study in the lit that looks at the between day benefit of a given shoe. From personal testing, I know I get around 4% avg in AF, but b/w days this can vary 3-5%...

[Dustin Joubert @labratrundown]

@learn_think_run I do think the +/- 11% variation b/w individuals in the Knopp study are an anomaly. Increased variability likely due to some combination of: single trial per shoe instead of duplicate, 1-min window avg. instead of 2-min, comfortability w/ treadmill running in elite east africans?

[Dustin Joubert @labratrundown]

@Justin_Matties @sweatscience @runnerphysio @chrisbramah I’m gonna leave the training studies to @Justin_Matties so I can have some time to try to do the rest of my job halfway decent. 😉 Looking forward to hearing more from his results after this fall!

[Dustin Joubert @labratrundown]

@jfletcher14 It’s not on any difference values. Just a way to express the standard deviation as a percentage of the mean for reliability of repeated measures. I’ll email you some sample data I have and a few papers I’ve used as guide. I have not used MSE.

[Dustin Joubert @labratrundown]

@jfletcher14 That’s the within subject coefficient of variation calculated as SD/Mean.

[Dustin Joubert @labratrundown]

@jfletcher14 @stevemagness @sweatscience When testing within-day and in duplicate, the CV on our Parvo is often below 0.5%. This is why we stated this value for the shoe vs spike individual comparisons. Certainly less than 1%. Likely larger on other carts and when not compring duplicate trials.