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The article originated with an email exchange I had with someone who knows the shoe, and who got me thinking about the concepts, which I’ve expanded on over the last couple of weeks. My position would be that any device inserted into the shoe, and which purports to add to energy return or elastic recoil or stiffness should be banned.Basically, I think there are two historical cases in play: The Pistorius advantage, which draws a direct line to this, and the Speedo LZR Racer swimsuit and subsequent suits, which illustrate a couple of conceptual issues. That means the carbon fiber plate, or plastic etc but not necessarily the gels/air patches that offer cushioning, and not the foam, either.And thus cutting that technological progression off at the outset is important.Applying the same model to competitive situations, how do you know that Athlete X is not beating Y because of that small (or large) advance in tech?The first clue was in the name – they called it, literally, a “spring plate”.Next, their own words in that patent document: Note the “little to none of this mechanical energy” bit – that tells you that conventional midsoles/foam don’t return energy.So the first potential problem in that situation was that a better athlete comes along, and with the same technology might run 43.3s, or even faster.Then you’d be scrambling to ban the technology, and it would very obviously be because he was too fast, and that’s all kinds of discriminatory.
The same is true for these shoes, though to a much lesser extent, mainly because the frequency of elite runners with access and opportunity is much higher, so we’re far less likely to be shocked by a new athlete.So to me, it’s pretty clear what the Vaporfly Elite’s curved plate has the capacity to do.It’s also clear if you understand how the Pistorius case led, in a direct line, to this point, but more on that below.Instead, it is designed to unload the calves in the face of increased stiffness from the plate.That may be another benefit, and the testimony of a few athletes does suggest that the Vaporfly achieves this, because they say they don’t experience anything like the local muscle fatigue and pain at the end of, or after, long runs.