IAAF getting complaints about Vaporfly?

[gh]

story now posted on home page says there is a backlash after the sudden improvement in marathon times

[Atticus]

story now posted on home page says there is a backlash after the sudden improvement in marathon times

Same 'people' who complained about the fiberglass pole?

[gh]

fiberglass poles didn't violate any IAAF rules; it appears that these new shoes MIGHT.

[Atticus]

fiberglass poles didn't violate any IAAF rules; it appears that these new shoes MIGHT.

Virtually everything about T&F today has been 'enhanced' since the early days. Lighter shoes provide an advantage over heavier ones. Blocks provide an advantage over no blocks. Track and spikes provide huge advantages. I understand that putting springs in shoes is over the line, I'm not feeling these Vaporflys as something a whole lot different from the other show innovations (all of which gave advantages. It gave EK maybe a couple of minutes? Hell, the cordon around him did at least that much. Brigid's two male lead runners did that much. Ordinary marathoners can duck into groups and get that advantage.

[JRM]

fiberglass poles didn't violate any IAAF rules; it appears that these new shoes MIGHT.

The articles says

"rule 143.2 stipulates that shoes 'must not be constructed so as to give athletes any unfair assistance or advantage'".

That seems completely nebulous. Spikes obviously give sprinters an advantage over regular-soled shoes. Do they break the rules? The newer lightweight shoes do the same for distance runners.

If the shoes had wheels or rocket boosters in them, I might agree. But optimizing the physics through careful engineering is a plus in my book, not a minus.

[gh]

The articles says

"rule 143.2 stipulates that shoes 'must not be constructed so as to give athletes any unfair assistance or advantage'".

That seems completely nebulous. Spikes obviously give sprinters an advantage over regular-soled shoes. Do they break the rules? The newer lightweight shoes do the same for distance runners.

If the shoes had wheels or rocket boosters in them, I might agree. But optimizing the physics through careful engineering is a plus in my book, not a minus.

light weight isn't the issue here. From teh BJSM article:

<<The Vaporfly deviates from conventional running shoes in three ways: (i) an embedded carbon-fibre plate, (ii) its midsole material, and (iii) its midsole thickness (figure 1). Each of these components has design features that reduce energy loss in isolation and, perhaps more-so, in combination.>>

this is much more than optimizing physics, methinks.

[Atticus]

<<The Vaporfly deviates from conventional running shoes in three ways: (i) an embedded carbon-fibre plate, (ii) its midsole material, and (iii) its midsole thickness (figure 1). Each of these components has design features that reduce energy loss in isolation and, perhaps more-so, in combination.>>

Fiberglass poles did a whole lot more than that!!
These so-called three 'deviations' have another term that applies: 'progress' in shoe technology.
I am definitely calling BS on the iAAF.

[Atticus]

If the Vaporfly really did give a 4% advantage, that should correlate directly to running time (not just the nebulous term, 'energy'), which would have been about 5 minutes. It was less, and well within the realm of normal shoe tech improvements.

[jazzcyclist]

If the Vaporfly really did give a 4% advantage, that should correlate directly to running time (not just the nebulous term, 'energy'), which would have been about 5 minutes. It was less, and well within the realm of normal shoe tech improvements.

That would depend on what unit of measure they're using. 4% greater energy efficiency doesn't mean 4% greater velocity.

[Atticus]

That would depend on what unit of measure they're using. 4% greater energy efficiency doesn't mean 4% greater velocity.

Exactly my point. It's a meaningless term in this context.