yaya2017
Prof. Member
Geregistreerd op: 16 Okt 2018
Berichten: 533
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 Geplaatst: 15-11-2019 08:59:43 Onderwerp: ban or regulate the sneakers. |
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Many marathoners are switching to the Vaporfly, which retails Nike Air Max 90 Dames for $250 (and also comes in bright Nike Air Vapormax Womens green and orange), because research shows that it may help runners go faster. When Kamworor set the world record for fastest half-marathon Nike Air VaporMax Dames — 58 minutes, 1 second — he was also wearing Vaporflys.The shoe's soles have a fusion of foam and carbon-fiber plates designed to help runners get the most forward Adidas ZX 700 Femme push for each stride. A February study done by researchers unaffiliated with Nike found that the shoes improved runners' energy efficiency by 4% (hence the moniker) compared with other Nike Air Max 90 Uomo sneakers.Over marathon-length distances, 4% can mean a lot — it'd cut about nine minutes off a 3 1/2-hour marathon time.
Another study, from November 201Adidas NMD Femme 7, looked at early Vaporfly models and reached the same conclusion: "The prototype shoes lowered the energetic cost of running by 4% on average," the researchers wrote.They Adidas Superstar Donne added: "We predict that with these shoes, top athletes could run substantially faster and achieve the first sub-2-hour marathon." Two years later, that prediction came true.In Adidas ZX Flux FemmeOctober, Kipchoge completed the Ineos 1:59 Challenge marathon in Vienna — an event arranged specifically for him to attempt a sub-two-hour marathon — in 1 hour, www.aralys.fr 59 minutes, 40 seconds.Kipchoge was wearing a prototype of the Nike Vaporfly that haven't hit the market yet.The IAAF, which governs most international track and field events, Nike Air Vapormax Femme has yet to make any Nike Air Max 95 Womens move to ban or regulate the sneakers.
Shoes aside, Kipchoge's Vienna achievement doesn't count as a world record because the runner had a rotating Nike Air Max 95 Damen phalanx of pacesetters — who were also wearing Nike Vaporflys — that kept him on pace and broke the wind. That's against the regulations set by the International Nike Internationalist Dames Association of Athletics Federations (IAAF).Last year, ahead of his second New York City Marathon, Kamworor was asked whether he thought the Nike Vaporfly 4% shoes confer an advantage."I www.aadkruiswijk.nl don't think that the shoe is a factor. Provided that you are prepared, that you are training hard, you can run with any kind of shoe. So the shoe is not Nike Air Max 97 Femme a disadvantage to other people," Kamworor said in a press conference.Not all runners agree about that, though. |
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