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ethe social network for athletes. Nearly ea
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In an announcement earlier this year, the group said, “It is clear that some forms of technology would www.ranmoorpharmacy.co.uk/Nike-Air-Max-90-Womens-c-7_9.html provide an athlete with assistance www.anwaltskurse.de/Nike-Air-Max-270-Damen-c-4_5.html that runs contrary to the values of the sport.” It has since appointed a technical committee to study the shoe question, and to make a report with recommendations. (The report was originally intended to be released to the public by the end of the year; it will now reportedly be released in 2020.)When we asked Nike www.philharmonia.fr/Nike-Air-Vapormax-Femme-c-58_59.html last year about whether its shoes might violate I.A.A.F. rules, a spokesman said the shoe “meets all I.A.A.F. product requirements and does not require www.anwaltskurse.de/Nike-Air-Vapormax-Damen-c-16_17.html any special inspection or approval.”On Thursday, the www.beverleyely.com/Nike-Air-Max-Command-Womens-c-34_35.html company said in a statement, “We respect the I.A.A.F. and the spirit of their rules, and we do not create any running shoes www.prestamatic.fr/ that return more energy than the runner expends.”

There is no such thing as a large-scale randomized control trial for marathons and shoes, but there is Strava, a fitness www.mariavera.es/Nike-Air-Max-95-Mujer-c-25_27.html app that calls itself www.philharmonia.fr/Nike-Air-Max-95-Femme-c-31_32.htmlthe social network for athletes. Nearly each weekend, thousands of runners compete in races, record their performance data on satellite watches or smartphones, and upload their race data to the app. This data includes things like a race name, finish time, per-mile splits and overall elevation profile. And about one in www.ranmoorpharmacy.co.uk/Nike-Air-Max-270-Womens-c-4_6.html four races includes self-reported information about a runner’s shoes.In all, this data includes race results from about 577,000 marathons and 496,000 half www.aazmotos.fr/Nike-Air-Max-95-Femme-c-36_37.html marathons in dozens of countries from April 20www.annieemmerson.co.uk/Adidas-ZX-Flux-Womens-c-101_102.html 14 to December 2019.These approaches are essentially identical to the ones The Times used last summer. See that article for more examples and methodological details.

We measured the shoes’ performance using four different methods — each with its own strengths and flaws:None of these approaches are perfect, www.dancardwell.co.uk but they www.ranmoorpharmacy.co.uk/Nike-Air-Max-95-Womens-c-10_12.html all point to the same conclusion: Something is happening in races with the Vaporfly and Nike Next% shoes that is not happening with most any other www.carlosvisuara.es/Adidas-ZX-Flux-Mujer-c-82_84.html kind of popular shoe.More than 110,000 athletes uploaded data for more than one marathon, and about 47,000 uploaded data for three or more marathons. The Strava data allows us www.annieemmerson.co.uk/Nike-Air-Vapormax-Womens-c-62_63.html  to follow these repeat racers over time and as they change shoes.
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