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Can Nike's $250 Running Shoes Make You Run Faster? NYT Analysis Says Yes (fastcompany.com)
Last year, Nike released a new pair of running shoes that claim to make you run 4% faster, thanks to its proprietary sole technology. The new "Vaporfly 4%" shoes would, in theory, "be enough to help a runner break the mythical two-hour marathon barrier for the first time," Fast Company points out. The New York Times decided to put the shoes to the test through an intensive analysis of 500,000 marathon and half marathon running times, culled from the social network Strava. Nike's claims apparently check out. Fast Company reports the findings: We know a lot about the runners in our data set, including their age, gender, race history and, in some cases, how much training they've done in the months before a race. We also know about the races themselves, including the distribution of runners' times and the weather that day. We can put all of this information into a model to try to estimate the change in runners' time from their previous races. After controlling for all of these variables, our model estimates that the shoes account for an expected improvement of about 4 percent over a runner's previous time. Including the uncertainty around the estimates, the Vaporflys are a clear outlier, one of the only popular shoes we can really say makes any difference at all.
The .0001% of elite runners where footwear technology might be a variable in their performance don't typically buy their own shoes.
They are gifted to them or are required to wear them as part of their endorsement deal with Nike. ( Or Reebok, or $Shoe_Brand )
The other part of that endorsement deal is them getting in front of a camera and convincing YOU that buying this shoe will make you
into the most awesome athlete the world has ever seen.
Just look what it did for them ! :|