This foam is highly resilient and compliant meaning it compresses under load but also returns a significant proportion of energy. The technical name is Pebax, but Nike calls it ZoomX. The first, and key factor, is the foam in the midsole. It's crucial to learn how running shoes should fit. The sample size was just 18 male runners, but this does suggest that Saucony is a viable and more affordable option.
#Are springy shoes better for running trial#
Most runners – 61% – ran their fastest 3km time trial in the Nike shoes. The research team concluded that athletes competing in any of the other shoes were likely to be at a "competitive disadvantage."Īlthough there is little doubt that Nike Vaporfly and AlphaFly are the fastest shoes on the market there are some more affordable alternatives that are worth considering.Ī study of Nike Vaporfly 4% and Saucony Endorphin Racer 2 published in the Journal of Sport and Health Science found that both shoes improved running economy in male recreational runners compared to their usual running footwear. These were the Hoka Rocket X, Saucony Endorphin Pro, New Balance RC Elite, Brooks Hyperion Elite 2 and one traditional racing shoe, the Asics Hyperspeed. The other highly cushioned carbon plated shoes in the study had ‘inferior’ running economy improvements. There has been a limited number of comparison studies to date but a peer review paper in Footwear Science published earlier this year concluded that only the Asics Metaspeed Sky had similar running economy improvements as the Nike Vaporfly Next%2 (shown above) and Nike AlphaFly.
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