![]() Later studies and analysis proved this to be true. The first version of Nike's Vaporfly marathon racing shoe that debuted in 2016 was claimed to make runners four per cent more efficient. Ultimately, this means that the runner has to expend slightly less energy with every stride. "These give you back more energy – they're more like 90 per cent energy efficiency," he says. Tony Bignell, vice president of footwear innovation at Nike, says when runners run on the large chunk of ZoomX foam, they see around 80 per cent of that energy exerted returned. If you think they look like a suspension system that compresses under pressure, that's because it's exactly how it works.īoth pods have been added to provide more comfort for a runner but also because Nike believes they stop as much energy being wasted. At their simplest, the pods are air-filled sacks placed on the bottom of the shoe. In its place are two Air Pods (no relation to Apple). Instead of the midsole just consisting of one huge chunk of the ZoomX foam (known in the industry as Pebax), Nike has cut out a chunk of the foam towards the front of the foot. ![]() But turn the shoe over and this is where big changes have been made. ![]()
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