When asked if the new version of the shoe, and indeed the Zoom X Invincible Run, Nike's other injury-reducing innovation, had similar statistics, Worobets outlines the latest trends. The findings showed that runners wearing the React Infinity had a 52 per cent lower injury rate than those in the motion-control shoe, with wearers noting that they felt less pain in their knees and feet. Half wore the Nike Structure 22, a traditional motion-control shoe, and half wore the new Nike React Infinity Run.

Conducted by the British Columbia Sports Medicine Research Foundation (BCSMRF), the study divided 226 runners of all ages and abilities into two groups as they trained for a half marathon. Some members of the RW team were sceptical about the injury-reducing claims made by Nike when the Infinity React was launched a year ago Holts is happy to go into detail about the study behind the assertion. Finally, Nike has incorporated вЂFlywire cablesвЂ™, which the company says give the runner more precise support and security. The tongue and collar of the shoe now feature вЂlofted foam for a more supportive and comfortable fit and feelвЂ™, says Holt. There's additional support in the toebox and Nike says it has made the vamp and midfoot more breathable. So what has changed? вЂIt was really more about minor tweaks to the upper and ensuring that the upper felt as protective, as supportive and as cushioned as underfoot,вЂ™ Holts explains.

Nike says, вЂthe heel clip, midsole and outsole remain the same as the previous React Infinity, which provides cushioning for impact absorption and a soft ride, wide forefoot nets for stability without medial posting and rocker geometry for a fluid transition.' The structure of the shoe is similar, too вЂ“ a wider toebox and heel, and an exaggerated heel-toe rocker geometry to help runners get their foot on and off the ground quicker.

Like the previous model, the Infinity Run 2 uses Nike React Foam, which is designed to give runners decent underfoot cushioning. вЂWe knew from underfoot cushioning, stability and protection that we had a great product and we had great feedback from runners, so we wanted to ensure we kept that consistency and kept all those things that runners said they enjoyed about that first iteration.вЂ™ вЂThe changes are pretty minimal and that was the point,вЂ™ Holts tells Runner's World.

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