![]() What they did make an impact on was a positive running experience – sometimes those medial posted shoes were heavy, a bit clunky in transition and overall not super enjoyable, so we’re taking a different approach. ![]() Holt adds, ‘I think what we do know is running-related injuries and rates of injuries haven’t drastically changed over the last 3-4 decades, which means the product solutions that we had been providing didn’t really make an impact. ‘In 2020, we did a similar study with more than 300 athletes and we tested the first Infinity, the second Infinity 2 and the Invincible, and we found that the injury rates between all three were the same – that low injury rate that was carried over from the first Infinity.’ 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 ‘Flywire cables’, which the company says give the runner more precise support and security. The tongue and collar of the shoe now feature ‘lofted foam for a more supportive and comfortable fit and feel’, 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? ‘It was really more about minor tweaks to the upper and ensuring that the upper felt as protective, as supportive and as cushioned as underfoot,’ Holts explains. Nike says, ‘the 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 – 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. ![]() ‘We 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.’ ‘The changes are pretty minimal and that was the point,’ Holts tells Runner's World.
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