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Prototyping shoes for Faith Kipyegon’s Breaking4 effort sometimes happened right on site of … More training. Nike Three-time Olympic champion Faith Kipyegon has a singular focus with her new Nike-backed goal: Be the first woman to break the four-minute barrier in the mile run. Nike’s research and development team is hoping to make that happen. The attempt comes June 26 at Stade Charléty in Paris, with every element of aerodynamics, apparel, footwear technology and race conditions designed to help the Kenyan shave at least 7.65 seconds off her 2023 world record time of 4:07.64. “We had to learn specifically what requirements were needed for the four-minute mile and the requirements for Faith to achieve it,” Brett Kirby, principal scientist of applied performance innovation at Nike, tells me. “This is the recipe we have today.” The new system of dress for Faith Kipyegon aims to reduce drag. Nike That recipe includes entirely customized footwear—the Nike Victory Elite FK—and apparel for Kipyegon in the carefully selected Paris location. While Kipyegon set the world record in her Nike Air Victory 2 spike, Carrie Dimoff, Nike’s footwear innovation lead on the project, tells me they wanted to work one-to-one to create a personalized spike for a specific athlete and distance. Building from scratch—and not for a larger audience—allowed the team to bring in an ultra-lightweight yarn for the upper, a lighter carbon fiber outsole plate with six 3D-printed titanium pins and a fresh approach to underfoot energy return. Dimoff says the biggest opportunity—along with minimizing weight by using the most premium of materials—was maximizing energy return. That’s why the forefoot Zoom Air unit is three millimeters taller than on the Victory 2 spike. “We are able to return over 90% of energy and force back to her,” Dimoff says about the air unit. “We…

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Filed under: News - @ June 12, 2025 6:25 pm