Last night, in a sunny Paris evening at Stade Sébastien Charléty,Faith Kipyegon made a historic attempt to achieve a feat no woman had ever accomplished: running a mile in under four minutes. Her previous personal best and world record was 4:07.64. This ambitious goal, part of an event dubbed “Breaking4” by Nike, aimed for a significant improvement, particularly for an athlete already at the pinnacle of her sport.

Despite a powerful performance in front of an enthusiastic crowd, Kipyegon crossed the finish line in 4:06.42, a time held by her mentor, running icon Eliud Kipchoge. While she didn't break the four-minute barrier, the effort was far from futile. The extensive training, strategic planning, and innovative gear designed by Nike all contributed to shaving over a second off her previous world record.

Before Kipyegon's attempt, and perhaps still for some, the idea of a woman achieving a sub-four-minute mile was considered by many, including scientists, to be impossible. However, Kipyegon, with Nike's support, embraced her motto of “daring to try.” Following the race, she expressed gratitude and belief that a sub-four mile for women is still within reach. “I wanted to prove to the world that everything is possible in life,” Kipyegon stated. “You dare to try and I hope one day it will come my way.”

Photo Credit: CBC

The pursuit of the sub-four-minute mile holds deep historical significance in running. Roger Bannister first broke this barrier in 1954, at a time when women were not even permitted to run the distance in the Olympics. It took until 1972 for the Olympics to include a 1500-meter race for women, an event Kipyegon has won three consecutive gold medals in. Since Bannister, nearly 2,000 men have followed suit. As track and field historian Lauren Goss notes, Bannister’s achievement provided a powerful psychological boost, demonstrating that the goal was humanly possible.

Kipyegon's attempt underscored that the sub-four mile is not just a physical challenge but also a mental one. Her belief in its possibility and her willingness to try are beneficial for future female runners. She emphasized, “My message to young girls, especially small ones like my daughter, Alyn, is to not limit themselves. They have to dream and make their dreams valid.” By reducing her time by over a second, she brought the goal even closer.

The Breaking4 event represented a bold, public initiation of Kipyegon’s quest.Elliott Heath, a Nike product expert, described Kipyegon’s willingness to invite others on her journey, her vulnerability, and her relentless pursuit as incredibly inspirational. The event also generated increased media coverage for women’s sports, promoted the normalization of women competing at all levels of running, and fueled scientific research specifically focused on female athletes. For instance, a recent study inRoyal Society Open Science had even predicted Kipyegon could achieve 3:59.37 with pacing. Ultimately, the event signifies that the fight for a sub-four-minute mile for women is far from over.

Nike's involvement in Breaking4 was crucial, providing cutting-edge gear designed to optimize Kipyegon’s speed. Amy Jones Vateralus, VP of Women’s Research at Nike Sport Research Lab, highlighted the meticulous attention to detail, stating that “At Faith’s speed, we are looking at every tiny [detail].” Over nearly a year, the Nike team collaborated closely with Kipyegon, traveling to Kenya for testing and hosting her at Nike HQ for fittings, including a final one just a day before the event.

Photo Credit: OkayAfrica

The custom kit included the Fly Suit, a lightweight, one-piece garment made of proprietary material designed to reduce air resistance. Strategic, pencil-tip-sized nodes on the suit were engineered to disrupt airflow and minimize drag. Kipyegon’s 3D-printed sports bra, made from FlyWeb, a thermoplastic polyurethane, was also a significant innovation. This material reduces moisture retention and heat build-up, addressing disadvantages of traditional sports bras at high speeds. Kipyegon’s continued use of the FlyWeb bra in her routine confirmed its effectiveness to the Nike team.

For footwear, designers created the Nike Victory Elite FK (Faith Kipyegon or “fastest known”) spikes. Kipyegon had already set her mile world record and secured three Olympic gold medals in Nike spikes, specifically the Nike Victory 2s. The new Victory Elite FK was engineered for comfort and confidence for the mile distance, making concessions for extreme lightness over durability. Weighing less than 90 grams, the shoes feature a yarn material for a secure fit, six custom-made titanium pins for traction, a full-length carbon fiber plate, and Nike’s ZoomX foam midsole for enhanced energy return and efficiency. While Kipyegon’s exact race kit is not available commercially, Nike released Breaking4-inspired gear, predominantly in Kipyegon’s favorite color, purple.