Nike funded the study, and Kram is on the company’s scientific advisory board. “What’s really notable to me is, we had 18 subjects, and every single one of the 18 saved energy,” Kram said. The energy savings ranged from 2 to 6 percent but averaged 4 percent, and every runner saw savings. Researchers collected physiological data, measuring rates of oxygen consumption, carbon dioxide production and rate of metabolic energy consumption in the runners. Niwot High, a mecca for cross-country running, eyeing girls and boys state titles “It’s a combination of existing technologies put together in an ambitious way,” Hoogkamer said. ![]() The shoes themselves aren’t a radical departure from what running companies have created over the years: they have a carbon fiber plate (Kram noted that other brands have used plates in the past, and that spiked track shoes often have a plate) and a cushy foam midsole. He was wearing the 4%s for the attempt.– More recently, Shalane Flanagan won the New York City Marathon wearing the 4%s. In May, drafting off a team of runners switching in to help him and other runners for the attempt on a Formula One track in Italy, Kipchoge crossed the line at 2 hours and 25 seconds. But during Nike’s Breaking 2 project, in which some of the world’s fastest marathoners worked with coaches and a “science team” from Nike to try to break the two-hour barrier, Kenyan runner Eliud Kipchoge ran a faster marathon, though not for the world record. The current world record for marathon stands at 2 hours, 2 minutes and 57 seconds. “But if you wear these shoes and don’t drink any water for 26 miles, it’s not going to be the shoes that explain why you didn’t run in under two hours.” “These shoes reduce the energy you need to run at a certain speed,” he said. ![]() Many factors can affect a runner’s performance: wind, nutrition, turns on the course, hills. ![]() ![]() “People are going to holler at us for saying that,” said Rodger Kram, a professor of integrative physiology who was also an author on the study. Thursday, November 10th 2022 Home Page Close Menu
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