ROME – Doping shoes. According to World Athletics, the World Athletics Federation, the Nike ZoomX Vaporfly NEXT% would help athletes run by reducing effort. All because they are built with a special mixture of foams and a carbon plate in the midsole with which, who wears them, can run up to 4% faster than those who use another pair of running shoes. An advantage that World Athletics would like to end: the Federation is in fact considering whether to prevent the use of these "special" shoes at the Tokyo 2020 Olympics.
Shoes worn by the Kenyan runner Eliud Kipchoge , who fell under the hour wall in the Vienna Marathon on 19 October (1 hour, 59 minutes and 40 seconds to travel the 42 kilometers and 195 meters of the track). But also by the Kenyan Brigid Kosgei who holds the women's marathon record.
The issue revolves around the carbon fiber plate, a material so light and rigid that acting as it would guarantee more thrust. Andrea Mola explains to Il Fatto Quotidiano, an aerospace engineer and mathematician at the International School of Advanced Studies of Trieste: “When you compress an ideal spring, you give it energy but when I lift the load, you go back to their original form, giving back everything energy, without dissipation. This in its ideal form, a real spring instead loses it, for example in the form of heat. In this sense, the "spring" of Nike shoes in its compression and release phase loses only 4%, compared to other shoes that instead lose more ".
According to a New York Times study, in the second half of 2019 41% of marathon runners who used the Vaporfly dropped below 3 hours in the marathon, a decidedly important result that combines endurance and speed. (source THE DAILY FACT).
Source: Blitz Quotidiano