![Nike's Vaporfly 4% Shoes Really Did Boost the Running Economy of Everyone Tested, Says Study | Runner's World Nike's Vaporfly 4% Shoes Really Did Boost the Running Economy of Everyone Tested, Says Study | Runner's World](https://hips.hearstapps.com/hmg-prod/images/1076/breaking-2-final-nike-theshoes-1510925833.jpg)
Nike's Vaporfly 4% Shoes Really Did Boost the Running Economy of Everyone Tested, Says Study | Runner's World
![Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine](https://c02.purpledshub.com/uploads/sites/41/2021/08/Alamy_2F3Y8J0-crop-ff47efc.jpg)
Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine
![New shoe makes running 4 percent easier, 2-hour marathon possible, study shows | CU Boulder Today | University of Colorado Boulder New shoe makes running 4 percent easier, 2-hour marathon possible, study shows | CU Boulder Today | University of Colorado Boulder](https://www.colorado.edu/today/sites/default/files/styles/medium/public/article-image/marathon_shoes.cc12_0.jpg?itok=-I36ArDc)
New shoe makes running 4 percent easier, 2-hour marathon possible, study shows | CU Boulder Today | University of Colorado Boulder
![Amazon.com | Nike Vaporfly 2. Women's Road Racing Shoes (us_Footwear_Size_System, Adult, Women, Numeric, Medium, Numeric_9) | Road Running Amazon.com | Nike Vaporfly 2. Women's Road Racing Shoes (us_Footwear_Size_System, Adult, Women, Numeric, Medium, Numeric_9) | Road Running](https://m.media-amazon.com/images/I/61wRnjlrhoL._AC_UY1000_.jpg)