![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/article-thumbnail/bostonmarathon.jpg)
New shoe makes running 4 percent easier, 2-hour marathon possible, study shows | CU Boulder Today | University of Colorado Boulder
Runnea.com - 🏃♂️ ¿Por qué las #Nike Vaporfly 4% Flyknit se han convertido en las zapatillas de running de los récords? https://buff.ly/2GWxtrX vía @runnea_com | Facebook
![Road Trail Run: Nike Zoom Vaporfly 4% Detailed Breakdown Run and Race Performance Review: Sensational, A Game Changer! Road Trail Run: Nike Zoom Vaporfly 4% Detailed Breakdown Run and Race Performance Review: Sensational, A Game Changer!](https://4.bp.blogspot.com/-mdnv7JBML2U/WXS1zLC1fjI/AAAAAAAAmVA/t0GBN2K1IIUpxSbPBf5s6TWCOL71rNo3gCLcBGAs/s1600/fullsizeoutput_54ab.jpeg)