![Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/f5670c6db81bb06a5192775ad68df5503dafde3e/1191_273_2309_1386/master/2309.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=f0a9eb842cad09baac87d9c701bd3b0f)
Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
Kevin A. Kirby, DPM - Comparison of Running Economy in Nike Vaporfly 4%, Adidas Adios Boost and Nike Racing Spikes - Will Athletes Start Using Thicker Soled-Cushioned Shoes on the Track for
![World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian](https://i.guim.co.uk/img/media/8dd989f70bc471a8dd2970d87c5338501bb88af1/142_217_3250_1951/master/3250.jpg?width=465&quality=85&dpr=1&s=none)
World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian
![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/marathon-shoes-cc02-2-1510954278.jpg?resize=980:*)
Nike's Vaporfly 4% Shoes Really Did Boost the Running Economy of Everyone Tested, Says Study | Runner's World
![Metabolic and performance responses of male runners wearing 3 types of footwear: Nike Vaporfly 4%, Saucony Endorphin racing flats, and their own shoes - ScienceDirect Metabolic and performance responses of male runners wearing 3 types of footwear: Nike Vaporfly 4%, Saucony Endorphin racing flats, and their own shoes - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2095254620301630-ga1.jpg)
Metabolic and performance responses of male runners wearing 3 types of footwear: Nike Vaporfly 4%, Saucony Endorphin racing flats, and their own shoes - ScienceDirect
Dustin Joubert on Instagram: “Running Economy in Alphafly 4% better than Streakfly for me. Was it ever really a question though? Race your 5k/10k in your most economical…”
![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)