Shoe influence on second half of marathon

"The average Vaporfly runner ran the second half of the marathon a minute and forty seconds slower than the first. But the average non-Vaporfly runner ran the second half five and a half minutes slower." wired.com - Do Nike's new marathon shoes actually make you run faster?

"Energetic savings due to running shoe properties are typically trivial to small. For every 100 g of added mass per shoe, the energetic cost of running increases by 1.0%." link.springer.com - A Comparison of the energetic cost of running in marathon racing shoes

Cutting Open The Nike ZoomX Vaporfly Next% (You won't believe what's inside!!)

See also:
10kmlauf.blogspot.com - Nike flynit Racer
10kmlauf.blogspot.com - Nike flynit
10kmlauf.blogspot.com - Einfluss des Schuhgewichts auf die Leistung 
nytimes.com - Nike Vaporfly shoe
link.springer.com - A Randomized Crossover Study Investigating the Running Economy of Highly-Trained Male and Female Distance Runners in Marathon Racing Shoes versus Track Spikes
leichtathletik.de - Nike Zoom Vaporfly Next% Angepasst, um den Grip bei nassem Wetter zu verbessern
shop4runners.com- Vaporfly-4-percent
outsideonline.com - Nike-vaporfly-carbon-plate
tandfonline.com - Running economy, mechanics, and marathon racing shoes
nzz.ch - Alles eine Frage der Schuhe?