Showing posts from March, 2020

Nike AlphaFly. It’s not the carbon plate. New Research 2020.

A study has been released (Feb 2020, pre-publication) that looks into the physics and physiology
of carbon fiber plates in running shoes;  “Adding carbon fiber to shoe soles does not improve
running economy: a muscle-level explanation.”  (Full study HERE).

The goal of any running shoe manufacture is to help an athlete reduce the energetic cost of
running at a given speed. I.e improve running economy. Traditionally, shoe manufactures did
this by making shoes ultra-light. However, over the last few years, we’ve seen the introduction of
monster truck shoes with stacks of cushioning and carbon fiber plates.

Despite numerous world records being broken since the introduction of the Nike VaporFly in 2017
we’re yet to see conclusive evidence if the carbon fibre plate adds a performance boost, as opposed
to the cushioning that surrounds it.

As at March 2020, there have been two studies showing an
improvement in running economy with carbon plates (0.8% and 1.1%), and now four showing no