The Biomechanics of Competitive Male Runners in Three Marathon Racing Shoes: A Randomized Crossover Study.

Published in: Sports medicine (Auckland, N.Z.) (2020)

The metabolic savings of the NP shoes appear to be due to: (1) superior energy storage in the midsole foam, (2) the clever lever effects of the carbon-fiber plate on the ankle joint mechanics, and (3) the stiffening effects of the plate on the MTP joint.

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