Aging comparison of two running shoes with different technology

NewsBot · Jul 5, 2016

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Aging comparison of two running shoes with different technology
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Running shoes provide cushioning to the foot by the presence of a foam sole that dampens the impacts. However the mechanical properties can change substantially during usage, especially during the first kilometers. This modification is due to repeated cycles of loading and unloading of the material that the foam is made of and it can lead to variations in comfort and performances. The aim of this study was to conduct an ageing analysis on two new technologies present in the market: Lite-ride technology by Hoka OneOne and Boost technology from Adidas. Six runners were recruited to run a distance of 100 km with each model of shoe and be subjected to insole pressure distribution tests with a Pedar system (1) and electromyography tests (2) along the running distance. Dynamic compression tests (3) were also carried out to give information on the shoe?s properties: an important thickness reduction and an overall stiffening of the sole was revealed as general behavior. Information on the variation of the hyperelastic response of the foams at constant force and at constant energy input are present. Subject specific results are also discussed with an overview of all the measuring techniques used, showing a possible direct relation between the results found for each method. Images at scanning electron microscopy (SEM) were also taken providing information on the foam structure and on the degradation at a microscopic level.
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