Image|Runner’s World   PEBAX Shoes get slower over time – Sorry, Nike Víctor Rodrigo-Carranza et al. have released a study analysing the energy cost of supershoes but this time around they’ve looked at the difference between supershoe sole materials both when the shoes are new AND after 450km/300 miles of use. More: Arkema (PEBAX) More: EVA Science Source: Wiley The two key findings seem to be that PEBAX is better when new and that it degrades over time to perform similarly to EVA. I can’t say I’m surprised with either of those findings and my own anecdotes would agree. Tip:…

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