![]() ![]() ![]() These tend to sound louder with each foot strike apparently. I know several elite and sub elite runners who prefer the Vaporfly over these, however. In addition to an efficiency boost from the shoe, if you FEEL fast in these shoes then there definitely could be a placebo effect by wearing the shoes that very likely could improve your performance as well. However the studies do show that on average, it does improve running efficiency similar to the Vaporfly 4% (shown to improve running EFFICIENCY but not marathon times by 4%). Unfortunately, I would say these will assuredly not improve your running pace by 20-30 seconds per mile in a marathon. Just remember they wear out fast - you may get 3 races out of them so don't expect to use for training. For marathons, these are great and very popular in the running community as you could easily see a 10-15 minute improvement. ![]()
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