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Yes. I heard he ran with a Nike prototype called alphaFly, which is probably superior to the VaporFly.
by francisofascii 7y ago
Yes. I heard he ran with a Nike prototype called alphaFly, which is probably superior to the VaporFly.
- mlamorte219 7y agoI mean rebound energy is great for a force to hit the ground with less Cush under foot. Newton’s law of physics bounce a ball off pavement and then on a pillow and see what has better rebound energy