Do Nike’s Zoom Vaporfly 4% Marathon Shoes Actually Make You Run Faster?

To run a fast marathon, you need to be good at two things: not spending energy and spending energy. For the first 20 miles or so, you need to go slower than your body wants. Conserve. Relax. Draft. And then, for the last six miles or so, as your body painfully shuts down—as your quads …

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