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Why do elite marathoners barely slow down? Their bodies are built for efficiency. Here's how to train yours for faster results
Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...
I "Jeffed" a 10K, and the results blew my mind (is this the secret to running faster?)
The surprising thing was, when Jeffing a 10K on Monday, June 16, I ran 6.74 miles (to finish my final five-minute interval), ...