Coach: Go faster preview

If you want to run fast, the saying goes, you’ve got to run fast. To stoke speed, most runners do traditional speedwork: aiming for near race pace over distances of 400m or more, with recovery periods equal to the length of the repeat (or slightly less). A way to get fast even faster is with super-short, super-fast efforts, which is sometimes referred to as high-intensity interval training (HIIT). 

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