fartlek

This tried and trusted fartlek pyramid workout will help bring some easy speed and put a spring in your step.

Fartleks challenge your body to become faster over longer distances—plus it’s just a fun word to say.

Did that fartlek workout lead to a major bonk instead of runner’s high? We demystify some of the most common running terms.

Fartlek, which means “speed play” in Swedish, involves varying the intensity to teach your body to recover quickly.

Don’t save speedwork for the few weeks before your race—prioritize it now for a boost later in the season.

“I do it whenever I need to boost my running and inject a little pace to open up the stride."