fartlek
/ˈfɑrtlɛk/
noun
- A training method for runners that alternates between fast running and slow jogging, often used to build speed and endurance.
- Many runners enjoy fartlek because it feels less structured than interval training.
- The coach included fartlek runs in our weekly training schedule to improve our speed.
- During fartlek, you might sprint to a tree and then jog to the next lamppost.