fartlek

Borrowed from Swedish fartlek, from fart (“speed”) (ultimately from Proto-Indo-European *per- (“to go through; to carry forth, fare”)) + lek (“child’s play”) (ultimately from Proto-Indo-European *leyg- (“to jump around, run around; to frolic, play; to dance; to jitter, shake”)).^[1]

• (Received Pronunciation) IPA^(key): /ˈfɑːtlɛk/
• (General American) IPA^(key): /ˈfɑɹtlək/

• Audio (General American):

  (file)

• Hyphenation: fart‧lek

fartlek (countable and uncountable, plural fartleks)

1. An athletic training technique, used especially in running, in which periods of intense effort alternate with periods of less strenuous effort in a continuous workout.

   Synonym: interval training

   • 1992, Hal Higdon, “Fartlek: A Time-tested Treasure”, in Kathleen A. Becker, editor, Run Fast: How to Train for a 5-K or 10-K Race, Emmaus, Pa.: Rodale Press, →ISBN, pages 128–129:

     In an article in Athletics Journal, Paul A. Smith described fartlek as "a continuous overdistance run with numerous faster-paced interval runs interspersed, until the runner feels tired, but not exhausted." Smith claimed that because fartlek existed in the mind of the runner as a form of play, it deemphasized the feeling or perception of fatigue. […] In a typical fartlek workout, you pick some landmark such as a tree or a bush and sprint to it, then jog until you've recovered.

• wind sprint

• fartlek on Wikipedia.Wikipedia

Swedish Wikipedia has an article on:

fartlek

Wikipedia ^sv

fart (“speed”) +‎ lek (“(child's) play”)

fartlek c

1. fartlek

• fartlek in Svensk ordbok (SO)