Etymology

fartlek

fart·lek
F4A1R1T1L1E1K5

Today it means: 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. Full definition →

Swedish fartlek
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The story

  1. Swedish · borrowed fromfartlek
  2. English todayfartlek

Borrowed from Swedish fartlek, from fart (“speed”) + lek (“child’s play”).

Etymology from Wiktionary, CC BY-SA 4.0.