FARTLEK


Meaning of FARTLEK in English

/ ˈfɑːtlek; NAmE ˈfɑːrt-/ noun

[ U ] training for runners in which the speed and type of ground are varied

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WORD ORIGIN

1940s: from Swedish , from fart speed + lek play.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.