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Related to fartlek: Fartlek training
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.
2. A workout using this technique.
(Athletics (Track & Field)) sport another name for interval training
[Swedish, literally: speed play]
a training technique, used esp. among runners, consisting of bursts of intense effort loosely alternating with less strenuous exertion.
[1950–55; < Swedish fart speed + lek play]