| 单词 | fartlek | 
| 释义 | fart·lek   (färtlĕk) n. 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. [Swedish, speed play : fart, running, speed (from fara, to go, move, from Old Norse; see  per-2 in the Appendix of Indo-European roots) + lek, play (from leka, to play, from Old Norse leika).] | 
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