Liberal Dictionary English Dictionary
noun
- a training technique, used especially among runners, consisting of bursts of intense effort loosely alternating with less strenuous activity.
noun
- sport another name for interval training
1952, Swedish, from fart “speed” (cf. Old Norse fara “to go, move;” see fare (v.)) + lek “play” (cf. Old Norse leika “play;” see lark (v.)).