fartlek

[ fahrt-lek ]
/ ˈfɑrt lɛk /

noun

a training technique, used especially among runners, consisting of bursts of intense effort loosely alternating with less strenuous activity.

Origin of fartlek

1950–55; < Swedish fart speed + lek play

British Dictionary definitions for fartlek

fartlek
/ (ˈfɑːtlɛk) /

noun

sport another name for interval training

Word Origin for fartlek

Swedish, literally: speed play