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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for fartlek

fartlek

/ (ˈfɑːtlɛk) /

noun

sport another name for interval training

Word Origin for fartlek

Swedish, literally: speed play
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012