fartlek

fart lek |ˈfärtlik ˈfɑrtlək | ▶noun Track & Field a system of training for distance runners in which the terrain and pace are continually varied to eliminate boredom and enhance psychological aspects of conditioning. ORIGIN 1940s: from Swedish, from fart ‘speed ’ + lek ‘play. ’

fartlek

fartlek |ˈfɑːtlɛk | ▶noun [ mass noun ] Athletics a system of training for distance runners in which the terrain and pace are continually varied. ORIGIN 1940s: from Swedish, from fart ‘speed ’ + lek ‘play ’.