单词	fartlek
释义	fartlek /ˈfɑːtlɛk / noun [mass noun] A system of training for distance runners in which the terrain and pace are continually varied.Also called fartlek training, intervals are used by competitive endurance athletes for improving speed and conditioning.... The basics of fartlek is to vary your training routine, have fun and invent new things to do. This weekly program devotes four days to recovery training and two to aerobic and threshold training, via fartlek or ‘speed play’ exercise. Origin 1940s: from Swedish, from fart 'speed' + lek 'play'.
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