a method of athletic training (especially for runners) in which strenuous effort and normal effort alternate in a continuous exercise
例句
Consider interval or fartlek training to boost the calorie burn (see page 9). 考虑以间歇或变速训练加快卡路里的燃烧速度(见第9页)。
With time and a few fartlek sessions under the belt the athlete should be his own best judge of the proper severity of the session. 相比间歇跑和只是重复跑,此法和其他训练方式相结合,会产生很好的训练效果,并且减少运动伤害。