fartlek

1.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）。

2.Incorporate several cardio techniques – Use a combination of continuous, interval, circuit and Fartlek (speed play) training.

有氧运动技术的综合运用-连续，间隔，循环，以及变速跑等手段要综合运用。