N [sport] → another name for interval training
Fartlek is a Swedish term that means' speed play 'or playing with speed.
“法特莱克”是瑞典语“速度游戏”的意思。
To maintain your speed during the cold-weather months, do one fartlek workout every week.
为了在寒冷的季节保持你的速度，你需要每周进行一次法特莱克跑。
Speed play (aka Fartlek) — Fartlek, commonly known in the U.S. as interval training, is the Swedish word for “speed play.”
法特莱克训练法——也就是在美国众所周知的变速跑。
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