interval training

基本解释

Interval training teaches the heart and muscles to use oxygen more efficiently.
交替训练可以训练你的心脏和肌肉更有效率的利用氧气。
blog.sina.com.cn
Or investigate interval training, where you punch up the intensity for a short periods of time between more moderate exercising.
或者研究间隔性训练，你计下每段短时间的强度练习，比中等练习更好。
HIIT. Short for High-Intensity Interval Training, HIIT is all the rage in many exercise circles, because of studies showing that it’s good for fat-burning and you can get a good workout in less time.
高强度间歇训练。这种训练在很多训练周期中都有，因为研究发现这种训练可以促进脂肪燃烧，你可以在更短的时间内达到很好的训练效果。

Interval training has helped usher in a brave new world of science-based fitness.
FORBES: How Short And Intense Workouts Changed Fitness For Everyone
Ultimately, the proliferation of interval training and other high-intensity protocols has saved a lot of time and burned a lot of fat for fitness enthusiasts worldwide.
FORBES: How Short And Intense Workouts Changed Fitness For Everyone
On the other hand no diet alone, restriction diet or otherwise, will double lifespan. (See further below.) Media focus on caloric restriction diets is for the sole purpose of diverting attention from megadoses of antioxidants, especially Coenzyme Q10, combined with interval training and no meat in the diet and the daily inclusion of oatmeal, an approach which can indeed double lifespan.
FORBES: Extradite Andrew Wakefield To Face Fraud Charges In The UK

a form of physical training that consists of short periods of exercise of varying intensity (= difficulty) with short periods of rest in between

a method of athletic training using alternate sprinting and jogging (Also called fartlek)