每次打篮球或者进行其他运动之前我们总要做一些热身活动来准备准备，学英语也是一样，这里有一些可以帮你做学前热身的简单练习。
Just as there are exercises to help you warm up before you play some basketball or other sport, there are exercises which can help you warm up to study English.
这项研究发现这些短暂的拉伸运动几乎不会带来挥之不去的消极影响，特别是如果志愿者在拉伸之后再花几分钟慢跑或者做其他基本的热身运动。
The review found few lingering negative impacts from these short stretches, especially if the volunteers followed that stretching with several minutes of jogging or other basic warm-up movements.
下次当你进行跑步或者在体育馆做其他有氧运动时，屏住呼吸3秒钟，然后在再作下一次憋气前，突然吸气和呼气——这样作会让你变得多么难受？
Next time you're running or doing something aerobic in the gym try holding your breath for 3 seconds and then suddenly inhale and exhale before holding it again - how much harder does this make it?
下次当你进行跑步或者在体育馆做其他有氧运动时，屏住呼吸3秒钟，然后在再作下一次憋气前，突然吸气和呼气——这样作会让你变得多么难受？
Next time you're running or doing something aerobic in the gym try holding your breath for 3 seconds and then suddenly inhale and exhale before holding it again - how much harder does this make it?
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