Progressive training and the improved running performance itself will do that, they say.

他们表示，渐进式训练和提高跑步成绩本身就能做到这一点。

I think it's a beautiful example of progressive training.

我认为这是渐进式训练的一个很好的例子。

But, a group of researchers say that belief is a myth. Instead, they say an active warm-up can help with running performance and progressive training can reduce injury risk.

但是，一组研究人员指出，这种观念只是迷信。相反，他们说积极的热身动作有助于提高跑步成绩，渐进式训练可降低受伤风险。

And over time you'll find that your body starts to handle a progressive training load more and more. The reason it's important to have multiple easy days every week is to do each session as fresh as you possibly can.

随着时间的推移，你会发现自己的身体开始越来越能承受渐进式的训练负荷。每周有多个轻松的训练日之所以重要，是因为每次训练都要尽可能保持精力充沛。