Cold-water immersion, like cold water baths.

冷水浸泡，比如冷水浴。

This is because it is hard to develop a placebo for cold water baths.

这是因为很难开发出冷水浴的无效对照剂。

Here is what medical evidence, experts and fans say about cold water baths, an activity that dates back hundreds of years.

以下是医学证据、专家和粉丝对冷水浴的看法，冷水浴是一项可以追溯到数百年前的活动。