If you’ve been on the fitness side of the internet long enough, chances are you’ve already heard about the benefits of cold water. Often dreaded by those unacquainted with the experience, ice baths are actually an invaluable tool for getting the most out of your post-run recovery — even Kipchoge is a fan.

When the north wind of the cold winter howls past, the earth is covered with frost and snow. People wrap themselves tightly in cotton-padded clothes and hide in warm rooms, fearing that even a hint of cold might invade their bodies. In such a season, when the three words "ice bathtub" are mentioned, many people would probably gasp in astonishment and even blurt out, "Are you crazy?" However, it is precisely in such a harsh season that there is still a group of people who choose to step into a bathtub filled with ice water and have a dialogue with the extreme cold through their bodies. So, would you dare to use an ice bathtub in winter?