A man from Denmark knows has discovered the power of intentional breathing and uses it for incredible things. Wim Hof, also known as the Ice Man, can self-regulate his body temperature despite extreme exposure to extreme cold — just by using his breath.

Wim Hof first gained attention when he successfully remained submerged in ice for almost 2 hours without any drop in his core body temperature.

He has used this breathing technique to scale Everest in shorts, run an unassisted marathon in the Namib Desert, and more.

Rather than tell you how he does it, we want to show you.

This is the power of oxygen, of using breath to embrace difficulty and thrive. This is the Ice Man:

Read more about Wim Hof on his website here.