A beautifully illustrated exploration of cold-water traditions in Scandinavia and around the world, and a thorough account of why it provides such a boost to body and soul.

Danish scientist Dr Susanna Søberg leads us step by step into the icy water and explains the "cold-shock response", the massive endorphin rush as our body reacts and adapts to very cold temperatures through the winter season. Not only do our circulation, heart, lungs and skin respond positively, but our immune system, metabolism and mental health too. In particular she explains how our "brown fat" is activated to benefit multiple health conditions.

Winter swimming is fast becoming one of our most popular pastimes. This beautifully illustrated exploration of cold-water traditions in Scandinavia and around the world shows how it can have a significant positive impact on our physical and mental health, confidence and well-being, providing such a boost to body and soul.