Cold water swimming is emerging as a global phenomenon, with enthusiasts and researchers alike exploring its wide-ranging effects on physical and mental health. While many are familiar with the initial shock of dipping into cool water, experiences involving near-freezing temperatures have gained attention for their purported benefits.
In northern Europe, particularly among Scandinavian countries, long-standing traditions of alternating between hot saunas and cold water plunges have long been valued for health and wellness. Finland alone counts around 5.5 million residents enjoying 3.5 million saunas. Over recent decades, scientific studies have started to validate these practices, uncovering potential benefits such as boosted immune response, enhanced cardiovascular health, mood stabilization, and significant increases in dopamine levels—sometimes by as much as 250 percent—after cold water immersion.
Ram Barkai, a key figure in the sport of cold water swimming, has helped transform these personal experiences into an organized athletic discipline. Barkai founded the International Ice Swimming Association (IISA), which governs competitions like the “ice mile,” a swim through water below 4 degrees Celsius over a distance of one mile. The association has grown rapidly, drawing more than 750 swimmers from over 70 countries and attracting corporate sponsorship from companies including Garmin and Dryrobe. Barkai aims to secure a Winter Olympics inclusion for ice swimming, reflecting its rising profile on the world stage.
The benefits of cold water swimming extend beyond physical health to mental well-being and resilience, as seen in grassroots initiatives like “Blue Mind Men,” created by cold-water guide Gilly McArthur in the Lake District. Motivated by data showing a 55 percent higher suicide rate in Cumbria compared to the rest of the UK, McArthur started daily swims encouraging men to take part and find community and mental clarity through the cold water experience.
High-profile endurance swims also highlight the sport’s capacity to test human limits. Notably, Colorado swimmer Sarah Thomas made history completing a four-way English Channel crossing, covering the swim in 54 hours. Her achievement was especially remarkable given her prior diagnosis with breast cancer, which included chemotherapy, mastectomy, and radiation treatments. Swimming provided her with a sense of normalcy and purpose throughout her recovery.
Author Chris Ballard, who delves into the subject in his book, has personally embraced the cold water lifestyle both in training and competition. His account reflects the complex blend of physical pain, emotional strength, and euphoria that cold water swimming can provoke.
As scientific research deepens and more individuals adopt the practice worldwide, cold water swimming is being recognized not just as a sport, but as a potentially transformative experience capable of enhancing health, endurance, and mental resilience.