THE SCIENCE & THE REACH
15+Years of peer-reviewed research in metabolism & contrast therapy
Trained by Dr. Søberg in the Thermalist® Method, in more than 25 countries.
From Denmark to New Zealand, at venues and with Independent Guides.
Published in Cell Reports Medicine and Cell Metabolism.
The Thermalist® Method
Train with Dr. Søberg. Offer the Thermalist® Method.
Venues and Independent Guides train online first, then in person with Dr. Søberg in Tylösand, Sweden. Next training: 12-14 March 2027. Spots are limited, and applications are reviewed as they come in.
Independent Guide training: 3,500 EUR. Venue pricing is set by the size of your venue.
Inside the Thermalist® Method
Narrated by Dr. Søberg and filmed with Thermalist® Guides in the heat and the cold. The next group meets in Tylösand, Sweden, on 12-14 March 2027.
See the training and apply
FOR WELLNESS & HOSPITALITY OPERATORS
The Thermalist® Recovery System
A complete contrast therapy system for wellness facilities, spa hotels and hospitality venues. Structured programmes, Guide training for your team and guided experiences, all built on the peer-reviewed science of the Søberg Principle.
Venues small and large are welcome.
300+ Guides trained in 25+ countries
Our Science Featured In
Our founder
Dr. Susanna Søberg
PhD scientist in metabolism, international bestselling author, and the founder of the Søberg Principle, the peer-reviewed scientific finding published in Cell Reports Medicine in 2021 that became the foundation of the Thermalist® Method.
Her work has been discussed by Andrew Huberman and Joe Rogan on The Joe Rogan Experience, featured in The New York Times, The Times, and The Guardian, and applied by wellness operators and practitioners in more than 25 countries.
Invited keynote speaker at FIBO, the Global Wellness Summit, and Eudēmonia Summit, speaking on the science of contrast therapy, the Thermalist® Method, and the ROI of structured recovery in premium wellness and hospitality.
Her work has reached some of the world's highest-performing athletes and business leaders.
Science-backed contrast therapy
Our work began with a fundamental scientific question:
What actually keeps humans healthy over time?
Early research focused on how the body responds to stress, temperature, and recovery.
The roots of health: clinical relevance
The question was explored in humans, looking at brown fat activation and metabolism with cold water immersion and sauna. Years of clinical research followed. The goal was not optimisation but relevance: outcomes that are measurable, repeatable and meaningful for long-term health.
Scientific validation
In 2021, this work was published in a peer-reviewed scientific journal. The findings showed how regular cold and heat exposure affects the body's temperature regulation and metabolism, and became the basis of the Søberg Principle.
From research to system
The scientific framework was refined, tested and applied in real-world settings. From it, we built a system of contrast therapy programmes that are science-based, repeatable and adaptable to everyday life.
Led by experience and backed by science
Thermalist® programmes are built on human biology and years of research into how the body adapts to cold, heat and recovery. These are responses that can be trained to support long-term health, and every session is designed around them.