Essentials: Cold & Heat Exposure for Metabolic Health | Dr. Susanna Søberg

Deliberate cold exposure functions as a potent tool for metabolic health by activating brown fat, a tissue that regulates body temperature and improves insulin sensitivity. Dr. Susanna Soberg explains that the "cold shock" response—characterized by increased heart rate and norepinephrine release—triggers this metabolic activation. Research indicates that a total of 11 minutes of cold exposure per week, combined with regular sauna sessions, significantly enhances glucose clearance and reduces systemic inflammation. The "Soberg principle," which involves ending cold exposure sessions without immediate external warming, forces the body to generate its own heat, thereby sustaining metabolic activation and mitochondrial efficiency for hours. Even modest temperature changes, such as sleeping in 19-degree Celsius rooms or brief cold plunges, effectively stimulate these physiological adaptations, offering a practical, low-threshold approach to improving cardiovascular and metabolic resilience.