Why women overheat differently — and what that means for her health and longevity
There is a sentence I find myself returning to whenever I speak about women’s thermal physiology: the female body does not thermoregulate the same way a male body does. This is not a matter of degree. It is a matter of mechanism.
Most of the foundational research on thermal therapy cold water immersion, sauna use, contrast therapy, even the basic physiology of thermoregulation, was conducted predominantly on male subjects. This was not malicious. It was the default in research design for decades, justified by the belief that hormonal variation in female subjects created confounding variables that made data harder to interpret. The result is a substantial body of knowledge about how the body responds to thermal stress that is implicitly male, applied universally to a population that is half female.
This matters because estrogen does not just influence reproduction. It is deeply embedded in the systems that govern temperature regulation, cardiovascular response to thermal stress, autonomic nervous system function, sleep architecture, and inflammatory modulation. When you remove estrogen from the equation — or when you extrapolate from male data without accounting for it you lose something essential about how the female body actually works.
For those who want to build a sustained, personalised approach to thermal practice that accounts for the full complexity of female physiology across twelve weeks, the Søberg® 12-Week Reset does exactly that it is not a fixed protocol, it is a guided system for building your own.
The Søberg® 12-Week Reset — soeberginstitute.com
If you are newer to cold and heat exposure and want to start with the foundations first, the Thermalist® Method at Home course covers the core science and practice in a 3.5-hour self-paced format.
The Thermalist® Method at Home course covers the intersection of breathwork and thermal practice for your own journey at home. It is the foundation before anything else.
Thermalist® Method at Home — soeberginstitute.com
The hypothalamus as thermostat
The hypothalamus is the brain region responsible for maintaining core body temperature within its narrow optimal range. It receives continuous input from thermoreceptors across the body and adjusts peripheral blood flow, sweat rate, and metabolic heat production in response. In men, this system operates with relative hormonal stability across weeks and months. In women, it is continuously modulated by the hormonal environment.