This episode explores how deliberate cold and heat exposure can improve metabolic health through activation of brown fat, increased insulin sensitivity, and reduced inflammation. Dr. Susanna Søberg explains the science behind cold shock, shivering, and the benefits of temperature variation, recommending as little as 11 minutes of cold exposure per week.
Summarized by Podsumo
Cold exposure as short as 1–2 minutes per session can activate brown fat and boost metabolism, with 11 minutes total per week being effective.
The 'Soberg principle' of ending on cold forces the body to heat itself, prolonging metabolic benefits for hours after exposure.
Sleeping in a 19°C room for one month increased brown fat and insulin sensitivity, even under a duvet.
Heat exposure (sauna) for 57 minutes per week, combined with cold, provides synergistic benefits for cardiovascular and metabolic health.
Brown fat activation occurs through skin cold receptors, triggering norepinephrine release and glucose/fat clearance from the bloodstream.
"It should be hard because that's the point of it. If you enjoy it, something is wrong. You should not enjoy it. — Dr. Susanna Søberg"
"The changes in temperature is what is strengthening your cells in the body. — Dr. Susanna Søberg"
"If we can decrease inflammation in the body, we will decrease our modern lifestyle diseases. — Dr. Susanna Søberg"