BITESIZE | Do This Every Day to Reduce Stress, Boost Immunity & Increase Resilience | Dr Susanna Søberg #453
This episode features Dr. Susanna Søberg, a leading researcher on cold water immersion therapy, who explains the science behind deliberate cold exposure. She shares practical tips on how to start, highlighting its benefits for physical health, mental resilience, and activating brown fat.
Deep Dive Analysis
7 Topic Outline
Embracing Discomfort and Training the Nervous System
Categorizing the Broad Benefits of Cold Exposure
Societal Comfort and its Impact on Human Physiology
The Role and Activation of Brown Fat
Simple Ways to Incorporate Cold Exposure into Daily Life
Cold Showers and Immune System Benefits
Overcoming Resistance and Building Cold Tolerance
3 Key Concepts
Controlled Form of Stress
This concept refers to intentionally exposing oneself to uncomfortable situations, like cold, to train the nervous system. By conquering these stressful situations, individuals build mental and physical strength and confidence, which can then be applied to other life challenges.
Brown Fat
Brown fat is a special organ in the body that acts as a temperature regulator and significantly impacts metabolism. When activated by cold exposure, it uses glucose and fat from the bloodstream as fuel, helping to increase energy expenditure, lower blood pressure, and reduce the risk of obesity and type 2 diabetes.
Stress Threshold
The stress threshold is an individual's capacity to handle stressful situations. Deliberate cold exposure can increase this threshold, making one more tolerant not only to cold but also to the various stresses encountered in everyday life, thereby widening one's window of tolerance.
6 Questions Answered
Intentionally exposing yourself to discomfort, such as cold, trains your nervous system and brain to become more comfortable in stressful situations. This builds confidence and resilience that can transfer to other areas of life, making you stronger mentally and physically.
Cold exposure offers physical benefits (metabolism, weight loss, immune system, brown fat activation, joint pain relief), mental health benefits (resilience, mood improvement, reduced anxiety/depression), and athletic benefits (recovery and endurance).
Brown fat is a specialized organ that regulates body temperature and plays a crucial role in metabolism. When activated by cold, it uses glucose and fat from the bloodstream as fuel, which can help prevent lifestyle diseases like obesity, type 2 diabetes, and cardiovascular issues.
A randomized controlled trial showed that ending a hot shower with 30-90 seconds of cold water led to participants taking fewer sick days from work, suggesting a boost to the immune system and an increase in beneficial brain chemicals.
You don't need extreme cold exposure. Simple methods like ending a hot shower with 30-90 seconds of cold water, or even lowering your room temperature to around 19 degrees Celsius while sleeping, can activate brown fat and provide significant health benefits.
It's normal for cold exposure to be uncomfortable initially. Start with very short durations, like 5 seconds in a cold shower, and gradually increase the time. Consistency for a few sessions will help you adapt and begin to experience the benefits.
9 Actionable Insights
1. Utilize Cold for Broad Benefits
Engage in cold exposure to gain physiological benefits like improved metabolism, immune system boost, and pain reduction, alongside mental benefits such as enhanced mood, reduced anxiety, and increased confidence.
2. Activate Brown Fat with Cold
Expose your skin to cold temperatures to activate brown fat, an organ that boosts metabolism by using glucose and fat as fuel, helping to prevent lifestyle diseases and improve overall health.
3. Short Cold Shower Boost
Finish your daily hot shower with 30-90 seconds of cold water to potentially boost your immune system and improve your mood, which can lead to fewer sick days from work.
4. Simple Cold Exposure Methods
Integrate cold exposure into your daily life through simple methods like taking a cold shower, cold plunging, or lowering the temperature in your home, rather than feeling the need for extreme, prolonged immersions.
5. Persist Through Cold Discomfort
Persist with cold exposure for at least 3-5 initial sessions, even if it’s uncomfortable, as adaptation takes time and the full benefits are not typically felt immediately.
6. Gradual Cold Exposure Adaptation
Begin cold exposure with very short durations, like 5 seconds in a cold shower, and gradually increase the time as your body adapts, rather than attempting longer periods from the start.
7. Sleep in Cooler Room
Sleep in a cooler room, around 19 degrees Celsius, to increase your brown fat and improve insulin sensitivity, as observed in studies over just one month.
8. Consistent Brown Fat Activation
Regularly activate your brown fat through cold exposure to keep it efficient and ‘alive,’ similar to how muscles need consistent use to remain functional.
9. Consult Doctor for Cold Immersion
Before starting cold water immersion, consult a qualified healthcare professional, especially if you have uncontrolled hypertension or heart disease, to ensure it is safe for you.
4 Key Quotes
Every time you go into the cold, you're pushing yourself to the uncomfortable state. And every time you do that, you get a little bit stronger, not only in your in yourselves, but also in your mind.
Dr. Susanna Søberg
Comfort is killing us.
Dr. Rangan Chatterjee
The brown fat cells, they need to get activated to stay alive. It's like a muscle.
Dr. Susanna Søberg
You don't have to be good at it or good at anything. Actually, this is just going in to the cold is something everybody can do.
Dr. Susanna Søberg
2 Protocols
Building Cold Tolerance
Dr. Susanna Søberg- Start with a very short duration of cold exposure, such as 5 seconds in a cold shower.
- Gradually increase the duration to 10, 15, and then 30 seconds as you adapt.
- Consistently practice for at least three to five sessions to allow your body and mind to adapt and start experiencing the benefits.
Cold Shower for Immune System Boost
Dr. Susanna Søberg- Take a hot shower as you normally would.
- At the end of your shower, switch the water to cold for 30 to 90 seconds.
- Repeat this daily for at least 30 days to potentially reduce sick days and boost your immune system.