Reset your nervous system this winter
Most of us understand stress as a mental experience: something that happens in the mind when life feels overwhelming. But stress is fundamentally a physiological event. When the nervous system perceives threat or overwhelm, the body floods with cortisol and adrenaline, heart rate rises, digestion slows, and the immune system suppresses. This is the sympathetic nervous system in action: our ancient survival architecture, doing exactly what it was designed to do.
The problem is that modern life keeps this system chronically activated, often at a low-level hum that we have normalised as simply ‘feeling stressed’. Over time, this chronic activation has measurable effects on physical health: elevated blood pressure, disrupted sleep, compromised immune function, increased inflammation, and a heightened risk of anxiety and depression.
The good news is that the parasympathetic nervous system, our rest-and-repair mode, is always available. We simply need to activate it deliberately. The pathway for doing so runs through the body rather than the mind, which is why thinking yourself calm rarely works as well as we hope. What does work is direct physiological intervention.
The vagus nerve is the body’s primary parasympathetic pathway, running from the brainstem through the heart, lungs and digestive tract. Stimulating it directly – through slow exhalation, humming, cold water on the face, or gargling with water – activates the parasympathetic nervous system within seconds. This is not metaphor: vagal activation measurably reduces heart rate and cortisol.
Warm–cold contrast therapy is another powerful tool. A warm shower followed by a brief cool rinse, a warm bath with a splash of cold water at the end, or alternating warm and cool compresses can stimulate circulation and support nervous system regulation. The contrast doesn’t need to be extreme, gentle is effective. This practice helps the body adapt to temperature changes and supports resilience during colder months.
Try this simple reset: sit quietly and breathe in for four counts, then exhale for eight. The longer exhale is key, as it directly stimulates vagal tone. Do this for three to five minutes. For a faster result, splash cold water on your face, or cup cold water and submerge your face for 15 to 30 seconds. The diving reflex triggered by cold water on the face is one of the most powerful and immediate nervous system resets available to us.
Winter’s slower pace and longer evenings create a natural invitation to build these practices into daily life. Together, these rituals create a sense of steadiness. Winter becomes calmer when the nervous system feels supported, and small daily resets help keep stress manageable and the body grounded.
