Why Winter Hits So Hard — What’s Really Happening to Your Nervous System (And 8 Ways to Reset)
Winter is doing something to your body right now — and most people have no idea it's happening.
You might be sleeping more but waking up exhausted. Feeling flat, a bit foggy, less motivated. Getting every bug that goes around. Craving comfort food and wondering why your mood has quietly taken a dip.
This isn't weakness. It's your nervous system adapting to the season. And once you understand why it's happening, you can actually do something about it.
Your Nervous System Has Two Sides — and Winter Pushes You Towards One of Them
You probably know that your nervous system has two sides.
The sympathetic nervous system is all about fight or flight. This is our stress response in an emergency — but it will also respond to perceived emergencies. It is the part of the nervous system we have honed for survival and is found in your thoracic spine — your mid back.
The parasympathetic nervous system handles resting and digesting. Interestingly, the nerves for this are found in your cervical and lumbar spine — your neck and lower back.
How Winter Shifts Your Nervous System
So, what happens to our nervous system when winter arrives? It adapts significantly between the seasons.
One of the strongest regulators of our nervous system is light exposure. With winter upon us we get shorter days, which means decreased light exposure to our brain. This can affect sleep, energy levels, and our stress tolerance. Melatonin secretion can increase, leading to that "wired but tired" feeling — or you may wake up feeling groggy and struggle to get out of bed.
Serotonin production may also decrease, leading to lower mood. For some individuals this can be quite severe and debilitating, leading to seasonal affective disorder (SAD).
With the drop in temperature, you may notice more physical tension. Your posture may become subtly more hunched, your breathing shallower, and if you get cold enough to shiver — that's literally muscle contractions. Reduced movement (because it's more appealing to stay indoors) leads to stiffer joints. All small changes, but together they nudge your nervous system toward fight-or-flight mode.
Because we spend less time out and about, our body receives fewer calming cues — from being in nature, from fresh air and sunshine, from exercising. We may also be more socially isolated in winter.
What Chronic Stress Does to Your Immune System
One of your stress hormones is cortisol — and this directly affects your immune system. In short bursts it boosts immunity and limits inflammation. But over time, your immune system becomes resistant to the accumulating messages from cortisol. Your body becomes weary, and therefore resistant to the anti-inflammatory effects.
Chronic stress means more inflammation in your body, increased production of pro-inflammatory cells, and decreased ability to fight infection. Cortisol also increases your susceptibility to infections. This is why so many people get sick in winter — it's not just the cold. It's the accumulated stress on your system.
8 Simple Ways to Reset Your Nervous System This Winter
You don't need an overhaul. You need a few small, consistent things that actually fit your real life.
Deep breathing — This automatically calms your nervous system. You can even add some humming or singing — because who doesn't feel happier doing this!
Stay hydrated — It's hard to keep drinking water in winter, but you can still hydrate. Try herbal or decaffeinated teas, and soups are a great way to get extra fluids.
Maximise your daylight exposure — Move to a desk near a window while at work. Drink your morning cuppa rugged up on the porch. Take a short walk on your lunch break when the sun is high in the sky.
Gentle, frequent movement — Simply rolling your shoulders and doing some quick neck and lower body stretches at your desk counts. Take the stairs. Park further from the front doors. Tiny movements add up.
Use a posture device or rolled towel — If you have time, lay on a posture device or a rolled-up towel for 10–15 minutes at least once (preferably twice) per day to open your chest, extend your mid back, and relax your nervous system. Make sure your head and neck are supported.
Stay on schedule with your adjustments — Chiropractic adjustments not only improve the normal motion and function of your spine — they can help modulate your body's inflammatory response, change the way your brain processes information, and even boost immunity. Your nervous system will love you for it.
Give yourself permission to rest — Unplug from technology. Focus on activities that nurture you. Try a meditation or guided imagery. There's nothing wrong with a nap to reset.
Prioritise sleep — Sleep primes the immune system for the next day. Improving the quality and quantity of your sleep is one of the most powerful things you can do this winter.
Support Your Immune System From the Inside Out
It's important we support, stimulate, and — if we do get sick — repair our immune system during the winter months. Your immune system relies on vitamins A, C, D, E, B6, B12, folate, iron, copper, selenium and zinc. A healthy, colourful diet while reducing processed foods will help you get these in. And if you like mushrooms — add different types to your meals. They enhance immune function, increase resistance to infections, and are anti-inflammatory.
Key supplements worth knowing about:
Vitamin C helps reduce the severity and duration of upper respiratory tract infections. It increases the activity of infection-fighting cells and inhibits viral growth. Find it in brussels sprouts, citrus fruits, capsicum, kiwi fruit, broccoli, cauliflower, strawberries, and kale.
Vitamin D supports healthy immune function — a deficiency is associated with increased susceptibility to infection. The best source is sunlight (UVB radiation). Winter is the perfect time to be outside with some skin exposed while the UV index is under three. Also found in oily fish, eggs, liver, and mushrooms.
Zinc supports healthy immune function and aids the body's natural immune responses. It's crucial to antibody production and has been shown to reduce the severity and duration of colds and sore throats. Combining zinc with vitamin C gives even greater reduction of cold and flu symptoms. Found in oysters, red meat, nuts, and whole grains.
Omega-3s enhance the body's resilience to infection and modulate inflammation. Found in oily fish (salmon, mackerel, sardines, anchovies), chia seeds, flaxseeds, walnuts, and edamame beans.
You Don't Have to Just Get Through It
Winter doesn't have to mean just getting through it. Your nervous system is doing its best but it needs support. The good news? Small, consistent changes make a real difference. The eight things above aren't overwhelming. They're doable. And any one of them, done regularly, will start to shift how you feel.
If you're already feeling run down, stressed, or like your body just isn't recovering the way it should this is a great time to check in. Chiropractic care works directly on your nervous system, helps modulate your body's inflammatory response, and supports your immune function from the inside out.
We'd love to help you feel like yourself again this winter.