5 Reasons to Try Cold Water Swimming - Hormones, Perimenopause and Neurodivergent Nervous Systems
There's nothing like a dip in cold water to kickstart your senses and make you feel truly alive.
Have you ever tried cold water immersion? Even if only because the hot water ran out?
Or maybe, like me, you're a fan of cold water activities.
If you're navigating fluctuating hormones, perimenopause or a neurodivergent nervous system, the cold water swimming benefits for women go a lot deeper than you might think.
I LOVE to winter surf, which in the UK means the water is usually around 8 degrees, and my wetsuit is doing a lot of heavy lifting. After a session, I often rinse off at the beach with whatever's available, either a cold outdoor shower if I'm lucky or a large bucket and a garden spray bottle if I'm not.
The luxury is deafening.
But I love it. And the feeling afterwards goes on way longer than the dip itself. That slightly shivery, uplifted, quietly buzzing sensation that hangs around for hours. It's something I've now built into my daily morning ritual, apart from the week of my period, and I genuinely feel better for it.
So why should you try it?
1. It wakes you up
When cold water hits your body, it's a bit of a shock. Your oxygen intake increases, your heart rate goes up, and your brain switches on faster than any amount of coffee manages.
If you've been chasing full alertness since 7 am and still haven't found it, a cold shower will do the trick.
2. It increases circulation and cold tolerance
As cold water hits your body, it constricts circulation on the surface and pushes blood to circulate faster through your deeper tissues to maintain temperature.
For those of us with Raynaud's or poor circulation (hello), the more you expose yourself to cold, the better your tolerance gets over time.
3. It supports perimenopausal bodies
During perimenopause, both oestrogen and progesterone decline, and this also depletes serotonin and testosterone. So finding natural ways to boost those levels matters.
Cold water triggers the release of dopamine, serotonin and endorphins, which is exactly what a perimenopausal (and ADHD) brain is gasping for.
4. It supports neurodivergent nervous systems
For those of us with ADHD or autism, our nervous systems are often already running hot. ADHD brains naturally have lower dopamine levels, and autistic nervous systems are frequently dealing with sensory overload, dysregulation and the mental load of masking all day.
Cold water gives you something concrete and physical to focus on. One sensation, one moment, and everything else drops away.
It's also worth noting that some perimenopause symptoms and neurodivergence traits overlap in ways that are genuinely hard to unpick. If you're navigating both (I like to call it the peri peri menopause), this might be one of the more useful things you try.
5. It reduces DOMS after exercise
Studies have shown cold water immersion is one of the most effective ways to reduce muscle soreness, fatigue and inflammation after physical exercise.
If you can't get to open water, running the shower head directly on sore areas works too. Particularly effective on the thighs after a big snowboarding day. (Speaking from experience.)
How long do you actually need to stay in?
Not as long as you think.
Dr Susanna Søeberg, author of Winter Swimming, suggests around 11 minutes a week total is enough to feel the benefits. That's roughly 2 to 4 sessions, each lasting 1 to 5 minutes. The rule of thumb is... the colder the water, the less time you need.
She also mentions that the neck and chest region, where the vagus nerve runs, are the key areas to submerge. The vagus nerve is your body's main parasympathetic (rest and digest) highway. The theory is that getting cold water to that area helps shift you from fight-or-flight into rest-and-digest, which is where those calm, uplifted feelings come from afterwards.
⚠️ Please don't dunk your head in a river. To check whether your swimming spot is safe, download the Safer Seas and Rivers app.
How often?
You don't need to do this every day, and there's a reason why you shouldn't.
Part of what makes cold water so effective is the shock of it. Your nervous system responds to the unexpected. Do it the same way at the same time every single day, and your body adapts, and you lose some of that effect.
Side note - if you have a heart condition or any cardiovascular concerns, please check with your GP before trying this. Cold water shock is a real thing.
A few times a week rather than daily seems to be a good balance for most people.
One exception for me personally... I skip it during my period. It just doesn't feel good in my body that week, so I don't do it.
Blue Spaces
I love being in, on, or by the sea, walking by a river, or even just the sound of water, it genuinely has a measurable effect on my mood, stress and how present I feel.
Dr Catherine Kelly, author of Blue Spaces, has spent 25 years researching exactly this. Her work explores why being near water makes us feel better.
You don't have to be in the water to feel the benefit of it.
So if cold dips feel like too much, or just not your thing, just being by water definitely counts.
An important caveat
A lot of the cold water information you see online has been created in a very male-centric way (Wim Hof, I'm looking atchu). Brilliant in their own way, but it doesn't always account for fluctuating hormones, perimenopausal bodies, or neurodivergent nervous systems running on empty.
If your capacity is already depleted, you're in burnout, or if your nervous system is already maxed out, throwing it into extreme cold might not be what it needs right now.
When you plunge into cold water, it spikes cortisol and your sympathetic nervous system (fight-or-flight) before the parasympathetic (rest-and-digest) kicks in. If your system is already running on fumes, that spike is just another demand on a body that's already struggling to keep up.
So if that's you, your frayed and tattered nervous system won't thank you for plunging into icy cold water.
You could start with a warm shower, then finish with 30 seconds of cold water for a bite-sized cold-water experience. Or just go and sit by the sea or a river and take a moment to be present.
On days when an icy plunge doesn't appeal, or I'm alone, or the rivers are running too high, I go for the warm shower and cold blast option.
And as Dr Catherine Kelly's research on blue spaces shows, it will absolutely still be beneficial.
Always listen to your body. It's usually telling you something worth hearing.
What have I noticed?
From my own time with cold water, here's what's shifted for me...
- Better cold tolerance over time. (Raynaud's and I have reached a tentative peace.)
- A much-needed dopamine boost, especially on low motivation days.
- That shivery, uplifted feeling that lingers for hours afterwards.
- Sustained morning focus without the mid-morning slump.
- Faster muscle recovery after exercise.
And it's also an excuse to stand in a freezing river with a friend, commiserating about how you somehow tweaked your back just by sitting in a chair. Because that happens now, apparently. And it helps to know you're not alone in that. Co-regulating with others, it turns out, is its own kind of medicine.