Hey {{first_name|there}},
Last weekend I jumped on a train and an hour later I was in Brighton by the sea, in the sun.
By Sunday morning my HRV was 30% higher than my London baseline.
That shocked me. Again. My London flat is about as optimised as a home environment gets. Blackout curtains, filtered air, PEMF, the full stack. And a single weekend by the sea beat all of it.
Here's why that makes biological sense.
Look at the buildings nearest the Brighton seafront. The metal rusts. Everything corrodes. That's sodium in the air, and it tells you something important about what you're breathing.
Coastal air is loaded with negative ions. The sea generates them constantly as waves break and water evaporates. The air is also more hydrated, which means your sinuses don't dry out the way they do in a city. Instead of breathing dry, positively charged indoor air, you're breathing something your respiratory system actually recognises.
The research backs this up. Negative ions have been consistently linked to reduced inflammation in the airways, improved heart rate variability, and lower cortisol. Your sinuses stay hydrated. Your nervous system settles.
My HRV confirmed what the research says. The sea was doing biological work my apartment stack couldn't replicate.
I also spent time in the sauna, which brought up something else.
Most swimwear is made from polyester, nylon or elastane. Plastic, essentially. In cold water that's one thing. In a hot sauna, when your pores are fully open and your skin is absorbing everything around it, wearing synthetic fabric against your body is exactly what I'd normally go out of my way to avoid.
I wear natural fabrics as a default. Cotton underwear, merino layers. The sauna is no different.
I had my Earthcove trunks with me. At least 98% certified organic cotton. It's a small thing, but it's the kind of small thing that compounds every time you make the same choice again.
England isn't the warmest country. But it's an hour from coastline that is doing something to your biology that no supplement or device can fully replicate.
One thing worth doing this week
Check what you're wearing in the sauna or the gym.
If it's polyester or nylon, your pores are open and your skin is absorbing whatever that fabric is off-gassing under heat.
Swap one item for a natural fabric alternative. Cotton, merino, linen. It doesn't have to be expensive. It just has to not be plastic.
Look after yourself,
Tim 💚
P.S. The idea of building health into how you live every day, not just when something goes wrong, is exactly what the Eudēmonia Summit is about. West Palm Beach, Florida, 5 to 8 November. Talks, movement classes, treatments, and the latest health technology to try in person.
I'll be there. Use code TIM10 for 10% off any Standard or Enhanced badge.