Clothes for the cold

Jackie and I went out for a walk this morning, as we do. The double-digit negative windchill seemed to offer a bit in the way of bragging rights, even if it wasn’t nearly as cold as a year ago.

Me and Jackie one year ago, when the temperatures were -16℉

I’ve got a bit more in the way of clothing choices this year, having bought a bunch of cold weather gear for winter running, but I didn’t use much of the new stuff.

I wore my Alaska pipeline coat, of course. Under that I wore my Dale of Norway sweater that Barbara bought on her last trip to Antarctica. Under that I wore a silk mock-T base layer. For my lower body I wore my flannel-lined jeans, which were just the right weight by themselves. (I’ve got a pair of fleece-lined khakis a size larger, big enough to wear tights or something under, for when it’s really, really cold, but I didn’t need them today.) I wore silk sock liners under my usual wool/silk-blend socks, under my new waterproof Lems boulder boots. (I’m very pleased with these boots so far. All the minimal/barefoot features I want, waterproof, and warm enough for the bitter cold.)

The one imperfect thing about the Alaska pipeline coat is that the hood is hugely oversized (I assume so that it can go over a hardhat) and tends to slump down over my face, obstructing my vision. So to keep my head warm I wore the Khyber pass hat that Jackie made me. (If you remember the war in Afghanistan, the Northern Alliance forces wore the same sort of hat. Very versatile—roll it up and it covers the top of your head to keep the sun off. Roll it down and you’ve got a thick wool hat you can pull down over your ears.)

All of that, except the bolder boots, was pretty much what I was wearing a year ago in the picture above, but this year I had one novel item: I wore a buff over my neck and the lower half of my face. It’s just a thin layer of microfiber, but over my beard it was dramatically warmer than just the uncovered beard. I’ve had buffs for years, but I mostly wear them in hot weather (to keep the sun off my neck), so I think of them as cooling rather than warming. It was amazing to find how much of a difference it made just to put a layer over my beard.

Of course you don’t feel like exercising

When you feel sick, you prefer to sit still. This behavior pattern is not only well known, it even has a name: “inflammatory-induced sickness behavior.”

In the modern world this easily leads to a particularly pernicious vicious cycle. Modern lifestyles lead to metabolic syndrome. Metabolic syndrome produces systemic inflammation, which makes you feel like sitting still. Wanting to sit still makes what would otherwise be the most potent tool for reducing systemic inflammation—exercise—tough to bring to bear.

This rather dense article from back in 2010 describes the problem: Inflammatory modulation of exercise salience: using hormesis to return to a healthy lifestyle. It also proposes a category of solutions: hormesis. That is to say, any of a set of mild metabolic stresses that prompt a response greater than “just enough” to stave off the damage produced by the stress itself.

The result is less systemic inflammation, and therefore less inflammatory-induced sickness behavior, hence an increased inclination to move.

Or, as they say:

We therefore propose that exercise salience, the motivation to undertake physical activity, is modulated by the inflammatory status of an animal, decreasing in an inflammatory phenotype, including the metabolic syndrome and increasing in an anti-inflammatory “healthy” phenotype. The type of phenotype may well be determined by the degree of hormesis, as metabolic stressors, such as exercise, plant polyphenols and calorie restriction tend to induce an anti-inflammatory phenotype.

Besides exercise, the article suggests two other broad categories of available hormetins.

One is related to food, and consists of the obvious stuff that everybody knows: Avoid industrially produced edible substances. Consider such modalities as time-restricted eating, calorie restriction, or fasting. Include foods rich in plant polyphenols. (In other words, “Eat food, not too much, mostly plants.”)

The other is related to temperature: Expose yourself to mild cold and/or heat stress. (Spend time outdoors in the winter. Take a cold shower. Spend time outdoors in the summer. Take a sauna.)

Each of these things will produce some mild metabolic stress. As long as you don’t overdo it, that mild stress will produce a stress response greater than necessary to handle the stress itself, with the side-effect of bringing down systemic inflammation. With the systemic inflammation eased, you’ll start feeling like moving again. That puts the potent tool of exercise back on the table.

Nature has a more recent article on all this stuff, which is sadly behind a paywall.