Ryan Jordan
speaker
294 appearances
1 recordings
1 series
first heard Jun 2026
last heard 3 Jun
Ryan Jordan’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jun 2026 with 1.
Appearances
When you're warm, you have some margin.
You can afford to lose a little bit of heat, but when you're cold, you lose that margin.
And further heat loss starts degrading your motor and mental functions.
When your body starts reducing blood flow to your extremities, changes you make to your clothing system, your movement strategy, your food intake, your hydration.
or shelter in particularly exposed locations, all these choices now have a bit more impact attached to them.
Because once heat debt starts accumulating, it becomes more difficult to reverse without changing something.
But the reality here is that by the time you feel cold, you often need multiple strategies, not just layering strategies, to restore thermoregulatory balance to your body.
Now heat debt is a problem for three reasons.
I alluded to margin a f a minute ago.
So the first reason heat debt is a problem is that it narrows your safety margin.
A slight chill isn't necessarily dangerous on its own, but it is a warning sign.
It's telling you that your body is losing heat faster than you can replace it.
So if conditions get colder or wetter or windier, or if your activity level slows down or you start operating at a higher caloric deficit, then that small imbalance can become more serious.
Second, like most debt, heat debt is much harder or more painful to repay than it is to prevent.
Once your clothing gets wet, your hands get cold, your energy stores go low, and your body is already shivering, you have fewer easy options.
Adding a jacket may help, but it may not be enough if your base layers are damp and your insulation is compromised, or your body no longer has the fuel or metabolic capacity to generate heat effectively.
Now you probably do need to add some insulation to your layering system, but you may also have to reduce exposure to wind or precipitation, or eat some food, or increase movement to generate metabolic heat.
Or you may
Maybe you even need to stop and pitch your shelter, set up your sleeping bag and get inside for a bit so you can create a better microclimate around your body that allows you to warm up again.
And third, heat debt affects your performance.
Showing 201–220 of 294 · page 11 of 15
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