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
Moisture debt is mostly about your clothing system, and heat debt is mostly about your core body temperature.
But performance debt is accumulated primarily in your extremities, including your arms and hands and legs and feet.
And of course, that extremity at the top that encloses your brain.
Performance debt is due when you can no longer manage your thermoregulatory system well enough to maintain fine motor, ambulatory, and cognitive performance.
The value of the thermoregulatory debt model is that it gives us a way to think about the delayed cost of decisions that are related to layering your clothing, your food and water intake, your exertion levels, and your ability to manage fatigue.
First, we talked about moisture debt, the accumulation of moisture from sweating, condensation, and precipitation in your clothing system.
Then we talked about heat debt, the disruption of your body's core temperature from a state of comfortable balance where you start to get cold.
And finally, we talked about the consequences of moisture and heat debt, which is performance debt, your ability to move, to think, and to solve problems.
I know we talked about these three things in a linear order, but of course they are not isolated and they are not always occurring linearly.
They interact with each other.
For example, moisture in your clothing system can create conductive and evaporative heat loss.
It can lead to a drop in core temperature, and that can result in a loss of motor function.
Okay, that's what we talked about.
Likewise, excess heat in your clothing can create more sweating.
So maybe it starts with heat cost.
And then another example is loss of motor function or cognitive ability may cause you to get lazy or otherwise not make layering changes to deal with moisture or heat effectively.
So you can see how these things are all interrelated and how they can form feedback loops.
So yeah, you can see that these three types of debt should be seen as overlapping and interactive with each other and managed as a
whole system.
And this really brings us to the core message today, which is this.
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