The human body responds to environmental stress differently depending on the type of stress the environment is inflicting.
The human immune system, for example, will produce more of a “heat pump” response in the presence of higher temperatures.
This allows us to tolerate more stressors without losing our innate ability to fight off infection.
A “metric” system, on the other hand, is the more complex of the two systems.
A more basic metric is the average body weight.
The body’s weight, however, plays a role in how well it can tolerate stress.
This is a measure of how well the body can tolerate certain stressors, such as heat and cold.
The more weight we have, the more likely we are to survive.
But, it’s not enough to just be able to survive the stress of heat and/or cold.
There are a few more factors to consider when looking at how well our body is coping with various environmental stresses.
The first factor is our metabolic rate.
Metabolic rate is the number of calories we burn per minute.
We burn a lot of calories at a fast pace, so a higher metabolic rate is good for survival.
The second factor is the amount of fat we have.
Fat, or fat-free mass, is a way to measure how much fat we can remove from the body.
This number can be used to determine how much we can eat at a given time.
The third factor is how much energy we are getting from each calorie.
This means how much of a boost we are actually getting from consuming fewer calories.
A lower metabolic rate means that we’re getting less from each extra calorie we eat.
The fourth factor is what we call our “stress tolerance.”
The stress tolerance metric tells us how well we can tolerate an environmental stressor without losing any of our innate immunity to it.
For example, if the temperature is 70 degrees and we’re trying to survive, we’re going to be able survive the heat, but we’ll also have trouble tolerating the cold.
If the temperature drops to 40 degrees, and we have a few days to prepare for it, we’ll be able cope with the cold without too much stress.
The fifth factor is called the “biological response.”
This metric tells the body how well immune cells, called T cells, are functioning.
If you’re stressed out, your T cells can start to make inflammatory responses that can lead to disease.
If these T cells are functioning well, they’re going the extra mile to fight the infection.
The sixth factor is known as our “immune response” to stress.
These cells have a more powerful response to environmental stresses than the metabolic rate tells us.
If we’re stressed, we have to work harder to adapt to the stressors and we’ll need to expend more energy.
These T cells aren’t getting the help they need to fight infection.
In the end, your metabolic rate and your stress tolerance are going to determine your chances of surviving a stressful situation.