What stress is doing while you cope with it

“I’m managing” is one of the least informative sentences in the language. It reports a self-assessment, and self-assessment turns out to be a poor guide to what stress is actually costing. There is a more literal measurement — allostatic load — and it is made of blood markers rather than feelings.

The measurable version

Allostatic load is the cumulative physiological cost of adapting to stress. The literature calls it wear and tear on the brain and body. The point is that adapting is not free: the systems that help you cope run at a cost, and the bill accumulates whether or not you notice.

It is measured unglamorously, through a panel: systolic and diastolic blood pressure, waist-to-hip ratio, BMI, HDL cholesterol, the total-cholesterol-to-HDL ratio, triglycerides, HbA1c, C-reactive protein and cortisol.

Notice what is absent from that list. Nobody asks how stressed you feel.

What the research links it to

Higher allostatic load is associated with poorer outcomes across immune, cardiovascular and metabolic function.

A study in the Journal of the American Heart Association found higher allostatic load associated with up to a 21% higher risk of major cardiac events within two years among patients diagnosed with breast, lung or colorectal cancer.

And a large analysis using the All of Us Research Program examined the relationship between perceived stress and measured load. That the question needs asking at all tells you something: the felt experience and the physiological cost are related but are not the same measurement.

Getting used to something is not the same as it costing less. Adaptation is the mechanism that produces the load.

Why capable people carry it longest

There is a cruel logic to who ends up with the highest load. It is not the people who cannot cope. It is the people who can.

If your response to pressure is to absorb it, you remove the signal that would otherwise force a change. Nothing visibly breaks. Nobody intervenes. The arrangement is sustainable in every sense except the physiological one.

Each round is evidence for the identity, and the identity takes the next round. This works until a marker on a blood test moves.

Two conclusions that are not reliable

“I’ve adapted, so I’m fine.” Adaptation is what generates the load. Feeling less of it is not the same as it costing less.

“I feel terrible, so something must be physiologically wrong.” Feeling depleted is real and worth attending to, but it is not itself a measurement.

The unglamorous, useful move

Most of that marker panel appears on a standard blood test and a blood-pressure cuff. If you have been running hot for years, that is a far more informative conversation with a doctor than an inventory of how tired you feel.

A limit worth naming

Allostatic load is a research construct, not a clinical diagnosis. There is no single agreed formula — studies use different marker sets and different cut-offs, which is why papers are still proposing new ways to measure it. It is a way of thinking about cumulative cost, not a number you can be assigned.

It also sits inside circumstances. Much of this literature concerns populations under sustained economic and social pressure, where the load is produced by conditions rather than choices. Treating that as a personal-management problem would be both inaccurate and unkind.

This is one pattern. The wider idea behind it — that behaviour sits downstream of identity — is set out in what identity coaching is, and the case for working at that level is in why identity coaching.