Why Leaders Carry Tomorrow’s Pressure Today

pres·sure | noun | the exertion of force upon a surface by an object in contact with it.

Sure. Very useful if the pressure in question is a bowling ball. Less useful if it’s Thursday’s board meeting, which technically hasn’t touched you yet and is nonetheless already sitting on your chest at 4am on Tuesday.

Here’s the thing nobody warns you about: your body does not wait for events to actually happen before it starts reacting to them. It has a guy for that. Let’s call him the Forecaster.

Meet the Forecaster

Somewhere in your nervous system there’s a department whose entire job is prediction. Not diagnosis, not analysis after the fact, prediction. The Forecaster doesn’t wait for the board meeting to start before deciding your heart rate should go up. He looks at the meeting sitting on your calendar three days out, checks his historical data on how that room has treated you before, and quietly issues a severe pressure warning well ahead of time.

This isn’t some wellness branding exercise. It’s an actual model in physiology called allostasis, described by physiologist Peter Sterling as regulation built around anticipating what the body will need and adjusting in advance, rather than waiting for something to go wrong and cleaning it up afterward (Sterling, 2012). Translation: your body isn’t just a reactive machine. It is constantly running a forecast, deciding what you’ll need next in terms of energy, alertness and blood flow, and adjusting the settings before the need actually shows up.

Which, frankly, is a very sensible system. If your ancestors waited to feel scared until the tiger had already arrived, they would have been a snack rather than a species. The Forecaster exists so you are already halfway out of your chair before you have consciously registered the danger.

There is a nice, slightly absurd bit of evidence for this from an exercise lab. Researchers told eleven men exactly what workout they were about to do, including a brutal one at 95% of their max effort, then gave them a ten-minute countdown before they actually started. Just from knowing what was coming, their heart rate, oxygen uptake and breathing all climbed during the countdown, before a single rep happened. The ones who got the warning also lasted 14.6% longer once the exercise actually began (Miyamoto et al., 2022). Nobody had moved a muscle, and their bodies were already gearing up for the fight. The Forecaster had already filed his report.

Your Calendar Is His Weather Data

Here is where this gets uncomfortably relevant to your job. The Forecaster does not need a real threat to start issuing warnings. He will happily work off your calendar.

Back-to-back meetings, quarterly reviews, a client escalation booked for Thursday, an executive call at 9pm because someone in another time zone thought that was reasonable: to you, these are appointments. To the Forecaster, they are weather data. He learns your patterns. He clocks that a certain stakeholder always means confrontation, that Monday mornings mean acceleration, that the end of the quarter means your sleep quietly gets worse, that a holiday tends to arrive preceded by a brutal final week and followed by an inbox that requires its own recovery plan. Once he has learned the pattern, he starts responding to the forecast itself, not the actual event. Which is how you can wake up exhausted on a Sunday because Monday is bad, and Monday has not even happened yet.

Modern work makes his job considerably worse. AI speeds everything up, hybrid schedules blur the line between on and off, and there is always another message sitting there implying urgency before you have done a single thing about it. The Forecaster was built for occasional threats with a clear beginning and end, like a tiger. He was not built for a Slack channel that never actually closes. So instead of the occasional alert, he ends up running low-grade forecasts more or less constantly, because to him there is never quite an all-clear. You might not be in a crisis. But he is behaving as if one is permanently ninety minutes away.

The Forecaster Has a Company Card

Here is the part where the analogy gets financial, because it is genuinely the clearest way to think about it. All this preemptive readiness is not free. Every time the Forecaster issues a warning, he is spending something: attention, hormones, muscle tone, sleep depth. Researcher Bruce McEwen gave this spending a name: allostatic load, the wear and tear that builds up when the body’s stress systems get switched on too often, or fail to switch back off once the actual event has passed (McEwen, 1998a). In other words, the Forecaster has a company card, and every warning is a purchase on it.

Used properly, this is a fantastic system. You need the card to work; without it, you would never mobilise for anything that actually mattered. The trouble starts when the Forecaster treats every single meeting like a five-alarm event and never lets the account rest. McEwen described exactly this pattern: systems that fire too often, and systems that simply forget to shut off once the threat has passed (McEwen, 1998b). Which is a very polite, scientific way of describing a guy who never once checks whether the emergency actually ended before he goes and issues another one.

Here is the uncomfortable bit for leaders specifically: you rarely walk into any single meeting as a blank slate. You walk in carrying the last three weeks of purchases on that card. Late nights, difficult conversations, a canceled workout, a flight, another difficult conversation. By the time the actual decision needs making, the room is new but your physiology absolutely is not.

Why Some People Never Get the All-Clear

Most leadership advice focuses entirely on what you do during pressure: how you decide, how you communicate, how you hold it together in the room. Almost none of it asks the far more interesting question: how well do you come back down afterward?

Because here is the catch. If you do not fully return to baseline after one demand before the next one starts, you are not starting fresh. You are stacking. The next meeting begins before the last one has actually finished, physiologically speaking. The next decision gets made with yesterday’s leftover tension still sitting in the system. Do this for long enough and you do not necessarily notice a dramatic breakdown. You just quietly become more reactive, more impatient, more rigid, and a bit less able to sit with something ambiguous for more than four seconds. Nobody files this under allostatic load. Everybody just says you have become harder to work with lately.

And here is where the Forecaster can genuinely start overcorrecting. If your recent history has taught him that work is always urgent and recovery is never guaranteed, he starts issuing warnings almost continuously, whether or not anything is actually happening. Not full panic, just a persistent hum: trouble switching off in the evening, waking at 4am already rehearsing tomorrow’s meeting, feeling tired before the week has technically started. That is not weakness. That is a Forecaster who has learned, from experience, that the all-clear basically never comes, and has stopped waiting for one.

The Blind Spot at the Top

Most organisations only notice any of this once something has already gone wrong: someone gets sick, decision quality drops, a normally open leader turns defensive and nobody can quite say why. By then, the Forecaster has been running hot for months and nobody thought to check the bill.

Worth asking yourself honestly, even if it is a slightly awkward question over coffee. What does your calendar teach the Forecaster to expect? Which meetings put him on alert before they have even started? Do you actually come back down after pressure, or do you just move straight on to the next thing? And be honest: does your team experience your unresolved tension as urgency, impatience or control, because they definitely experience something.

These are not wellbeing questions dressed up to sound serious. They are closer to a supply chain question. If the person making the decisions is running on a system that is permanently forecasting bad weather, the decisions eventually start reflecting that, whether or not the weather ever actually arrives.

The Bottom Line

Allostatic load is not really the cost of stress. It is the cost of a system that keeps preparing for tomorrow’s problems today, on the assumption that tomorrow is always going to be difficult.

Which flips a pretty common assumption on its head. Stress is not only something that happens to you after the fact. A meaningful chunk of it is your own Forecaster, working overtime on your behalf, based on a forecast that might not even be accurate anymore.

The fix probably is not learning to withstand more pressure. It is giving the Forecaster enough evidence, regularly, that the all-clear actually does come, so he stops running the warning system by default.

Because the real question was never how much pressure you can absorb. It is how reliably you actually come back down before the next thing starts.

This article is part of our ongoing exploration of Sustainable Performance through the lens of human physiology.

Author: Giorgio Bruins

Date: September 2026

Sources

Sterling, P. (2012). Allostasis: A model of predictive regulation. Physiology & Behavior, 106(1), 5–15.

Miyamoto, T., Sotobayashi, D., Ito, G., Kawai, E., Nakahara, H., Ueda, S., Toyama, T., Saku, K., Nakanishi, Y., & Kinoshita, H. (2022). Physiological role of anticipatory cardiorespiratory responses to exercise. Physiological Reports, 10(5), e15210.

McEwen, B. S. (1998a). Protective and damaging effects of stress mediators. New England Journal of Medicine, 338(3), 171–179.

McEwen, B. S. (1998b). Stress, adaptation, and disease: Allostasis and allostatic load. Annals of the New York Academy of Sciences, 840, 33–44.