What founders mistake for hustle is just HPA dysregulation

The founder mythology loves a good war story. You are told to wear your exhaustion like a credential, that 4am starts and midnight finishes are the price of admission. This mistakes the buzz of a nervous system stuck in high alert for productivity. That feeling of being wired, unstoppable, and utterly spent all at once is the clear, blaring signal of a system running on emergency power, and the emergency never ends. Your body keeps a very honest set of books, and it does not care about your five-year plan. The relentless 'hustle' is a biological state of alarm. You are running on cortisol, a very expensive fuel, not passion.

The high cost of cortisol as fuel

Your body's central command for dealing with threats is the hypothalamic-pituitary-adrenal (HPA) axis. When you perceive a challenge—a pitch deck that needs redoing overnight, a key employee threatening to quit—this system initiates a cascade. Your brain signals your adrenal glands to release hormones, primarily cortisol. This is your 'go' signal. It sharpens focus, mobilises glucose for energy, and dials down non-essential functions like digestion and repair. It's a brilliant system for outrunning a predator or nailing a single, high-stakes presentation. It is designed for sprints.

A founder’s life is a marathon of sprints with no finish line. The 'threat' is constant, showing up as payroll deadlines, new competitors, and looming board meetings. Your HPA axis, which has no concept of a quarterly business cycle, responds to each one as if it were a life-or-death situation. It just keeps pumping out cortisol.

This is the state you call 'hustle'. It feels like heightened focus and infinite energy. For a while, it works. But your body pays for it by deferring maintenance. Repair processes are paused. Your immune system is suppressed. Your digestive system runs at half-speed. You are accumulating a huge backlog of essential work, like a restaurant kitchen that serves a thousand meals but never stops to clean the pots or restock the pantry. The eventual crash is not a matter of if, but when.

Chronic cortisol exposure rewires your brain. The same hormone that delivers a sharp, tactical edge in the short term begins to prune neural connections in your prefrontal cortex—the part of the brain for complex planning and emotional regulation. At the same time, it strengthens connections in the amygdala, your brain's threat-detection centre. The net effect is a slow erosion of your ability to think strategically. You become less able to hold conflicting ideas, and your decision-making defaults to the safest option, not the smartest one. Employee questions start to sound like threats. Your thinking becomes more rigid and binary, a terrible state for anyone whose job is to navigate ambiguity and invent the future.

Related anchors: sleep anchor · HRV anchor · burnt-out anchor

HRV tracks your physiological budget

Before the exhaustion and cynicism set in, there is a quieter signal. It shows up in your Heart Rate Variability (HRV). HRV measures the tiny, millisecond variations between your heartbeats, reflecting the flexibility of your autonomic nervous system (ANS). High HRV indicates a resilient, well-rested system that can shift gears smoothly between stress and rest. Low HRV indicates a system under strain—one that is rigid, losing its ability to adapt, and stuck in 'on' mode.

The 'always on' founder lifestyle is a systematic campaign against your HRV. The lack of deep sleep, the constant cognitive load, the reliance on caffeine, and the absence of real downtime all drive it down. You might feel powerful closing a deal at 11pm in Dubai, but your HRV reading the next morning tells the real story: your capacity to handle the next challenge is diminished. It is the physiological equivalent of your phone battery showing 20% after a full night on the charger.

Chasing a high HRV score with a breathing app five minutes before you check it is like trying to fix your company's cash flow by finding a twenty-dollar bill on the street. It misses the point. The value is in the trend line, read over weeks and months. You might notice, for example, that your HRV drops 15 points every time you fly east and takes four days to recover—data you can use to schedule your next trip. Or you might see that your HRV is consistently higher on weeks when you have a hard stop at 6pm, a clear signal about the true cost of those 'just one more thing' evenings. A low HRV also has a felt sense: the snap of irritation at a simple question, the inability to hold opposing ideas, the feeling that every small obstacle is a personal attack. Learn to read it as a weather forecast for your internal state. It is the most honest feedback you will ever get on your leadership capacity.

The physiology of a supportive team

The myth of the lone genius founder is one of the most damaging in business culture. It presumes a leader is a self-contained unit of willpower and vision. This is biologically false. Your nervous system is permeable. You are constantly, unconsciously reading and responding to the states of the people around you. This is coregulation.

When you are in a room with a calm, grounded person, your own nervous system can borrow some of that regulation. Your breathing might slow. Your shoulders might drop. This is physiological. A functional team, a supportive co-founder, or even a good coach is more than emotional support. They are external hardware for your own nervous system, like plugging into a more stable power grid.

A dysregulated leader is an expensive drag on the entire system. Your clipped tone in a meeting and your inability to listen when your own mind is racing are physiological events that ripple outwards. Your team's nervous systems will register your stress as environmental threat. They will shift into a defensive, low-trust mode, hoarding information and avoiding risks. You will spend the next week wondering why everyone is suddenly so passive-aggressive and uncreative, without realising you set the weather in the room.

By isolating yourself, by believing you have to carry the entire load alone, you deprive your body of this essential resource. You force your own HPA axis to do all the work of managing your state, a task it was never designed for. This is why so many founders who power through the early years alone hit a wall. Their success outpaces their physiological ability to sustain it. Building a regulated team and a supportive personal environment is a core part of building a sustainable business that sustains its founder. This is a strategic investment in your own capacity.

Common Questions

But isn't some stress necessary to build something great?

Yes, but you have to distinguish between productive, short-term stress (eustress) and chronic, unremitting stress. Eustress is the challenge that helps you grow—the pressure of a deadline that focuses the mind. The goal is to get better at cycling between productive stress and a state of repair, not to eliminate stress entirely.

My HRV is low but I feel fine. Should I be concerned?

Think of low HRV as an early warning light on a car's dashboard. The car's still running, but the engine is under strain. You might feel fine because you are running on stress hormones, which can mask fatigue. A consistently low HRV suggests your adaptive capacity is shrinking, making you more vulnerable to illness, cognitive decline, and the eventual burnout crash. It is an invitation to act now, not when you are already on the side of the road.

What's the first practical step I can take to change this?

Stop treating rest as a reward for finishing your work. Your work is never finished. Schedule a non-negotiable 20-minute 'system shutdown' at the end of your workday. This means no screens, no calls, no 'quick check' of your email. Go for a walk. Listen to music. Stare out of a window. The activity does not matter as much as the signal it sends to your nervous system: the threat is over for today. You are safe to stand down.

Can my team's stress really affect my own nervous system?

Absolutely. If your team is running in a state of chaotic, anxious urgency, your nervous system will register that as a threat environment. You will spend unconscious energy managing your own state and theirs. This is why leaders who fail to create psychological safety burn out so quickly. They are trying to coregulate an entire dysregulated system by themselves.

Closing

• For Founders: If you recognise your own patterns here, my one-on-one founder coaching program is designed to help you rebuild your capacity from the nervous system up.
• For Leaders: To bring this understanding to your entire organisation, the Nervous System at Work certification provides the tools to build a truly resilient and high-performing culture.
• For Everyone: Start by reading your own signals. Download the free guide on how to conduct a personal capacity check-in.

TL;DR

The 'founder hustle' that leaders glorify is a state of chronic HPA axis activation. This constant emergency mode, driven by elevated cortisol, degrades your physiological capacity, lowers Heart Rate Variability (HRV), and makes burnout inevitable. True, sustainable performance comes from managing your nervous system's energy budget, not from celebrating adrenaline. It requires deliberate cycles of recovery and recognising that your body's state dictates your company's potential. Lasting success is a function of physiological regulation.

Sources

• Adam, E. K., et al. (2017). Diurnal cortisol slopes and mental and physical health outcomes: A systematic review and meta-analysis. Psychoneuroendocrinology, 83, 25–41.
• Epel, E. S., et al. (2024). Caregiver Load and Telomere Attrition: A 10-Year Longitudinal Study. Molecular Psychiatry.
• Freudenberger, H. J. (1974). Staff Burn-Out. Journal of Social Issues, 30(1), 159–165.
• Maslach, C. (2016). Understanding the burnout experience: Recent research and its implications for psychiatry. World Psychiatry, 15(2), 103–111.
• Miller, G. E., et al. (2007). If it goes up, must it come down? Chronic stress and the hypothalamic-pituitary-adrenocortical axis in humans. Psychological Bulletin, 133(1), 25–45.