Grit vs. a Dysregulated Nervous System
When does perseverance strengthen performance, and when does it erode it?
Grit is often celebrated in the professional space. We admire the person who pushes through discomfort, who works long hours, and who refuses to quit. And in many contexts, perseverance is necessary. Long-term commitment builds mastery, and effort builds skill.
But there is a difference between resilient persistence and chronic physiological bracing. Sometimes what we call grit is actually a dysregulated nervous system running on stress chemistry. And over time, that dysregulation can become debilitating.
Healthy Grit Is Regulated
Building healthy resilience doesn’t feel hectic or like urgency.
It looks like:
Sustained effort toward a meaningful goal
The ability to interrupt your initial stress response and approach situations with curiosity
Sufficient recovery after exertion
Intensity without chronic urgency
When your nervous system is regulated and engaged, you can bypass overwhelm. There is activation, but there is also access to perspective.
Resilience in this sense doesn’t just represent toughness; it builds capacity.
Dysregulated “Grit” Feels Different
Dysregulated grit often hides in high-performing environments. It can look productive from the outside, but internally it feels like:
Constant pressure and internal irritability
Inability to relax
Difficulty celebrating achievement
Inability to sufficiently recharge, despite trying
Feeling like you are always bracing or waiting for the next shoe to drop
Instead of steady effort, it feels like white-knuckling your way forward. The body remains in a prolonged sympathetic state, constantly hypervigilant and slightly on edge.
You’re still functioning, but you don’t feel settled. Over time, this feeling becomes normalized in the body, and the tension begins to feel like identity. You might even justify it, “This is just how things are,” or “I just need to keep grinding until things improve.” And we frame it as discipline, but left unchecked, it can lead to burnout.
The Physiology at Play
The nervous system is designed to activate under stress. When a challenge appears, heart rate increases, attention narrows, and energy rises. Our mind attempts to adapt to accommodate the situation.
The problem is not the activation of the nervous system, but rather chronic activation without adequate recovery. Prolonged stress contributes to what researchers refer to as allostatic load: the cumulative wear and tear on the brain and body from repeated exposure to stress.
Over time, this affects:
Executive function
Emotional regulation
Cognitive flexibility
Sleep and recovery
Decision clarity
You can out-grit fatigue for a while, but eventually your biology catches up. Eventually, your clarity narrows, reactivity increases, and creativity declines. The very state that once fueled performance begins to undermine it.
High Performance Does Not Require Chronic Bracing
The most sustainable high performers are, in fact, the most regulated. They can hold pressure without becoming pressurized. They pursue ambitious goals without urgency, living in survival mode. They can support their performance with adequate recovery.
What recovery and sustainability look like, however, is individual. For one leader, six hours of deep, uninterrupted sleep may be restorative; for another, eight hours is non-negotiable. Some perform best within a clear structure and defined expectations. Others think more expansively when given autonomy. One person may feel energized by a fast-paced environment, while another produces better work when there is space to think and respond deliberately. Sustainable performance is not one-size-fits-all. It requires self-awareness.
Caught in the Trap
Many high performers were rewarded early in life for pushing through discomfort: earning high grades, achieving in athletics, or advancing professionally.
The internal message becomes: “Work harder.” “Don’t slow down.” “If you rest, you fall behind.”
Over time, this striving becomes our identity. When we frame achievement as the sole indicator of success, we can convince ourselves that we need to push for it at all costs. If we are not careful, rest can begin to feel unsafe, and calm can feel uncomfortable. And when slowing down creates discomfort, we might subconsciously keep pushing the goalpost forward, dismissing small wins and reinforcing a perpetual state of “striving.”
A More Useful Question
Instead of asking: “How can I push harder?”
Try asking: “Am I persevering…or am I bracing?”
Perseverance feels intentional and expansive. Bracing feels urgent and narrow. The distinction is subtle, but your body knows.
Sustainable Strength
This is not an argument against grit, but an argument for greater regulation.
You can pursue excellence…and be in a calm state most of the time.
You can stay committed…and not feel constricted.
You can tolerate discomfort…and learn to embrace it.
You do not need to live in chronic tension through the process.
The strongest leaders are not the ones who never stop, but those who can continually engage without living in survival mode. That difference is what makes performance sustainable.