Stress sharpens thinking …until it doesn’t
Not all stress is bad, especially when you know how to use pressure to sharpen rather than cloud your thinking.
Most of us talk about stress as if it is always harmful. But the brain actually needs a certain amount of stress to feel alert, engaged, and switched on. There’s a sweet spot where pressure sharpens focus and lifts performance.
Neuroscientists describe this as an inverted U-shaped relationship between stress and performance. With too little stress, you feel flat and under-stimulated; it is hard to care or concentrate. As stress rises, your energy, motivation, and performance increase. You feel more present, engaged, and “on it”. But push past that optimal zone and performance drops again. You become overwhelmed, scattered, and less effective, even if you are working harder than ever. The exact shape of this curve is individual – different people hit their “just enough stress” point at different levels of pressure.
Under high or chronic stress, the prefrontal cortex (the brain’s executive function centre) becomes less effective, while the amygdala, which drives fight‑or‑flight, takes over. You shift from flexible, objective, open‑minded thinking to more reactive, narrow, and limited thinking patterns. From an evolutionary perspective, our survival depended on responding instantly to danger, so the brain learned to prioritise speed over accuracy.
But in most leadership contexts today, that same shortcut works against you. Instead of widening your view, you slip into old patterns and snap judgements, listen less, and consider fewer options. This makes it much harder to make complex, strategic decisions.
The practical skill is learning to notice when stress is sharpening your thinking and when it has tipped into tunnel vision and reactivity – and then deliberately shifting yourself and your team back into that “useful stress” zone before you decide. The signs are racing thoughts, snap judgements, rigid thinking. Treat them as a cue to pause and reset before you lock in a strategic decision. If you ignore them and push ahead, you are far more likely to double down on flawed assumptions, miss crucial information, and lock in decisions you later regret.
A powerful way to counteract tunnel vision is to refocus on what really matters. What is our core objective here – what really matters? The benefit of pressure is that it forces you to prioritise and get to the essence of the problem, instead of just reacting to whatever feels most urgent. Widening your perspective flips the brain from narrow into broader thinking and starts moving it back towards the stress sweet spot. That’s how stress can sharpen your thinking instead of distorting it.
Photo by Stephanie Llepacki
