The paradox of the optimisers: what neuroscience tells us about productivity and breaks at work

I have been all in for optimisation, and I still am. But the way I do it has changed dramatically.

There was a time when everything had to “count”.

Leaving work at the last minute to squeeze in one more email. Then biking to pick up the kids as fast as possible to turn it into a workout, while also listening to a podcast to learn something new. And when things got busy, the obvious response was to push harder. No breaks. Working longer hours to get one more thing done.

When things get busy, the usual instinct is to push harder. Fewer breaks. Shorter pauses. This should translate into more output. But it usually only translates into more work, at the expense of the same or even less output.

Optimisers often struggle most with this because rest and thinking time can feel indulgent when there’s so much to do.

What happens to our productivity when we skip breaks at work

Applying neuroscience to understand productivity at work can shed light on two key aspects:

1.    Cognitive resources decline with sustained use

Every time we focus, decide, plan, respond, or switch tasks, we draw from finite cognitive resources. These processes rely heavily on the prefrontal cortex, the brain’s executive control centre responsible for attention, decision-making, and emotional regulation.

With sustained use, this system reduces its performance because the brain has biological limits. Mental fatigue is a normal outcome of continued use without breaks.

As cognitive resources decline, it becomes harder to sustain:

• clear thinking

• emotional regulation

• high-quality decision-making

  
  

We may still be busy, but the quality of our thinking drops.

2. Continuous doing reduces thinking quality

Continuous doing leaves less time to think, which is when the magic happens.

When we move from task to task without pauses, the brain has little opportunity to consolidate information, spot patterns, or make new connections. We become faster at doing, but poorer at thinking.

Another network in the brain, known as the default mode network, becomes more active when we pause, rest, or let the mind wander. This network supports integration, perspective-taking, creativity, and meaning-making. It helps connect dots and see the bigger picture.

When we optimise for constant efficiency, we suppress this network and keep the brain locked in execution mode.

This is where many productivity approaches fall short. They focus on doing more and faster, without accounting for the need for thinking time and cognitive resource management.

The paradox of efficiency and productivity

Here lies the paradox.

When we optimise for constant efficiency, we keep the prefrontal cortex permanently switched on and block out the very processes that help us generate insight and new solutions.

Research in the neuroscience of productivity consistently shows that short breaks, mind-wandering, and even brief moments of doing nothing improve problem-solving and decision quality.

When we remove pauses to “save time”, we often remove the conditions needed for high-quality thinking at work.

Breaks are not the opposite of productivity. They are a different form of cognitive work.

What makes breaks effective for thinking and decision-making

Not all breaks are equal. From a neuroscience perspective, effective breaks tend to have three qualities.

They help regulate the nervous system. When stress levels come down, the prefrontal cortex becomes more accessible again, supporting clearer thinking and better decisions.

They create space for integration. Letting go of active problem-solving allows the brain to connect ideas in the background. This is why insights often appear when we stop trying so hard.

They restore perspective. Stepping out of doing mode makes it easier to notice what we are doing and deliberately choose a different approach. Often, that shift in perspective is enough to move forward.

How to build sustainable productivity without burning cognitive resources

Breaks are not time off from work. They are part of the work.

Everyone can build short pauses into the rhythm of the working day. Even two minutes of stopping, without input or problem-solving, can make a difference.

For leaders managing teams, the impact is amplified. When leaders take breaks openly, talk about them, and reflect on the results, they legitimise a healthier and more effective way of working. Encouraging teams to experiment with breaks is not about lowering standards, but about improving thinking quality and long-term performance.

A simple experiment to improve thinking quality at work

You can try this this week.

Schedule one short pause each day.

Nothing to do. No problem to solve.

Notice what happens to the quality of your thinking afterwards.

If you feel uneasy when you slow down, that does not mean you are doing it wrong. It means you are breaking a habit. Keep going!

That's where change begins.