The Hidden Energy Cost of High Performance

Some of the employees closest to burnout may also be the ones still delivering their best work. Máire Crouchman explores why strong output can sometimes conceal rising cognitive and emotional strain; and why sustainable performance requires leaders to look beyond whether the work is getting done.    

Some of the people closest to burnout are often the least obvious.

They are still hitting targets. Still answering quickly. Still staying late. Still volunteering to take something else on. They are often the person everyone describes as “reliable”. And that is precisely why their struggle can remain invisible.

Performance tells us what someone produced. It does not tell us what it cost them cognitively or emotionally to produce it. That distinction matters.

In many organisations, wellbeing concerns only become visible when something changes: productivity drops, absence increases, deadlines are missed or behaviour becomes noticeably different. By that point, however, an employee may have been operating beyond a sustainable level for months.

High performance can hide strain remarkably well. Some people respond to pressure by slowing down or withdrawing. Others respond by working harder, becoming more perfectionistic, checking repeatedly, extending their hours or becoming increasingly reluctant to ask for help. The output may remain strong while the internal cost of maintaining it continues to rise.

The Same Workload Does Not Create the Same Load

This is where cognitive diversity becomes particularly important.

Two employees can be given exactly the same workload, attend the same meetings and work within the same environment, yet experience very different levels of cognitive demand. One may leave a day of back-to-back meetings feeling energised. Another may need significant recovery time before they can concentrate deeply again. One person may interpret a vague brief as freedom. Another may spend considerable cognitive energy trying to work out what “good” actually looks like.

Constant context switching, interruptions, unclear priorities, sensory demands, social expectations and rapidly changing deadlines do not affect everyone in the same way. This is particularly relevant when we consider neurodivergent employees, but it is not limited to neurodivergence. Stress, poor sleep, grief, caring responsibilities, illness, hormonal changes and prolonged uncertainty can all affect the amount of psychological bandwidth someone has available at any given time.

The question therefore should not simply be: “Can this person do the job?”

A better question is: “What is it currently costing this person to do the job well?”

High Performance Is Not the Same as Sustainable Performance

Organisations understandably value resilience. But resilience should not be measured by how long someone can continue functioning in an environment that is consistently overloading them.

Sustainable performance requires recovery, clarity, psychological safety and enough cognitive capacity to respond to inevitable periods of pressure.

If an employee can only maintain their performance by working late every evening, constantly overriding exhaustion, masking difficulty, avoiding breaks or sacrificing life outside work, the organisation may still be seeing strong performance. But it is borrowing against future capacity.

Eventually, that cost appears somewhere. It may look like disengagement. Irritability. Increased mistakes. Physical illness. Emotional exhaustion. Absence. A sudden resignation.

And because the employee “seemed absolutely fine”, the change can appear unexpected.

Often, it was not sudden at all.

Leaders Need to Become Curious Before Performance Drops

Managers do not need to diagnose employees or monitor their emotional lives. They do, however, need to create conditions where strain can be identified before it becomes crisis.

That begins with curiosity.

Instead of immediately interpreting a change in behaviour as poor attitude or reduced commitment, leaders can ask what may have changed around the person. Have priorities become less clear? Has workload increased without anything being removed? Is the employee spending most of their day switching between competing demands? Have they stopped taking breaks? Are they repeatedly compensating for gaps elsewhere in the system?

Leaders should also be cautious about assuming that silence means capacity.

High performers are often the people organisations trust with more. Their competence becomes the reason they receive additional work, greater responsibility and fewer check-ins. The very behaviour that makes them valuable can make their overload less visible.

Designing for Sustainable Performance

Employee wellbeing cannot sit solely within wellbeing programmes. It is also influenced by how work itself is designed.

Clear priorities, realistic workloads, autonomy, predictable communication, protected focus time, opportunities for recovery and psychologically safe conversations are not simply wellbeing initiatives. They are performance infrastructure.

In practice, this can be as concrete as protecting a genuine block of uninterrupted focus time each day, removing one responsibility whenever a new one is added rather than simply layering it on, or making it normal for a stretched employee to renegotiate a deadline without it being read as failure.

These are not indulgences. They are the conditions under which good work remains possible.

The future of high performance will not be about extracting more from people who appear capable of carrying it. It will be about designing work in a way that protects the cognitive capacity on which performance depends.

The strongest leaders will not only ask: “Are my people delivering?”

They will also ask: “What is it costing them to keep delivering like this, and is that cost sustainable?”

Source: Contributed article by Máire Crouchman.