As the annual performance review looms, I find myself in a familiar place, reflecting on the year and thinking, "Wow, this has been a lot, really tough!" and then, a little lightbulb goes off, yes, I had the exact same thought last year!
If you've ever felt this way too, you're not alone. It's actually a common human experience that highlights a fascinating interplay between our psychology and our brain's wiring. Whether we're excited for a slow-burn transformation or complaining that the pace of change is glacial, one thing is certain, change and adaptation takes a toll, cognitively and emotionally.
Imagine you have a personal account with the bank of Adaptation Energy. Why? Well psychologists view our capacity to cope with new situations (whether positive or negative) as a finite resource. So, every time we learn a new software system, adjust to a new team member, or even embrace a new goal, we draw from our personal adaptation energy account. If you have had a year full of micro-changes (new policies, shifting priorities, exciting new projects, and good changes like promotions), you're constantly depleting this bank account. Now factor in some macro changes and whatever other gifts for growth life has offered you in 2025 so far and it’s not surprising you may be starting to feel the burn!
Our brain's biology provides a universal truth which is that our prefrontal cortex, the brain's executive control center, (responsible for planning, decision-making, and error correction) has to go into over-drive during change. When a routine task changes even ‘ever-so-slightly’, the brain can no longer rely on those existing efficient, automatic neural pathways. It has to consciously analyse the new situation, inhibit old habits, and create new ones. This cognitive load consumes varying amounts of mental energy (glucose), and can lead to feelings of fatigue.
Our brains crave certainty and stability because predictability is metabolically cheap. When things are stable, the brain can save energy. Change, by its very nature, introduces unpredictability. This triggers the threat detection system (the amygdala) even if the change is positive. A new project or promotion, for example, may be great, however it also introduces unknowns and newness, be it people, a new lead, responsibilities etc. all keeping the amygdala on high alert.
I am working on reframing the thought, "this year is tough" and instead I’m trying to choose to recognise it as a sign of psychological and neurological growth. It is the signature of a brain that has been actively re-wiring, adapting, and growing. So, as you head into that performance review, don’t forget to take a moment to acknowledge your evolution too!



