03/14/2026
Could rumination be worse for us than stress?
A common misconception is that stress alone “burns out” the brain.
In reality, our brains are built to handle short-term stress.
What tends to drain the brain more is rumination — repetitive, unresolved thinking loops.
When we replay the same worry or problem over and over without taking action, the nervous system can stay partially activated for hours. It’s not full fight-or-flight, but it’s also not rest. It’s a low-grade alert state that quietly consumes mental energy.
Research in cognitive and affective neuroscience shows that repetitive negative thinking keeps certain brain networks active — especially those involved in self-referential thinking and emotional reactivity. When these networks stay engaged too long, people often experience mental fatigue, reduced concentration, and emotional depletion.
Interestingly, one of the most effective ways to interrupt this loop is movement.
Physical activity shifts neural activity toward motor systems, lowers stress signaling, and reduces activity in brain regions associated with overthinking. Even a short walk can help reset attention and reduce mental load.
A helpful way to think about it:
Stress with action often resolves.
Rumination without action lingers.
Sometimes the brain doesn’t need more thinking — it needs movement, breath, or a small concrete step forward.
In CALM Circles we often talk about this in terms of regulation.
When the body settles, the mind often follows.