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Decision Making Starts in a Low-Stress State
High performers often assume they make their best decisions under pressure. In reality, the brain makes higher-quality strategic decisions when stress levels are regulated.
When cortisol and sympathetic nervous system activity are elevated for long periods, the prefrontal cortex (responsible for planning, reasoning, and judgment) becomes less active while the amygdala becomes more dominant. This shifts decision making toward reactive thinking rather than strategic thinking.
Creating space to think — even brief periods of calm — improves cognitive performance, problem solving, and leadership judgment.
Ways to improve decision quality:
• Step away briefly before major decisions
• Slow breathing (down-regulates sympathetic drive)
• Walk or light movement to reset physiology
• Sleep on non-urgent decisions when possible
Better physiology → better cognition → better decisions.
Research:
Arnsten, A. (2009). Stress signalling pathways that impair prefrontal cortex structure and function.
McEwen, B. & Morrison, J. (2013). The brain on stress: vulnerability of the prefrontal cortex.
Thayer, J. et al. (2012). Heart rate variability and neurovisceral integration in decision making.
