Friday, 25 April 2025

CAR

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Here’s a clean summary table of the concept:


🌅 Summary Table – Cortisol’s Morning Surge (Cortisol Awakening Response, CAR)

Aspect Details
What is it? A rapid spike in cortisol (up to 60%) within 30–45 minutes after waking up.
Name Cortisol Awakening Response (CAR)
Function Helps the body transition from sleep to alertness; boosts energy, focus, and readiness for the day.
Why It Happens Part of the body’s circadian rhythm—regulated by the brain’s hypothalamic-pituitary-adrenal (HPA) axis.
Benefits Improves cognitive function, supports immune readiness, and enhances metabolic activity in the morning.
Disruption Causes Irregular sleep, stress, burnout, depression, or shift work can blunt or exaggerate CAR.
Clinical Relevance CAR is a biomarker for stress resilience, HPA axis health, and is used in research on mental health and burnout.

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