Your Stress Response
Built for survival, not modern life
Your fight-or-flight response evolved to escape predators. Today it fires during traffic jams, work emails, and social media scrolling - with devastating long-term effects.
The cortisol cascade
Stress triggers the HPA axis: hypothalamus → pituitary → adrenals. Cortisol floods your bloodstream, raising blood sugar, suppressing immunity, and sharpening focus - great for 5 minutes, toxic for 5 months.
Match the stress hormone
Match each stress hormone to its primary role.
Not all stress is bad
Hormesis - short, controlled stress - makes you stronger. Cold exposure, exercise, and fasting all trigger beneficial stress responses. The key difference: acute vs chronic.
True or False
All stress accelerates aging equally.
Key Takeaway
Your stress response is a superpower - when it's short-lived. The goal isn't to eliminate stress, but to recover quickly and avoid chronic activation.