
Your vagus nerve is your built-in stress brake
The vagus nerve connects your brain to your heart, lungs, and abdomen. It’s what triggers a return to calm after a stressful situation. When it's underactive, you can feel it:
- Difficulty calming down after a setback
- A heart that races easily
- Tight stomach, sensitive digestion
- Light sleep, waking up during the night
- Fatigue despite rest
The good news is that its function, vagal tone, can be trained.

















