The Science of Regulating Your Nervous System | Dr. Kevin Tracey

Apr 27, 2026 Episode Page ↗
Overview

Kevin J. Tracey, MD, neurosurgeon and CEO of Feinstein Institutes, discusses the vagus nerve's role in health, how to improve vagal tone through habits like breath work and cold exposure, and the future of bioelectric medicine for chronic diseases.

At a Glance
7 Insights
1h 17m Duration

Deep Dive Analysis

1. Adopt Core Healthy Habits

Prioritize good sleep, a balanced diet, regular exercise, maintaining a healthy weight, cultivating a positive attitude, and fostering strong social connections. These practices are linked to a slower resting heart rate and higher vagal tone, contributing to overall health and longevity.

2. Perform 3-In, 7-Out Breathing

Inhale for three seconds (with a physiological sniff at the end) and exhale slowly through pursed lips for seven seconds. This 10-second cycle, repeated for a few minutes daily, can amplify the vagal effect on heart rate variability and may reduce inflammation.

3. Take Regular Cold Showers

After a warm shower, switch to full cold water for 1-3 minutes, 2-3 times a week, starting face first while holding your nose. This stimulates the diving reflex and vagus nerve, potentially slowing heart rate and reducing inflammation.

4. Splash Face with Cold Water

To quickly stimulate the diving reflex and slow your heart rate, submerge your face in a bowl or sink of cold water. This can offer immediate anti-anxiety benefits by activating cardiac vagus nerve fibers.

5. Integrate Meditation Daily

Incorporate meditation into your daily routine, either separately or combined with breath work, as it is considered an important part of a healthy lifestyle. Meditation can influence brain regions and breathing patterns, potentially benefiting the nervous system.

6. Exercise Consistently for Health

Engage in regular physical activity, as fit individuals tend to have lower resting heart rates, indicating higher vagal tone. Exercise is strongly associated with improved longevity and delays the onset of many inflammation-related diseases.

7. Observe Heart Rate Recovery

Pay attention to how quickly your heart rate returns to a slow, resting pace after stressful events or exercise. A rapid heart rate recovery indicates good vagal tone and overall health balance.