Your Vagal Tone Changes With Age. Here Is What That Means.
Vagal tone is a measure of how well your vagus nerve is functioning. Research suggests it naturally declines as we get older, but the rate of that decline is not entirely out of your hands.
What Is Vagal Tone?
Your vagus nerve is the longest cranial nerve in your body, running from your brainstem to your abdomen. It connects to your heart, lungs, gut, and immune system. Vagal tone refers to the activity level and responsiveness of this nerve. It is most commonly measured through Heart Rate Variability (HRV), the variation in time between each heartbeat.
Higher vagal tone is associated with better stress recovery, healthier digestion, stronger immune regulation, and improved mood. When vagal tone is low, the body tends to stay in a sympathetically dominant state, struggling to shift from alertness into rest and repair.
How Vagal Tone Declines With Age
Research across large population studies consistently shows that HRV decreases with age. This decline is steepest between the ages of 20 and 45, then gradually levels off. The pattern holds across both sexes, though males tend to show slightly higher HRV than females until around age 50, when the gap narrows.
Average HRV (RMSSD) by age. Data compiled from WHOOP, Elite HRV, and peer-reviewed clinical studies. Individual results vary significantly.
This decline is not purely biological. Chronic stress, poor sleep, sedentary behaviour, and inflammatory diet all accelerate the process. Conversely, people who maintain active lifestyles, practise stress management, and prioritise recovery tend to preserve higher vagal tone well into later life.
Why the Decline Matters
As vagal tone drops, several body systems are affected. The vagus nerve acts as a brake on your stress response, and when that brake weakens, the body spends more time in a sympathetically dominant state. Over time, this can contribute to difficulty sleeping, increased anxiety, digestive problems, and a less responsive immune system.
The connection between declining vagal tone and age-related health changes is an active area of research. What is clear is that HRV is increasingly viewed as a meaningful biomarker of overall physiological resilience.
The positive news
Unlike many markers that decline with age, vagal tone responds well to targeted interventions. Measurable improvements have been observed within weeks using a combination of natural techniques and non-invasive stimulation. Even small improvements in vagal tone can have a meaningful impact on stress recovery, sleep quality, and digestive comfort.
What You Can Do About It
Whether you are in your twenties looking to maintain strong vagal tone or in your fifties looking to rebuild it, the same principles apply. Consistent, targeted effort produces results.
Natural approaches
Slow breathing exercises, regular physical activity, cold exposure, meditation, and dietary changes can all support better vagal tone over time.
Explore natural methodsNon-invasive stimulation
Transcutaneous vagus nerve stimulation delivers gentle electrical pulses to the auricular branch of the vagus nerve, providing a direct, measurable boost to vagal activity.
How stimulation worksTest your vagal tone
Our free assessment takes a few minutes and gives you a personalised picture of where your vagal tone sits today. It is a useful starting point.
Take the testUnderstand the nerve
Follow the vagus nerve from ear to gut in an interactive scroll journey. See where it goes, what it does, and why keeping it healthy matters.
Start the journeyBetter is within reach
Vagal tone is not fixed. With the right approach, you can support your nervous system at any age. Find the device that fits your life.
Find your deviceCheck Your HRV Against Your Age
Enter your age and sex to see where your Heart Rate Variability sits on the population curve, and how much vagus nerve stimulation could improve it.
Find Your Expected HRV
Key Insights
- Age Decline: HRV naturally decreases with age, declining approximately 10-15% per decade from age 20-65.
- Gender Differences: Males typically have slightly higher HRV than females until around age 50, when the gap narrows.
- Range Variation: The vertical bars show the middle 50% of values - meaning half of people fall within these ranges.
- Individual Variation: These are population averages. Your personal HRV can vary significantly based on fitness level, lifestyle, and genetics.
- Improving HRV: Regular exercise, quality sleep, stress management, and vagus nerve stimulation can help maintain or improve your HRV regardless of age.
Data Sources: WHOOP (65,000+ users), Elite HRV (24,000+ users), and peer-reviewed clinical studies. Hover over any point on the graph to see exact values.