Why Elite Athletes are Turning to the Vagus Nerve

When we think of peak performance in elite athletes, what often comes to mind are grueling hours of training, strength, speed, and discipline. But a growing body of neuroscience is now pointing to a less visible—but equally crucial—factor: the vagus nerve.

The vagus nerve is the main highway of the parasympathetic nervous system. It plays a central role in helping the body “rest and digest,” acting as a biological brake that counterbalances stress and arousal. For athletes, this regulation is critical. A well-functioning vagal system helps maintain calm under pressure, accelerates recovery after exertion, and supports focused cognitive function in high-stakes moments.

High vagal tone—typically measured through heart rate variability (HRV)—has been linked to:

• Faster physiological recovery

• Reduced inflammation

• Improved emotional resilience

• Better adaptation to stress

The Science Behind Vagal Regulation

Two key psychophysiological models help explain the relationship between vagal function and performance:

The Yerkes-Dodson Law

This model suggests that performance follows an inverted-U curve in relation to arousal. When arousal is too low, energy and engagement drop. When it’s too high, anxiety and cognitive overload impair performance. The vagus nerve acts like a regulatory brake, helping the nervous system stay within the optimal arousal zone.

Polyvagal Theory

Proposed by Dr. Stephen Porges, this theory highlights how different branches of the vagus nerve influence our physiological state. The ventral vagal branch supports social engagement, calm, and focused attention. Athletes with higher ventral vagal tone are better able to remain composed and cognitively agile in intense, unpredictable situations.

Training the Vagal System: Evidence-Based Approaches

Rather than leaving vagal function to chance, elite athletes are increasingly incorporating vagal-centered strategies into their routines to enhance regulation, resilience, and performance.

Proven techniques include:

• Resonance-frequency breathing: A paced breathing method shown to increase HRV and reduce stress.

• HRV biofeedback: Real-time training using wearable sensors to modulate physiological state.

• Cold water face immersion: Stimulates the vagus nerve through the mammalian dive reflex.

• Transcutaneous auricular vagus nerve stimulation (taVNS): A non-invasive method that stimulates vagal branches in the ear to enhance autonomic regulation.

What the Research Shows

Recent studies provide compelling support for vagal stimulation in athletic contexts:

• A randomized controlled trial found that just one week of daily taVNS significantly increased VO₂ max and peak work rate, while reducing post-exercise inflammation in healthy adults (Ackland et al., 2025).

• A meta-analysis of 19 studies concluded that taVNS can meaningfully enhance cognitive performance, especially executive function, when targeted at vagus-innervated areas like the tragus or cymba concha (Ridgewell et al., 2021).

Together, these findings point to the vagus nerve as a modifiable target—not only for emotional regulation and stress resilience—but also for physical performance and cognitive sharpness.

The Takeaway 

As athletes continue to pursue marginal gains, the autonomic nervous system has emerged as a new frontier. While traditional training builds muscle, endurance, and skill, vagal training builds internal control—the ability to stay centered, adaptive, and efficient in both mind and body.

Whether through breathwork, biofeedback, or non-invasive taVNS devices, training the vagus nerve is becoming a core component of 21st-century performance science.

Train your nervous system, not just your muscles. We can optimize performance through smarter regulation.