HRV Biofeedback

Real-Time Nervous System Feedback

HRV biofeedback shows you how your breathing directly affects your nervous system, turning mindfulness from a subjective experience into something you can see and measure.

What Is HRV?

Heart Rate Variability measures the variation in time between heartbeats. Higher HRV generally indicates better stress resilience, stronger parasympathetic tone, good recovery status, and cardiovascular fitness.

Requirements

Apple Watch (Series 4 or newer recommended), watch worn during session, and HRV permissions enabled in Apple Health.

How It Works

Start a breathing session, xHeal connects to your Apple Watch, real-time HRV appears on screen, and you watch how HRV responds to your breathing.

Reading the Display

HRV Value (in milliseconds): below 20ms is low/stressed, 20-50ms is moderate, above 50ms is good parasympathetic activation. Individual baselines vary - compare to your own average. HRV Trend Line shows how HRV changes throughout session. Ideally see HRV increasing, rhythmic fluctuations aligned with breath, and gradual overall increase. Coherence Indicator shows how well heart rhythm is synchronized with breathing.

Using Biofeedback Effectively

Start without looking - begin normally. After a few minutes, glance at the display. Experiment with slower vs faster breathing, longer exhales, visualization, and different sounds. Do not force it - paradoxically, trying too hard can lower HRV.

Post-Session Summary

Shows average HRV, starting vs ending HRV, peak HRV, and time in high-coherence state.

Building Skill Over Time

With practice, you will reach higher HRV faster, maintain coherence longer, improve baseline HRV, and transfer the skill to stressful situations.

Pro Tip: Use HRV biofeedback a few times per week to learn, but do not become dependent. The goal is internal awareness you can access anywhere.