The emWave2 HRV display is a sophisticated window into your autonomic nervous system. Unlike the Breath Pacer, which is pre-programmed to move smoothly, the HRV Display (Heart Action Strip) reflects the raw, beat-to-beat changes in your heart rate.
1. Understanding the HRV Wave
The moving series of blue lights on the Heart Action Strip follows your heart rate as it accelerates and decelerates.
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In Stress: The wave will look jagged or “jerky,” often hovering around the center of the strip with very little upward or downward movement.
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In Coherence: The wave transforms into a smooth, sine-wave-like pattern. Your goal is to use the Quick Coherence® Technique to create a rhythmic rising and falling motion.
2. Decoding the HRV Range Indicators
The emWave2 indicates your HRV Range—how much your heart rate varies from its highest to lowest point—using dimly lit indicator lights at the ends of the strip. Because range naturally decreases with age and chronic stress, the device scales itself to match your physiology.
| Indicator Lights | Range Value | What it Means |
| 4 Lights (Top & Bottom) | 5 BPM | Narrow range; often seen during high stress or fatigue. |
| 3 Lights | 10 BPM | Standard range. |
| 2 Lights | 15 BPM | Good physiological resilience. |
| 1 Light | 20+ BPM | High range; indicates excellent autonomic flexibility and health. |
The “Fewer is Better” Rule: As you successfully reduce stress and increase coherence over time, you will notice the number of indicator lights decreasing. This is a visual sign that your HRV range is expanding.
3. Advanced Mode Goals
If you are practicing in Advanced Mode, you have two simultaneous objectives:
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Increase Coherence: Keep the top light Green (High Coherence).
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Maximize HRV Range: Focus on making the HRV wave travel as high and as low as possible on the strip, aiming to reduce the number of indicator lights shown.
4. Troubleshooting a “Stuck” Wave
If your HRV wave is barely moving or stays in the center of the strip:
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Breathe Deeper: Ensure you are using heart-focused breathing (5 seconds in, 5 seconds out).
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Check Placement: If the signal is weak, the wave may not display correctly. Re-warm your earlobe and reposition the clip.
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Address Distractions: Mental “chatter” or physical movement can dampen your HRV wave. Try closing your eyes and focusing purely on a feeling of appreciation.
