HeartMath programs use a sophisticated algorithm to quantify the state of physiological coherence. This process involves real-time mathematical analysis of Heart Rate Variability (HRV) data.
1. Data Collection (IBI)
The process begins by measuring the continuous stream of Inter-Beat-Intervals (IBI). This is the precise time, measured in milliseconds, between each successive heartbeat.
2. Frequency Analysis
The software analyzes a “sliding window” of the most current 64 seconds of IBI data.
-
This data is sampled and updated every 5 seconds.
-
The algorithm performs a power spectrum analysis to identify the distribution of frequencies within the heart rhythm.
3. The Coherence Peak
In a state of coherence, the heart rhythm becomes highly ordered and resembles a smooth sine wave. In the power spectrum, this shift causes the rhythm’s energy to concentrate into a single, high-amplitude peak.
-
High Coherence: Most of the energy is concentrated in or around a single peak within the coherence range.
-
Low Coherence: The energy is scattered across multiple frequencies, indicating an irregular or “noisy” rhythm.
4. Scoring and Ratios
The program compares the power of the “coherence peak” against the rest of the spectrum to determine a Coherence Ratio.
Your final score (Low, Medium, or High) is determined by how that ratio compares to two specific thresholds. These thresholds adjust based on your chosen Challenge Level:
-
Low Coherence: Points are generally deducted.
-
Medium & High Coherence: Points are awarded and accumulated.
5. Real-Time Feedback
Throughout your session, these points are continuously updated and reflected in your Achievement Score. This provides immediate feedback on your ability to shift into and maintain a coherent state.