Heart rate variability graphs show the rate of changes in the pulse. The changes are influenced by almost any stimulus to the brain or mind, including emotions, thoughts, sound, light, touch, etc. Doctors use heart rate variability to measure the balance between the sympathetic and parasympathetic nervous system. This is due to the two-way communication between the heart and the brain that regulates heart rate and blood pressure. Entrainment ratio shows the coherence of the nervous system to work efficiently or in sync.
Balance occurs when entrainment levels are in the medium to higher range.
Every five seconds the data is updated in relation to the shifts in the heart rhythm. As the data is recorded, the software program takes the ratio of the averages and adjusts the scores to low entrainment, medium entrainment, or high entrainment. The total of the low, medium and high entrainment scores will always equal 100 percent. The entrainment ratios reflect the average levels of entrainment over the entire length of the ongoing session. The heart rate number displays the average heart rate for last 5-seconds of data.