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Insights & biomarkers
Heart Rate
Respiratory Rate
Heart Rate Variability
ANS Balance
Morning Readiness Score
Acute Mental Stress Score
Mental Health Risk (coming soon)
Resonant Breathing Score
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Heart Rate Variability

General

Heart Rate Variability, or HRV for short, is a non-invasive measure of your autonomic nervous system, which is the body’s main control center. It is widely considered as one of the best objective metrics for physical fitness and determining your body’s readiness to perform. HRV is literally the variance in time between the beats (NN interval) of your heart.

A commonly used statistical metric for representing short-time HRV (over a time duration of the order of 10s to 1 min) is the Standard Deviation of NN intervals (SDNN). The definition and additional contextual information of each output is outlined below in the table.



Output

SDNN is returned as an integer on a scale of 0 - ∞ as a part of the output response JSON, with the key sdnn.

Output (milliseconds)

Definition

Example Color Indicator

Example User Text

0 - 35

Below average

Red

Your heart rate variability value is below average. This indicates your body is under pressure for some reason which could be due to exercise, psychological proceedings or any other external and internal stressors.

35 - 100

Average - Healthy

Yellow

Your heart rate variability is in a normal range. To further increase your heart rate variability you can perform aerobic and/or breathing exercises or meditation.

>100

Above average – Excellent

Green

Your heart rate variability is above average which general states that the body has a stronger capability to cope up with stress or is recovering strongly from previously built-up stress.

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TABLE OF CONTENTS
General
Output