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Heart Rate Variability (HRV) Report

Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval. 

The Fitrockr Heart Rate Variability (HRV) Report automatically provides key HRV indices that can be viewed in the Fitrockr Admin & Research Center or easily downloaded and imported into third party tools.  

(1) Go to on a web browser

(2) Enter your login and password

(3) Navigate to “Reports” > “HRV”

(4) Users: select one or more users to be included in the report.

(5) Time Period: select the from/to dates to be covered by the report.

(6) Measurements: select one or more timeframes to be included in the report. If you select 0:00-24:00, you will get all day metrics. If you select 8:00-12:00, you will get the metrics for this timeframe each day only.

The HRV Report will provide the following key metrics: 

Min BBI: lowest BBI.

Avg BBI: average BBI.

Max BBI: highest BBI.

SDNN: standard deviation of the IBI of normal sinus beats (SDNN) 

RMSSD: root mean square of successive RR interval differences.

SD1/SD2: ratio of SD1 to SD2.

PNN50: percentage of successive RR intervals that differ by more than 50 ms.

LF/HF: ratio of LF to HF power.

Garmin Connect users: please note that Garmin Connect users will be excluded from report results. Reason is that Garmin Connect does not provide raw BBI data.  

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