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Analyze: HRV (Heart Rate Variability)

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, also called the R-R interval. 

The Fitrockr Heart Rate Variability (HRV) Report automatically derives key HRV indices from BBI data recorded by a wearable. 

The HRV report can be viewed in the Fitrockr Research & Control Center or downloaded and imported into third party tools.  

The HRV Report will provide the following key indices: 

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.

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

SD1/SD2: ratio of SD1 to SD2.

VLF: power in the very low-frequency range (0.0033 – 0.04 Hz).

LF: power in the low-frequency range (0.04 – 0.15 Hz).

HF: power in the low-frequency range (0.15 – 0.4 Hz).

LF/HF: ratio of LF to HF power.

TP: total power.

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

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