The HRV status summary message holds the nightly heart rate variability status: last night average, weekly average and the personal baseline range they are compared to.
timestampDateTimeMoment the message refers to, in UTC. FIT stores it as seconds since the FIT epoch (December 31, 1989, 00:00:00 UTC); decoders usually expose it as a regular date.
Average nightly RMSSD over the last 7 days.
Average RMSSD over last night.
Highest 5-minute RMSSD value of last night.
Upper boundary of the low range of the 3-week baseline.
Lower boundary of the balanced range of the 3-week baseline.
Upper boundary of the balanced range of the 3-week baseline.
statusEnumHRV status: balanced, unbalanced, low, poor or none.
balancednonelowpoorunbalancedmesgNumStringGlobal message number identifying the kind of message. Decoders use it to know which profile to apply to the data.