Hexoskin automatically calculates HRV values during a rest activity or a sleep activity only.
In fact, based on the literature, HRV values can only be accurately and meaningfully measured during a period with minimal activity and movement. Indeed, it was reported that activity and movement can cause outliers in the ECG signal and then bias the HRV calculation and interpretation (please refer attached document Hexoskin-MeasureHRV).
During a rest activity or by performing a "5 Minutes Rest Test" (under the section Fitness Tests on the Hexoskin App), Hexoskin will automatically provide you with an RMSSD value.
During a sleep activity, Hexoskin calculates automatically other HRV values:
- HRV HF avg
- HRV HF norm min
- HRV HF norm max
- HRV HF avg
- HRV LF norm avg
- HRV LF avg
- HRV RMSSD
Hexoskin provides additional HRV metrics which may be accessed by querying the API. To obtain an API key* to query the API, please contact email@example.com:
* By using your developer's keys you agree to our API Terms and Conditions.
If you want to perform relevant HRV analysis during a wake period, you will need to download your data under Binary format and do your analysis by eliminating the outliers in the ECG signal.
You can use the software HxConvertSourceFile to download multiples files at the time.
On the software, please tick the box "Use Tab '\t' delimiter (used by Kubios) [default is comma ',' delimiter]" when downloading files to open in an HRV analysis software, such as Kubios.
You will then use the NN_interval files to perform your HRV analysis. If you need help or assistance, feel free to contact our Support Team at firstname.lastname@example.org.
Keywords: heart rate variability, HRV measurement, value, nn interval, rr interval