In the past two weeks, I have been testing a Coros watch to collect HRV data in the night (this is a feature currently in beta if you have a Coros watch).
The data looks very good, with good agreement between the Oura ring and Coros watch during this period of time, which included some meaningful variability (recent suppression below normal range). I am using a Coros Apex Pro 2 for data collection and have previously validated the Oura ring in its ability to collect accurate data in the night (see here).
We are working with Coros to get this in the next version of HRV4Training.
In the meantime, if you have the Coros beta firmware, you can already use night data with Manual Input, entering it as part of the questionnaire, as covered here.
Or even better, you could take a morning measurement, which I highly recommend as the best protocol for endurance athletes. You can find some useful resources on this at the links below.
Thank you for reading.
Marco holds a PhD cum laude in applied machine learning, a M.Sc. cum laude in computer science engineering, and a M.Sc. cum laude in human movement sciences and high-performance coaching.
He has published more than 50 papers and patents at the intersection between physiology, health, technology, and human performance.
He is co-founder of HRV4Training, advisor at Oura, guest lecturer at VU Amsterdam, and editor for IEEE Pervasive Computing Magazine. He loves running.
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Twitter: @altini_marco.
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