Recovery Profile: Morning vs. Nocturnal HRV Data

General
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Hello,

I’d like to ask about the recovery profile that Athletica builds. Athletica uses HRV from overnight recordings, but I measure HRV every morning for 3 minutes with HRV4Training and a chest strap. I can also send overnight HRV data from my Oura Ring to Athletica.

Which data should be considered valid—morning or overnight? Based on the articles and studies I’ve read, morning measurements seem more important for adaptation because they reflect readiness for the current day.

What is most suitable for Athletica’s system: should I send morning or overnight HRV data?

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SLEEP HRV is best for identifying chronic/systemic stress, while the morning HRV is best for understanding whether you’re ready for a workout.

The first is for assessing stress, the second for training readiness…this is how I evaluate it.