Here are the HRV readings I have taken this year: The values are based on the RMSSD, normalized on a log scale to a 0-100 score. Outliers are marked red. The line is the 7-day moving average, and the background shading is the activity level for the day (based on step counts), with darker being more active.
High outliers are mostly bad readings (I suspect), and only one of the low outliers corresponded with anything obvious (sore throat).
If there is a signal in that data that reflects exercise “readiness”, it’s clearly being masked by day-to-day noise (caused by a not perfectly regular sleeping schedule and other factors).
Still holding some hope for long-term trends or seasonal patterns…