Three crashes. Same signal. Three different causes.
HRV detects the stress. Annotations explain it. The difference is in what you do next.
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Each case study uses real, anonymised user data to demonstrate one specific reading of the human body. These are the patterns that only become visible when biomarkers, notes, and daily context are compiled in one place.
Future case studies will cover training load and resting heart rate, and how subjective check-ins predict objective biomarkers.