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Twenty-four hour time domain heart rate variability and heart rate: relations to age and gender over nine decades
Umetani, Singer, McCraty, Atkinson · 1998 · Journal of the American College of Cardiology 31(3):593–601
What this work gives Aellic
24-hour norms for 260 healthy people (112 m / 148 f) aged 10 to 99, by decade. The actual primary source for the age dependence of HRV, which Aellic previously misattributed to Shaffer & Ginsberg. The decline is NOT linear: RMSSD falls to 47 % of its starting value by the sixth decade (pNN50 to 24 %) “and then stabilized”. A constant rate of “ms per year of life” cannot be derived from it.
Where this sits in the engine
1 declared site: constants and thresholds in the code that point at this entry.
- Recovery HRV baselines and deviations 1 site