Do HRV right

1. ECG Time Series Variability Analysis Engineering and Medicine by Cornforth, David Jelinek, Herbert Franz Khandoker, Ahsan Habib, 2018
2. Considerations in the assessment of heart rate variability in biobehavioral research
3. Simple HRV analysis pipeline and documentation from Neurokit2

Water intake increases HRV in a dose dependent manner Water consumption as a source of error in the measurement of heart rate variability Caffeine intake, some medications, alcohol consumption, time of day, exercise, food inatake, water intake and bladder filling influence HRV

4. Statistical considerations for reporting and planning heart rate variability case-control studies
5. Guidelines for Reporting Articles on Psychiatry and Heart rate variability (GRAPH): recommendations to advance research communication