Melatonin supplementation in the middle of the night: Improved sleep, HRV and RHR?
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The video includes references to papers:
Melatonin and human aging.
https://pubmed.ncbi.nlm.nih.gov/15582288/
Photoplethysmography of heart rate variability in 8,000,000 individuals: A cross-sectional analysis.
https://pubmed.ncbi.nlm.nih.gov/33328029/
Inter- and intraindividual variation in resting daily heart rate, its association with age, gender, sleep, body mass index (BMI), and the time of year. Retrospective longitudinal cohort study involving 92 457 adults.
https://pubmed.ncbi.nlm.nih.gov/32023264/
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