EBioMedicineAug 21, 2026

Multiday cycles in heart rate patterns in healthy adults

Circadian Biology Weekly Brief ↗PubMed ↗DOI ↗

Updated Aug 22, 2026

Abstract

Infradian rhythms, which occur over periods longer than 24 hours, are prevalent in human physiology.

These rhythms may influence hormonal regulation and various health conditions.
Despite evidence of their widespread presence, the mechanisms behind infradian rhythms are not well understood.
Current research is limited by a lack of comprehensive longitudinal data.
New wearable technologies could enable continuous and detailed monitoring of physiological rhythms in individuals.

Simplified

Chronobiology research has historically focused on circadian rhythms; however, longer infradian rhythms are prevalent in human physiology and may have important implications for health and wellbeing. Previous studies have identified widespread infradian rhythms across human physiology, often in the context of hormonal regulation and disease. Despite growing evidence of their ubiquity, the mechanisms, significance, and clinical relevance of these rhythms remain poorly understood, largely reflecting a lack of longitudinal datasets and robust detection methods. The emergence of new wearable technologies enables rich, continuous data capture within individuals, allowing physiological rhythms to be studied at scale.

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Multiday cycles in heart rate patterns in healthy adults

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