Unique Long-Period Rhythm in Resting Heart Rate Confirmed in Over 600 People
Outlining study of smartwatch data from over 600 people finding weekly, monthly, and ten-week resting heart rate rhythms in ~70%.
Based on an article by Philippa Karoly, Associate Professor, Biomedical Engineering, The University of Melbourne, reported in The Conversation - Technology.
Our new study, published in EBioMedicine, looked at years of smartwatch data from hundreds of young adults, and found that for 70% of the participants, their resting heart rate followed a slow rhythm.
These rhythms had distinct weekly, monthly, or even ten-week cycles, where the number of heart beats per minute would rise and fall in a defined pattern within that period.
Editorial Opinion
We see these findings as demonstrating the value of long-term measurement with wristwatch-type devices. Health management features have centered on displaying daily fluctuations. Design that incorporates weekly and monthly baseline variations is likely to advance. As Meta pauses Conversation Focus charges shows, commercializing wearable devices is difficult. We see that functional differentiation premised on medical collaboration will become important.
In the long term, we expect condition forecasting based on individual cycles to spread. It could be linked to predicting high-risk periods for seizures and heart disease. We assess that a shift from uniform reference values to individualized variation bands will advance. In clinical settings, we see explainability and validation becoming challenges. We assess that measurement accuracy on the device side and the development of operational guidelines will be key.
The remaining issues are the origin and reproducibility of the cycles. The question is whether cycles vary by sex, age, and living environment. The question is how to verify the claim of independence from external factors. The question for users is how to weigh providing long-term records against benefits. We see a need for a framework of transparent consent and management.
References
- “Data from more than 600 people shows resting heart rates have their own secret rhythm”, by Philippa Karoly, Associate Professor, Biomedical Engineering, The University of Melbourne — The Conversation - Technology, 2026-09-13T23:53:14.000Z (CC BY-ND)
- Source URL: https://theconversation.com/data-from-more-than-600-people-shows-resting-heart-rates-have-their-own-secret-rhythm-290635
Frequently Asked Questions
- What is the long-period rhythm in resting heart rate
- It is a fluctuation in which beats per minute at rest repeatedly rise and fall on weekly, monthly, and ten-week scales. As shown in the quoted passages, it exists separately from the 24-hour cycle and was confirmed in about 70% of subjects.
- What kind of records were used in the study
- Daily resting heart rate records collected over two to four years with wristwatch-type devices from hundreds of young adults were used. It is described as a setup suited to detecting cycles that require long-term records.
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