圣母大学NetHealth项目的研究人员对600多名大学生进行了为期2至4年的智能手表数据分析，发现静息心率遵循着复杂的生物节律模式1。研究表明，约70%的参与者的静息心率呈现出缓慢的超日周期节律1，这些节律独立于外部世界运作，代表了一种新发现的生物学现象。
在参与者中，13%的人展现出周期性节律、37%呈现月周期节律、50%呈现多月周期节律1。在这些节律周期内，静息心率可能波动多达15次/分钟1。值得注意的是，在表现月周期节律的参与者中，有20%为男性1，这提示月周期波动可能不仅由生殖激素所解释。研究成果已发表在《EBioMedicine》期刊上1。
A multi-year analysis of smartwatch data from over 600 university students has uncovered previously unknown biological rhythms in resting heart rates, according to research published in EBioMedicine.1 The study, conducted by the NetHealth project at the University of Notre Dame, found that 70% of participants exhibited slow biological rhythms independent of external factors, representing a new category of ultra-circadian rhythms.1 These rhythms operated on multiple timescales—weekly, monthly, and spanning up to ten weeks—with resting heart rates fluctuating by as much as 15 beats per minute between peaks and troughs within each cycle.1
The research categorized participants' rhythmic patterns into three types: 13% showed weekly cycles, 37% displayed monthly patterns, and 50% exhibited rhythms lasting several months.1 Among those with monthly cycles, 20% were men, suggesting that monthly variations in resting heart rate extend beyond reproductive hormones alone.1 The findings highlight that individual resting heart rates follow personalized biological rhythms that operate on a slower timeline than the well-known 24-hour circadian cycle.1 The research was supported by grants from the Australian Research Council and the National Health and Medical Research Council of Australia.1
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