1. Basal Heart Rate Variations by Day of Week.
- Author
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Malmstrom, Edward J.
- Subjects
- *
HEART beat , *RHYTHM , *DISEASES , *HEMODYNAMICS , *PSYCHOLOGY - Abstract
Previous studies have shown large variations in basal heart rate (HR) in individuals over occasions. To examine long-term variability, one individual's HR was recorded daily for one year. Besides changes due to ambient temperature and periods of illness, obvious regular variations corresponded to day of week. Weekends and Mondays differed from the other four weekdays: HR was high on Saturdays and Mondays, and reached a nadir on Sundays. These fluctuations probably reflect the cultural pattern of activity over the week, rather than representing an intrinsic circaseptan rhythm. [ABSTRACT FROM AUTHOR]
- Published
- 1973
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