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TUESDAY, March 31, 2020 (HealthDay News) — Variability in bedtimes may be detrimental to cardiovascular health, according to a study published online March 23 in npj Digital Medicine<\/i>.<\/p>\n
Louis Faust, from the University of Notre Dame in Indiana, and colleagues examined the association between bedtime regularity and resting heart rate (RHR) as a biomarker for cardiovascular health. The analysis included data from the Fitbit Charge HR, including bedtimes, sleep, and RHR from 557 college students (including 255,736 nights of data).<\/p>\n
The researchers found that going to bed even 30 minutes later than one’s normal bedtime was associated with a significantly higher RHR throughout sleep (coefficient, +0.18), which persisted into the following day and converged with one’s normal RHR in the early evening. There was also a significant association for bedtimes of at least one hour earlier and higher RHRs throughout sleep; however, they converged with one’s normal rate by the end of the sleep session and did not extend into the following day.<\/p>\n
“Through our study, we found that even if you get seven hours of sleep a night, if you’re not going to bed at the same time each night, not only does your resting heart rate increase while you sleep, it carries over into the next day,” a coauthor said in a statement.<\/p>\n