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A person's normal resting heart rate is fairly consistent over time, but may vary from others' by up to 70 beats per minute, according to analysis of the largest dataset of daily resting heart rate ever collected. Giorgio Quer of the Scripps Research Translational Institute in La Jolla, California, and colleagues present these findings in the open-access journal PLOS ONE on February 5, 2020 as part of an upcoming PLOS Collection on Digital Health Technology.
A routine visit to the doctor usually involves a measurement of resting heart rate, but such measurements are rarely actionable unless they deviate significantly from a "normal" range established by population-level studies. However, wearables that track heart rate now provide the opportunity to continuously monitor heart rate over time, and identify normal resting heart rates at the individual level.
In the largest study of its kind to date, Quer and colleagues retrospectively analyzed de-identified heart rate data from wearables worn for a median of 320 days by 92,457 people from across the U.S. Nearly 33 million days' worth of heart rate data were collected in total. The researchers used the data to examine variations in resting heart rate for individuals over time, as well as between individuals with different characteristics.
The analysis showed that one person's mean daily resting heart rate may differ by up to 70 beats per minute from another person's normal rate. Taken together, age, sex, body mass index (BMI), and average daily sleep duration accounted for less than 10 percent of the observed variation between individuals.
Journal Reference:
Giorgio Quer, Pishoy Gouda, Michael Galarnyk, Eric J. Topol, Steven R. Steinhubl. Inter- and intraindividual variability in daily resting heart rate and its associations with age, sex, sleep, BMI, and time of year: Retrospective, longitudinal cohort study of 92,457 adults. PLOS ONE, 2020; 15 (2): e0227709 DOI: 10.1371/journal.pone.0227709
(Score: 0) by Anonymous Coward on Monday February 17 2020, @12:22PM (2 children)
A family member's resting heart rate is around 44, so whenever he goes to any kind of medical visit the staff measure his pulse and then start asking a battery of questions about heart attack symptoms. But since it's been at that level for decades, we're pretty sure he's fine.
(Score: 1, Interesting) by Anonymous Coward on Monday February 17 2020, @10:57PM
One of my friends is a competitive cyclist. When he had to go in for a surgery recently, they had to put a placard (reading "Athlete") on his monitors, because his ultra-low heart rate was constantly setting off alarms.
(Score: 0) by Anonymous Coward on Saturday February 22 2020, @02:18PM
My resting rate is ~ 40, but dips if I'm sick
When the Dr. saw it at 39, I was hooked up to an EKG and sent to a cardiologist to evaluate for a pacemaker.
At the cardiologist, they registered 36.
when I the antibiotics finally kicked in and I wasn't sick, I went back to 40. And I don't need a pacemaker, but we now keep an eye on my heart.