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2. Your resting heart rate can tell you a lot about your health ...

   www.aol.com/finance/resting-heart-rate-tell-lot...

   Those are times to seek out help because it may not be a reflection of your resting heart rate, but an abnormal heart rhythm that should get evaluated.” Having a pulse over 100 bpm is called ...

3. Heart rate variability - Wikipedia

   en.wikipedia.org/wiki/Heart_rate_variability

   Heart rate variability visualized with R-R interval changes Electrocardiogram (ECG) recording of a canine heart that illustrates beat-to-beat variability in R–R interval (top) and heart rate (bottom). Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the ...

4. Heart rate - Wikipedia

   en.wikipedia.org/wiki/Heart_rate

   Heart rate (HR) (top trace) and tidal volume (Vt) (lung volume, second trace) plotted on the same chart, showing how heart rate increases with inspiration and decreases with expiration. Heart rate is not a stable value and it increases or decreases in response to the body's need in a way to maintain an equilibrium ( basal metabolic rate ...

5. Sleep cycle - Wikipedia

   en.wikipedia.org/wiki/Sleep_cycle

   Heart rate variability, well known to increase during REM, predictably also correlates inversely with delta-wave oscillations over the ~90-minute cycle. [4] In order to determine in which stage of sleep the asleep subject is, electroencephalography is combined with other devices used for this differentiation.

6. Here Are Cardiologist-Approved Ways to Lower Your Resting ...

   www.aol.com/lifestyle/cardiologist-approved-ways...

   [table-of-contents] stripped. Whether brought on by stress, physical activity, or an extra cup of joe in the morning, most of us have all felt our heart rate quicken at one time or another.However ...

7. The No. 1 Best Side to Sleep on For Heart Health ... - AOL

   www.aol.com/no-1-best-side-sleep-232500371.html

   A March 2020 study published in Circulation suggested that the American Heart Association add "sleep" to Life's Simple 7 measures for good cardiovascular health, along with other measures like ...

8. Sleep - Wikipedia

   en.wikipedia.org/wiki/Sleep

   The human organism physically restores itself during sleep, occurring mostly during slow-wave sleep during which body temperature, heart rate, and brain oxygen consumption decrease. In both the brain and body, the reduced rate of metabolism enables countervailing restorative processes. [ 93 ]

9. Irregular Sleep-Wake Cycles May Raise Heart Attack, Stroke ...

   www.aol.com/lifestyle/irregular-sleep-wake...

   Sleep regularity (waking up and going to bed at the same time every day) could be more important than sleep duration in predicting heart attack and stroke. A new study found that even when ...