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  2. Heart rate - Wikipedia

    en.wikipedia.org/wiki/Heart_rate

    The American Heart Association states the normal resting adult human heart rate is 60–100 bpm. An ultra-trained athlete would have a resting heart rate of 37–38 bpm. [3] Tachycardia is a high heart rate, defined as above 100 bpm at rest. [4] Bradycardia is a low heart rate, defined as below 60 bpm at rest.

  3. Heart rate variability - Wikipedia

    en.wikipedia.org/wiki/Heart_rate_variability

    Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval. Other terms used include "cycle length variability", "R–R variability" (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and R–R is ...

  4. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiac_physiology

    The resting heart rate of a newborn can be 120 beats per minute (bpm) and this gradually decreases until maturity and then gradually increases again with age. The adult resting heart rate ranges from 60 to 100 bpm. Exercise and fitness levels, age and basal metabolic rate can all affect the heart rate. An athlete's heart rate can be lower than ...

  5. Normal Heart Rate for Elderly: What You Need to Know - AOL

    www.aol.com/normal-heart-rate-elderly-know...

    In all adults, including seniors, a normal resting heart rate can be anywhere between 60 and 100 beats per minute. But note: the lower the number within this range, the better.

  6. Respiratory rate - Wikipedia

    en.wikipedia.org/wiki/Respiratory_rate

    For humans, the typical respiratory rate for a healthy adult at rest is 12–15 breaths per minute. [10] The respiratory center sets the quiet respiratory rhythm at around two seconds for an inhalation and three seconds exhalation. This gives the lower of the average rate at 12 breaths per minute. Average resting respiratory rates by age are ...

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

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

    However, it is not normal for someone to have a low resting heart rate without significant physical training, he notes. A low resting heart rate in the 50s is generally associated with better ...

  8. Sleep cycle - Wikipedia

    en.wikipedia.org/wiki/Sleep_cycle

    The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [1]

  9. Tachycardia - Wikipedia

    en.wikipedia.org/wiki/Tachycardia

    Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. [1] In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. [1] Heart rates above the resting rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart).

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