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  2. 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.

  3. Neuroscience of sleep - Wikipedia

    en.wikipedia.org/wiki/Neuroscience_of_sleep

    Similarly, TSH increases during nocturnal sleep and decreases with prolonged periods of reduced sleep, but increases during total acute sleep deprivation. [ 136 ] [ 137 ] Because hormones play a major role in energy balance and metabolism, and sleep plays a critical role in the timing and amplitude of their secretion, sleep has a sizable effect ...

  4. Heart rate - Wikipedia

    en.wikipedia.org/wiki/Heart_rate

    For healthy people, the Target Heart Rate (THR) or Training Heart Rate Range (THRR) is a desired range of heart rate reached during aerobic exercise which enables one's heart and lungs to receive the most benefit from a workout. This theoretical range varies based mostly on age; however, a person's physical condition, sex, and previous training ...

  5. Getting less slow-wave sleep as you age may increase your ...

    www.aol.com/getting-less-slow-wave-sleep...

    The researchers studied 346 people who were age 69 on average and had participated in the Framingham Heart Study and completed two overnight sleep studies — one between 1995 to 1998 and the ...

  6. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    The brain concentration of glycogen increases during sleep, and is depleted through metabolism during wakefulness. [97] The human organism physically restores itself during sleep, occurring mostly during slow-wave sleep during which body temperature, heart rate, and brain

  7. 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 ...

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

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

    Keep in mind that depending on your age, your goal heart rate will differ. ... note that hormonal changes can impact your heart rate—and depending on when you measure during your hormonal cycle ...

  9. K-complex - Wikipedia

    en.wikipedia.org/wiki/K-complex

    They are present in the sleep of 5-month-old infants, and develop with age. Between 3 and 5 years of age a faster negative component appears and continues to increase until adolescence. Another change occurs in adults: before 30 years of age their frequency and amplitude are higher than in older people particularly those over 50 years of age. [10]