Circadian rhythm and sleep disturbances

The lives of most living creatures, including humans, are regulated by the predictable rhythm of night and day which is known as Circadian Rhythm. Circadian rhythm influences our body’s physiological functions such as core body temperature, hormonal secretions, heart rate, renal output, and gut motility. When the circadian rhythms are out of harmony with the day-night cycle, people can not only experience sleep disturbances but also other health problems.

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Adam Shakespeare