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A circadian rhythm (/ sərˈkeɪdiən /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment). Circadian rhythms are regulated by a circadian clock whose ...
A diurnal cycle (or diel cycle) is any pattern that recurs every 24 hours as a result of one full rotation of the planet Earth around its axis. [ 1 ] Earth's rotation causes surface temperature fluctuations throughout the day and night, as well as weather changes throughout the year. The diurnal cycle depends mainly on incoming solar radiation.
Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic, bifurcated, or bimodal) sleep refers to two periods, while polyphasic usually means more than two. [ 1 ]Segmented sleep and divided sleep may ...
Sports periodization. Periodization is a cyclical method of planning and managing athletic or physical training and involves progressive cycling of various aspects of a training program during a specific period. [ 1 ][ 2 ] Conditioning programs can use periodization to break up the training program into the off-season, preseason, inseason, and ...
Humans are diurnal, and organize their work and business mainly in the day [ a ] Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is " diurnal ". The timing of activity by an animal depends on a ...
A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours (86,400 seconds). As a day passes at a given location it experiences morning, noon, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.
Overall, men are two to three times more likely to suffer from apnea than women. About 4% of women have a related condition known as upper airway resistance, that can also disrupt breathing and ...
The SCN is then able to influence the sleep wake cycle, acting as the "apex of a hierarchy" that governs physiological timing functions. [2] "Rest and sleep are the best example of self-organized operations within neuronal circuits". [1] A-riot-of-rhythms-neuronal-and-glial-circadian-oscillators-in-the-mediobasal-hypothalamus-1756-6606-2-28-S3
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