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Periods of Biological Rhythms - Circadian Cycle.

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Periods of Biological Rhythms Circadian Cycle The circadian cycle is a rhythm with a 24-hour cycle. It is Latin with circa meaning "about," and di meaning "day" to create "about a day." Heart rate, body temperature and productivity change in accordance to the time of day. During the day, people will experience different levels of alertness, due to body temperature. Chronobiologists have found that body temperature and alertness rhythms go hand in hand. There is no single time of peak performance on mental tasks, but rather different peak times for different tasks. ...read more.


9A.M. During the morning hours, it is the prime time for organizing, planning, creative thinking, writing, and editing. 11 A.M. This is the best time to schedule a meeting. The majority of people rate themselves as most alert at this hour, with their reasoning skills at their daily high. As well, short-term memory, the need to retain facts and have them readily available, is at a peak. Noon Complex decision-making skills are at their peak 1-2 P.M. This is the best time for lunch because cheerfulness is at a high. ...read more.


During this time, people are more coordinated, and their reaction time is swift. This is a good time for exercise. 8-10 P.M. Alertness remains at a high. Midnight Going to bed at about the same time each night sets the biological clock to expect good sleep. It reduces night-to-night variability, which helps reduce feelings of anxiety about sleep and perhaps insomnia. The sleep / wake cycle is the most obvious circadian rhythm. The circadian click controls when people go to sleep, how long they sleep for, and the course of sleep during the night. Sleep is necessary for restoring energy lost throughout the day. (Lamberg 1994, 42-47) ...read more.

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