Restorative Theory Of Sleep

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Sleep play an important role in human life. Among the reasons why sleep is necessary for human being are due to biological and psychological needs. According to Ciccarelli and White (2014), sleep is one of the human body’s biological rhythms which is natural cycle of the activity that the body must go through which occurs over a 24-hour period. From psychological point of view, there are two theories of sleep which are adaptive theory of sleep and the restorative theory of sleep. Adaptive theory suggesting that sleep pattern of animal and human is changed in order to avoid predators whereas restorative theory propose that sleep is necessary to the physical health of the body and serve replenish chemicals as well as repair cellular damage. Therefore, both adaptive and restorative theories do emphasise the importance of sleep towards human’s survival and well-being.
From Islamic point of view, sleep is one of signs of power of Allah. As mentioned in the Holy Quran “Among His signs is your sleep by night and by day, and your seeking of His bounty. Verily, in that are indeed signs for a people who listen.” (30:32). Sleep also important for rest and this is in line with verse in the Quran, “And We have made sleep as the thing for rest.” (78:9). Numerous numbers of studies verified that there are a lot of concepts of sleep that have been discussed from Islamic perspective in the past. As mentioned by Alias (2008), al-Khindi specified that there are several functions

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