Why struggle to get up in morning?

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W??ish??nme z??och??n b??xi??ng q??chu??ng?

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Most of us love a good lie-in on the weekends. But for some people, getting out of bed each morning is a daily struggle that can disrupt their lives. Now, researchers believe they have found out why some people struggle to sleep at night and reach for the snooze button in the morning - their body clocks are set too slow.

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A team from Flinders University in Adelaide, Australia is investigating delayed sleep phase disorder, which is characterized by a persistent inability to fall asleep and wake at a conventional time. Study leader, Professor Leon Lack, said initial results showed that the internal body clocks, of those with the disorder ran slower than average. Late sleepers can't get to sleep until 2am or 3am at the earliest, or in some cases as late as 4am, which makes it very hard for them to get up for their commitments the next day.

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"We've been investigating what causes people to be late sleepers and one of the most plausible explanations we're perusing is that their body clocks run longer than 24 hours."

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Circadian rhythms are followed by most living things and follow a daily cycle that are governed by our internal body clocks. They influence sleep and wake cycles, body temperature and the release of hormones. They can be affected by environmental factors, such as light levels, and so disrupted by flying across time zones and working night shifts.

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Most people have a 24-hour body clock, it's a natural rhythm that influences sleepiness and core body temperature but for people with delayed sleep phase disorder it takes longer to complete the cycle so they tend to go to bed later and wake up later.

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"If we establish what we're expecting to find it will reinforce therapies that we know can help, such as bright light therapy to induce alertness in the mornings and melatonin to encourage earlier evening sleepiness," he said.

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 Korean enticing women.?????? ??sh??ngw?? zh??ng?? Body clock

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(Source: myechinese.com)

 lascivity ingenues.