早睡早起,未必是个好习惯?

2015-11-13 王剑 中国科学报

中国有句谚语叫作“早睡早起身体好”。然而,有一位学者并不这么认为。这位学者是牛津大学的Paul Kelley。他去年的一项研究表明,10岁的孩子自然睡醒的时间是6点半,16岁时是8点,18岁时则是9点……中国有句谚语叫作“早睡早起身体好”。然而,有一位学者并不这么认为。这位学者是牛津大学的Paul Kelley。他去年的一项研究表明,10岁的孩子自然睡醒的时间是6点半,16岁时是8点,18岁时则是

中国有句谚语叫作“早睡早起身体好”。然而,有一位学者并不这么认为。

这位学者是牛津大学的Paul Kelley。他去年的一项研究表明,10岁的孩子自然睡醒的时间是6点半,16岁时是8点,18岁时则是9点……

然而,睡到这个时间,肯定会被认为是懒虫了。那么,早睡早起这个延续多年的好习
惯难道错了吗?

良好睡眠关乎健康

拥有一个良好的睡眠习惯和生活习惯,对于儿童或青少年的健康、学习和成长都是至关重要的。多年从事医学循证、研究设计和疾病控制研究的美国弗吉尼亚联邦大学教授宁毅在接受《中国科学报》记者采访时表示:“好习惯或者坏习惯可以延续到成人,进而影响成人的事业发展、健康状况和整体疾病发生的风险。”

宁毅坦言,Paul Kelley的观点侧重研究了学生上学的时间和学习的关系。但是总体来说,任何疾病的发生,或者任何一个结果的显现,比如,学习成绩、某种成长指标的发生,都是多因素的——即许多复杂因素的结果。

睡眠本身是一个非常复杂的生理现象,从生理上,它涉及到大脑不同区域之间的活动、神经递质的传播和激素的分泌,进而影响到各个器官,包括肝脏等的一些正常功能的行使以及分泌代谢等等。

同时,生活方式,比如说,晚睡的时间,是不是也会影响到睡眠的质量以及睡眠的长度;另外,睡眠之前心理的兴奋状态也影响到睡眠的质量和睡眠的长度。

睡眠质量更为重要

在Paul Kelley的研究中指出,“对于这些孩子们,7点叫醒他们,相当于在早晨4点半把50多岁的人叫醒”。

他的研究还发现,10岁儿童在上午8点半之后才能专注地学习,16岁的青少年在10点之后开始学习才能有最好的效果,而大学生则应该从上午11点之后开始学习。

在Paul Kelley看来,仅仅通过推迟上学时间就能将学生的成绩提高10%。他说,根据预先设定的生物钟,青少年应该在午夜左右睡觉,并且要到上午10点左右才能完全清醒、注意力集中。

而宁毅指出,Paul Kelley的研究仅强调了起床时间过早,或者上学时间过早与学习成绩、身体健康的关系这样一个问题。宁毅认为,实际上,在这个问题的背后我们还应该看到,“儿童和青少年是否入睡太晚,以至于推迟起床时间”,以及他们是否有足够的睡眠时间,这仅仅是从睡眠时间的长度上来讲;但是,不应忽略“他们的睡眠质量是不是足够高”。

研究尚在假设阶段

“整体来说,Paul Kelley的这项研究质量不是很高,但它确实又是在研究人们关心的一个重要的问题——孩子的起床时间与学习成绩以及成长是不是真的有关系。”宁毅坦言,“可以说,这项研究在目前还是科研人员的一个假说阶段,也就是怀疑起床时间是否和孩子的健康和学习有关系。”

具体到这项研究,是不是我们的一些公共卫生政策、学生政策或家庭安排要有所改变?“我想,就目前来说,针对这一研究的证据仍比较薄弱,从家庭,或者从公共卫生政策来说,我们更应该强调保证儿童和青少年要有足够的睡眠时间,比如强调孩子从小要生活规律、要早入睡,来保证他足够的睡眠时间。”

宁毅补充道:“对于青少年来说,即使给他规定了起床的时间,例如不论是9点或者10点,但是很多孩子还是有一定的情绪——他总还要再延迟一段时间。这从某种角度来说,有一个目标的、规律的起床时间还是必要的。”

最后,宁毅强调,关注儿童和青少年的成长,就要关注学生是否有足够的睡眠时间,其次是关于孩子几点起床比较有利于孩子成长,还需要更多的研究加以证实。

《中国科学报》 (2015-11-06 第4版 真相)

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    2015-11-16 fuwen

    惊讶

    0

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    2015-11-14 liuqin20051224

    只要生物钟规律就好!

    0

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    2015-11-14 ling418

    好吧

    0

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    2015-11-14 sanshengshi

    0

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    2015-11-14 田田1746

    惊讶

    0

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    2015-11-13 IIIi

    0

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    2015-11-13 1ddead39m90(暂无匿称)

    还是专家说的好:保证充足睡眠时间

    0

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