送女生丝巾的含义:健康午睡十分钟不喝咖啡也精力足

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健康午睡十分钟不喝咖啡也精力足

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  休息,是为了走更远的路!”上了半天班,许多上班族都会在中午午睡一下,下午上班才有精神!然而,正确的午睡姿势、时间,也决定了午睡品质的好坏,国外已有研究证实,午睡时间长度以10分钟效果最好,一旦睡超过30分钟,精神反而会更差、更累;而中午有机会小睡一下,绝对比喝咖啡提神有效!

  人类之所以容易在午后打瞌睡,有一种说法是,可以维持4~5小时活跃状态的脑细胞,在经过一整个上午的工作和能量消耗后,转入抑制状态,特别是在中午午餐过后,血液集中于消化道,使大脑的血液和氧气供应相对减少,便容易使人昏昏欲睡;也有一种说法是,人体原本即倾向两段式睡眠,一次在晚上,另一次发生在下午,因此,不管晚上睡眠是否足够,一天之中会想小睡片刻,是人类正常的生物需要。

  特别的是,午睡还具有季节性差异,夏天会比冬天容易感到想睡,主因是夏天气温较高、暑气逼人,皮肤血管容易扩张,血液大量集中于皮肤,引起体内血液分配不平衡,脑部血液供应相对不足,而使人提不起精神。加上夏天天热夜间比较晚入睡、早上则醒得早,睡眠时间变短,睡眠品质不佳的情况下,便需要藉由午睡来补充睡眠。

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