A short nap as a countermeasure against afternoon sleepiness

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  • HAYASHI Mitsuo
    Department of Behavioral Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University
  • HORI Tadao
    Department of Behavioral Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

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  • 午後の眠気対策としての短時間仮眠
  • ゴゴ ノ ネムケ タイサク ト シテノ タンジカン カミン

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Abstract

Sleepiness is a common phenomenon in the mid-afternoon, and it causes the so-called 'post-lunch dip' in performance. Recent investigations have demonstrated that a short nap of less than 30 minutes is effective in maintaining daytime arousal. This type of nap has no slow wave sleep and therefore, it is associated with little sleep inertia immediately after awakening. It is pointed out that caffeine, bright lights, music, washing the face, and self-awakening reduces sleep inertia and further enhances the effects of a short nap. (Japanese Journal of Physiological Psychology and Psychophysiology, 25 (1) : 45-59, 2007.)

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