Effects of 3-hour nap in the early morning on performance and sleepiness during prolonged continuous work

DOI
  • HAYASHI Mitsuo
    Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University
  • HORI Tadao
    Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University

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Other Title
  • 早朝3時間の仮眠が連続作業中の作業成績と眠気に及ぼす効果

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The effects of 3-h nap in the early morning on performance and sleepiness during prolonged continuous works were studied. After one night sleep recording, subjects performed prolonged works for 20 hours. Following the 20 hours of works, four subjects took a 3-h nap lying in a bed (0400-0700), and the other four subjects took a 3-h rest sitting in a reclining chair. After taking a 3-h nap or rest, they performed the same works again for 12 hours. In working period, three different computer tasks were administered every 15 min. Results revealed that the early morning nap had a positive effect upon the improvement of performance and sleepiness, lasting 2 to 3 hours following the nap, and it delayed the decline in performance and the increase of sleepiness for several hours.

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