Changes in sleep quality of athletes under normobaric hypoxia equivalent to 2,000-m altitude: A polysomnographic study

Masako Hoshikawa*, Sunao Uchida, Takayuki Sugo, Yasuko Kumai, Yoshiteru Hanai, Takashi Kawahara

*この研究の対応する著者

    研究成果: Article査読

    34 被引用数 (Scopus)

    抄録

    This study evaluated the sleep quality of athletes in normobaric hypoxia at a simulated altitude of 2,000 m. Eight male athletes slept in normoxic condition (NC) and hypoxic conditions equivalent to those at 2,000-m altitude (HC). Polysomnographic recordings of sleep included the electroencephalogram (EEG), electrooculogram, chin surface electromyogram, and electrocardiogram. Thoracic and abdominal motion, nasal and oral airflow, and arterial blood oxygen saturation (SaO2) were also recorded. Standard visual sleep stage scoring and fast Fourier transformation analyses of the EEG were performed on 30-s epochs. Subjective sleepiness and urinary catecholamines were also monitored. Mean SaO2 decreased and respiratory disturbances increased with HC. The increase in respiratory disturbances was significant, but the increase was small and subclinical. The duration of slow-wave sleep (stage 3 and 4) and total delta power (<3 Hz) of the all-night non-rapid eye movement sleep EEG decreased for HC compared with NC. Subjective sleepiness and amounts of urinary catecholamines did not differ between the conditions. These results indicate that acute exposure to normobaric hypoxia equivalent to that at 2,000-m altitude decreased slow-wave sleep in athletes, but it did not change subjective sleepiness or amounts of urinary catecholamines.

    本文言語English
    ページ(範囲)2005-2011
    ページ数7
    ジャーナルJournal of Applied Physiology
    103
    6
    DOI
    出版ステータスPublished - 2007 12月

    ASJC Scopus subject areas

    • 生理学
    • 内分泌学
    • 整形外科およびスポーツ医学
    • 理学療法、スポーツ療法とリハビリテーション

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