Collet Gregory, Mairesse Olivier, Cortoos Aisha, Tellez Helio Fernandez, Neyt Xavier, Peigneux Philippe, Macdonald-Nethercott Eoin, Ducrot Yves-Marie, Pattyn Nathalie
Aerosp Med Hum Perform. 2015 Apr;86(4):392-6. doi: 10.3357/AMHP.4159.2015.
This study investigates the effects of seasonality and altitude on sleep in extreme Antarctic conditions.
During summer and winter periods, 24 h of actimetric recordings were obtained at two different research stations, Dumont d'Urville (sea level altitude) and Concordia (corrected altitude 12,467 ft or 3800 m).
During daytime, there were no altitude- or season-related differences in time spent at work, energy expenditure, or number of walking steps. During the nighttime however, total sleep time was longer (m = 427.4; SD = 42.4), sleep efficiency higher (m = 90; SD = 4.8), and wake after sleep onset shorter (m = 42.2; SD = 28.7) at sea level. Additionally, sleep fragmentation episodes and energy expenditure were higher during summer than winter periods.
Our results show that dramatic variations in light exposure are not the only main factor affecting sleep quality in Antarctica, as altitude also markedly impacted sleep in these conditions. The effect of altitude-induced hypoxia should be taken into account in future investigations of sleep in extreme environments.
本研究调查了季节性和海拔高度对南极极端条件下睡眠的影响。
在夏季和冬季期间，在两个不同的研究站——迪蒙·迪维尔站（海平面海拔）和康科迪亚站（校正海拔12,467英尺或3800米）——进行了24小时的活动记录。
在白天，工作时间、能量消耗或步行步数在海拔或季节方面没有差异。然而，在夜间，海平面处的总睡眠时间更长（均值 = 427.4；标准差 = 42.4），睡眠效率更高（均值 = 90；标准差 = 4.8），睡眠开始后的觉醒时间更短（均值 = 42.2；标准差 = 28.7）。此外，夏季的睡眠片段化发作和能量消耗高于冬季。
我们的结果表明，光照的巨大变化不是影响南极睡眠质量的唯一主要因素，因为海拔高度在这些条件下也显著影响睡眠。在未来对极端环境中睡眠的研究中，应考虑海拔引起的缺氧效应。
