Harris Anette, Marquis Peter, Eriksen Hege R, Grant Iain, Corbett Richard, Lie S A, Ursin H
Research Center for Health Promotion, University of Bergen/Unifob Health, Bergen, Norway.
Rural Remote Health. 2010 Apr-Jun;10(2):1351. Epub 2010 Jun 18.
The diurnal rhythm of saliva cortisol and its association to adaptation, performance and health were examined in personnel over-wintering at two British Antarctic stations.
In total, 55 healthy individuals (49 males, 6 females) participated in the study. Cortisol in saliva was sampled on 3 consecutive days (at awakening, 15 and 45 min after waking, at 15.00 h, and 22.00 h) immediately after arrival at the station, midwinter, and the last week before departure. Subjective health complaints were also measured at arrival, midwinter, and the last week before departure, while depression (Burnam screen for depression) and positive and negative affect (PANAS) were measured at midwinter only. At the end of the winter appointment, base commanders evaluated the performance of all personnel.
The variations in external light (darkness during winter, midnight sun during arrival and departure) did not influence the diurnal rhythms. The normal peak level in the morning, and the normal and gradual fall towards the evening were observed at arrival, midwinter, and before departure. Immediately after arrival the cortisol values were relatively high and correlated positively with base commander's evaluation of performance. During midwinter, approximately 58% scored for depression on the Burnam scale. However, when examining these data more closely, only 4 participants (7%) reported depression, the main reason for the high score on the depression scale was related to sleep problems and tiredness.
There was no indication that over-wintering led to any disturbance in the diurnal rhythm of cortisol in British Antarctic personnel. There were no other indications of any 'over-wintering syndrome' than reports of subjective sleep problems and tiredness.
对在英国两个南极考察站越冬的人员，研究了唾液皮质醇的昼夜节律及其与适应、工作表现和健康的关系。
共有55名健康个体（49名男性，6名女性）参与了该研究。在抵达考察站时、冬至时以及出发前最后一周，连续3天（醒来时、醒来后15分钟和45分钟、15:00以及22:00）采集唾液中的皮质醇样本。在抵达时、冬至时以及出发前最后一周还测量了主观健康投诉情况，而仅在冬至时测量了抑郁（伯纳姆抑郁筛查量表）以及积极和消极情绪（PANAS）。在冬季任务结束时，基地指挥官对所有人员的工作表现进行了评估。
外部光照的变化（冬季为黑暗，抵达和出发时为极昼）并未影响昼夜节律。在抵达时、冬至时以及出发前，观察到早晨有正常的峰值水平，且正常且逐渐下降至傍晚。抵达后即刻，皮质醇值相对较高，且与基地指挥官对工作表现的评估呈正相关。在冬至期间，约58%的人在伯纳姆量表上抑郁得分。然而，更仔细检查这些数据时，只有4名参与者（7%）报告有抑郁，抑郁量表高分的主要原因与睡眠问题和疲劳有关。
没有迹象表明越冬会导致英国南极人员皮质醇昼夜节律出现任何紊乱。除了主观睡眠问题和疲劳的报告外，没有其他迹象表明存在任何“越冬综合征”。
