Post-awakening cortisol secretion during basic military training
Post-awakening cortisol secretion during basic military training
复制标题
DOI：
10.1016/j.ijpsycho.2005.05.007
复制
发表时间：
2006-04-01
影响因子：
3
通讯作者：
Casey, A
中科院分区：
文献类型：
--
作者：
Clow, A;Edwards, S;Casey, A
本文对12名健康新兵在开始、中间和结束为期11周的强化体能训练课程时，觉醒后30分钟内唾液游离皮质醇浓度进行了评估。为了确保严格遵守方案，监督唾液收集，并在每个采样日醒来后立即收集，并在15分钟和30分钟后再次收集。在每个采样日的晚上进行压力、觉醒和疲劳状态水平的自我评定心理评估。对完成课程的参与者（最初的20人中的12人）进行的受试者内重复测量分析显示，在觉醒后的所有三个采样点，皮质醇浓度的主效应显著（F-（2.22）=54.516，p < 0.0001），并且在进入培训课程的几周内有显著的主效应（F-（3.33）=4.390，p=0.010）。对测量周的这种影响的进一步分析显示，与疗程开始和结束时相比，在第3周和第6周，通过曲线下面积估计的总皮质醇分泌较低（F-（3.33）=4.602，p=0.008）。令人惊讶的是，自我报告的压力，唤醒和疲劳在几周内没有显着差异，尽管辍学率很高（40%）和不言而喻的压力。我们的结论是，当控制许多混杂变量，包括参与者的依从性，觉醒后皮质醇水平是敏感的压力挑战在一段时间内的几个星期，（c）2005爱思唯尔B. V.保留所有权利。
Salivary free cortisol concentrations in the first 30 min after awakening were assessed in 12 healthy army recruits at the beginning, middle and end of an 11-week intensive physical training course. To ensure strict adherence to protocol saliva collection was supervised and collected on each sampling day immediately on waking and again 15 and 30 min later. Self-rated psychological assessments of state levels of stress, arousal and fatigue were performed in the evening of each sampling day. A within-subjects repeated-measures analysis of participants who completed the course (12 of the original 20) showed a significant main effect of cortisol concentration across all three sampling points after awakening (F-(2.22)=54.516, p < 0.0001) and a significant main effect of weeks into the training course (F-(3.33)=4.390, p=0.010). Further analysis of this effect of measurement-week revealed that at weeks 3 and 6 total cortisol secretion estimated by area under the curve was lower (F-(3.33)=4.602, p=0.008) compared to the beginning and end of the course. Surprisingly self-reported stress, arousal and fatigue did not differ significantly across weeks, despite the large dropout rate (40%) and self-evident pressures of the course. We conclude that when controlling for many confounding variables, including participant adherence, post-awakening cortisol levels are sensitive to stressful challenge over a period of weeks, (c) 2005 Elsevier B.V. All rights reserved.