The effects of exercise intensity on the cortisol response to a subsequent acute psychosocial stressor
The effects of exercise intensity on the cortisol response to a subsequent acute psychosocial stressor
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DOI：
10.1016/j.psyneuen.2021.105336
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发表时间：
2021-06-25
影响因子：
3.7
通讯作者：
Puterman, E.
中科院分区：
文献类型：
--
作者：
Caplin, A.;Chen, F. S.;Puterman, E.
目的：本实验研究的目的是确定在何种程度上的强度，一个单一的30分钟回合的运动改变唾液皮质醇（sCort）的反应，随后引起的急性心理社会应激。该研究进一步旨在阐明运动强度发挥缓解压力作用的生理机制。研究方法：83名健康男性（法师= 21.04 SD = 2.89）被随机分配到30%、50%和70%的心率储备（HRR）的跑步机上运动30 min，然后在45 min后进行Trier社会应激测试。在整个运动回合和应激任务期间和之后重复测量sCort。结果如下：ANCOVA和多水平生长曲线分析确定，与强度较低的运动相比，剧烈（70%HRR）运动引起对应激源任务的sCort反应减弱，其特征是总sCort水平较低，sCort反应性减弱，恢复至基线值的速度更快。此外，运动引起的sCort反应的强度成比例，它是执行，这种运动相关的HPA轴的反应是成反比的sCort响应随后的应激任务。结论：这项研究表明，运动强度以剂量依赖的方式抑制HPA轴的应激反应，有证据表明，运动释放的皮质醇强烈抑制了随后的皮质醇对心理社会应激源的反应。
Objective: The aim of this experimental study was to determine the extent to which the intensity of a single 30 min bout of exercise alters the salivary cortisol (sCort) response to a subsequently induced acute psychosocial stressor. The study further aimed to elucidate a physiological mechanism through which exercise intensity exerts stress-mitigating effects. Methods: Eighty-three healthy men (Mage = 21.04 SD = 2.89) were randomly assigned to exercise on a treadmill at either 30%, 50% or 70% of their heart rate reserve (HRR) for 30 min and then underwent the Trier Social Stress Test 45 min later. sCort was measured repeatedly throughout and following the exercise bout and stressor task. Results: ANCOVA and Multilevel Growth Curve Analysis determined that vigorous (70% HRR) exercise elicited dampened sCort responses to the stressor task, marked by lower total sCort levels, diminished sCort reactivity, and faster recovery to baseline values, as compared to less intense exercise. Moreover, exercise elicited a sCort response in proportion to the intensity at which it was performed, and this exercise-associated HPA-axis response was inversely proportional to the sCort response to the subsequent stressor task. Conclusions: This study revealed that exercise-intensity dampens the HPA-axis stress response in a dosedependent manner, with evidence that the cortisol released from exercising intensely suppresses the subsequent cortisol response to a psychosocial stressor.