Schwerdtfeger Andreas R, Schienle Anne, Leutgeb Verena, Rathner Eva-Maria
Department of Psychology, University of Graz, Graz, Austria.
Psychophysiology. 2014 Jun;51(6):565-72. doi: 10.1111/psyp.12199. Epub 2014 Apr 2.
Cardiovascular reactivity to laboratory stress might predict cardiovascular load in everyday life. However, previous research throws doubt on this hypothesis. This study examined associations between heart rate (HR) to a public speaking task and ambulatory HR throughout a day. Electrocardiogram, bodily movement, and psychosocial variables (affect, context) were recorded in 111 individuals. Ambulatory HR was positively associated with both positive and negative affect. Baseline HR in the laboratory significantly predicted ambulatory HR, but HR reactivity did not. The interaction of momentary negative affect and cardiac reactivity in the laboratory was also not significant. However, a significant interaction of baseline HR and reactivity indicated that, when baseline was high, there was a positive relation between HR reactivity and ambulatory HR. Findings suggest that baseline has to be considered when aiming to predict cardiovascular load in everyday life.
对实验室压力的心血管反应性可能预示着日常生活中的心血管负荷。然而，先前的研究对这一假设提出了质疑。本研究调查了在公众演讲任务中的心率（HR）与全天动态心率之间的关联。记录了111名个体的心电图、身体活动和心理社会变量（情绪、情境）。动态心率与积极和消极情绪均呈正相关。实验室中的基线心率显著预测了动态心率，但心率反应性则不然。实验室中瞬间消极情绪与心脏反应性的交互作用也不显著。然而，基线心率与反应性之间的显著交互作用表明，当基线较高时，心率反应性与动态心率之间存在正相关关系。研究结果表明，在旨在预测日常生活中的心血管负荷时，必须考虑基线因素。
