• Elke Vlemincx, Michel Meulders, and James L Abelson.
• Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium; Research Group on Health Psychology, KU Leuven, Leuven, Belgium. Electronic address: Elke.Vlemincx@kuleuven.be.
• Biol Psychol. 2017 Apr 1; 125: 163-172.

AbstractEvidence suggests that sighs regulate stress and emotions, e.g. by facilitating relief. This study aimed to investigate sigh rates during relief. In addition, links between sighs, anxiety sensitivity and HPA-axis activity were explored. Healthy volunteers (N=29) were presented cues predicting the valence of subsequent stimuli. By sequencing cues that predicted pleasant or unpleasant stimuli with or without certainty, transitions to certain pleasantness (relief) or to certain unpleasantness (control) were created and compared to no transitions. Salivary cortisol, anxiety sensitivity and respiration were measured. Sigh frequency was significantly higher during relief than during control transitions and no transition states, and higher during control transitions than during no transition states. Sigh frequency increased with steeper cortisol declines for high anxiety sensitive persons. Results confirm a relationship between sighs and relief. In addition, results suggest that sigh frequency is importantly related to HPA-axis activity, particularly in high anxiety sensitive persons.Copyright © 2017 Elsevier B.V. All rights reserved.

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