Biological factors and self-perception of stress in relation to freeze-like response in humans

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Authors

VÍT Michal KUČERA Jan LENÁRT Peter NOVÁK Jan ZLÁMAL Filip REGULI Zdenko BUGALA Martin REGULI ČIHOUNKOVÁ Jitka PŘECECHTĚL Pavel MALČÍK Vojtěch VOJTÍŠEK Tomáš FIALOVÁ KUČEROVÁ Jana ECLEROVÁ Veronika TOMANDLOVÁ Marie ŠÍP Radek RÁČKOVÁ Lucie GRULICHOVÁ Markéta TOMANDL Josef DOBROVOLNÁ Julie

Year of publication 2023
Type Article in Periodical
Magazine / Source Psychoneuroendocrinology
MU Faculty or unit

Faculty of Sports Studies

Citation
Web https://www.sciencedirect.com/science/article/pii/S0306453023003608?via%3Dihub
Doi http://dx.doi.org/10.1016/j.psyneuen.2023.106382
Keywords Stress; Freeze-like response; Simulated attack; Osteocalcin; Cortisol
Attached files
Description Many animals react to threatening stimuli such as a predator attacks by freezing. However, little experimental research investigated freeze response in humans. Here, we have employed practices commonly used in selfdefense training to create two unique scenarios simulating armed physical threat. Sixty healthy men volunteers divided into three groups of twenty (untrained, trained but unexperienced, trained and experienced) underwent these scenarios accompanied by measurement of biochemical, physiological, and psychological markers of stress. Our results show that untrained individuals exhibit stronger freezing reactions, while highly skilled participants display the lowest propensity for freezing, especially in high-intensity scenarios. Moreover, the study shows variations in anxiety levels and selected biomarkers, with cortisol and osteocalcin showing different patterns in low and high-intensity scenarios, and suggests a complex interplay between these factors, electrodermal activity, and stress perception.
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