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. 2020 May 14:14:63.
doi: 10.3389/fnbeh.2020.00063. eCollection 2020.

The Interaction Between Physical and Psychosocial Stressors

Esraa S Abdelall  1   2 , Zoe Eagle  1 , Tor Finseth  1 , Ahmad A Mumani  1   3 , Zhonglun Wang  1 , Michael C Dorneich  1 , Richard T Stone  1
Affiliations

The Interaction Between Physical and Psychosocial Stressors

Esraa S Abdelall et al. Front Behav Neurosci. .

Abstract

Do physical and psychosocial stressors interact to increase stress in ways not explainable by the stressors alone? A preliminary study compared participants' stress response while subjected to a physical stressor (reduced or full physical load) and a predetermined social stressor (confronted by calm or aggressive behavior). Salivary cortisol samples measured endocrine stress. Heart rate variability (HRV) and electrodermal activity (EDA) measured autonomic stress. Perceived stress was measured via discomfort and stress state surveys. Participants with a heavier load reported increased distress and discomfort. Encountering an aggressive individual increased endocrine stress, distress levels, and perceived discomfort. Higher autonomic stress and discomfort were found in participants with heavier physical load and aggressive individuals. The results suggest a relationship where physical load increases the stressfulness of aggressive behavior in ways not explainable by the effects of the stressors alone. Future research is needed to confirm this investigation's findings.

Keywords: cortisol; heart rate variability; physical stress; psychosocial stress; stress.

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Figures

Figure 1
Figure 1
Experimental setup of the two vehicles.
Figure 2
Figure 2
Full-duty belt and body armor.
Figure 3
Figure 3
Experiment approximated timeline.
Figure 4
Figure 4
Means and standard error for normalized low-frequency (LF; A) and normalized high-frequency (HF) bands (B). Measured at 30-s intervals throughout trial.
Figure 5
Figure 5
Means and standard error for LF/HF ratio (A) and heart rate beats per minute (BPM; B). Measured at 30-s intervals throughout trial.
Figure 6
Figure 6
Cortisol response and standard error for (A) the physical load and (B) the behavior.
Figure 7
Figure 7
State changes for the Short Stress State Questionnaire (SSSQ) factors for the (A) physical load and (B) civilian behavior. Error bars are the standard errors.
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