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Published on: June 5, 2019
Effects of Occupational Stress and Health Behaviors on Heart Rate Variability in Live-Fire Instructors
Inchan Shin1, So Yeon Kong, Gwan-Jin Park
1From the Department of Emergency Medicine, Chungbuk National University Hospital, Seowon-gu, Cheongju-si, Chungcheongbuk-do, South Korea (Shin, Dr Park, Dr Chai, Dr Kim, Dr Lee, and Dr Kim); Strategic Research, Laerdal Medical, Stavanger, Norway (Dr Kong); Department of Paramedic Science, Korea National University of Transportation, Jeungpyeong-gun, Chungcheongbuk-do, South Korea (Shin); Department of Emergency Medicine, College of Medicine, Chungbuk National University, Seowongu, Cheongjusi, Chungcheongbuk-do, South Korea (Dr Kim, Dr Lee, and Dr Kim).
Objectives:
This study aimed to identify the association between the healthrelated characteristics and the subscales of occupational stress of live fire instructors and heart rate variability (HRV).
Methods:
We conducted questionnaire survey on a general health checkup for 15 live fire instructors. Occupational stress and HRV parameters were measured to determine the association between health behavior, including smoking, drinking, exercise, and sleep-related disorders, and occupational stress of live fire instructors and HRV parameters using Spearman's rank correlation coefficient.
Results:
Smoking, insomnia, and job insecurity, a subscale of occupational stress measurement, showed negative Spearman rank correlations with HRV.
Conclusions:
Insomnia, smoking, and job insecurity (due to occupational stress) among live fire instructors were associated with decreased HRV.
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Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes

