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Occupational determinants of heart rate variability
L G van Amelsvoort1, E G Schouten, A C Maan
1Division of Human Nutrition and Epidemiology, Wageningen University, The Netherlands. Ludovic.vanamelsvoort@staff.nutepi.wau.nl
Summary
Heart rate variability (HRV) analysis reveals that shift work and job strain negatively impact cardiovascular autonomic regulation. Elevated sympathetic dominance was observed in workers facing high job demands or noise, suggesting HRV as a tool for assessing work-related stress.
Area of Science:
- Occupational Health
- Cardiovascular Physiology
- Autonomic Nervous System Regulation
Background:
- Work-related stressors are linked to cardiovascular autonomic dysregulation.
- Heart rate variability (HRV) is a potential indicator of these physiological effects.
- Previous studies suggest a connection between occupational stress and cardiovascular health.
Purpose of the Study:
- To evaluate the utility of HRV analysis in investigating the physiological impact of work-related stressors.
- To examine the relationship between job strain, noise, shift work, and HRV.
- To assess autonomic nervous system responses to occupational stressors.
Main Methods:
- Cross-sectional analysis of data from an ongoing cohort study.
- Calculation of mean HRV values during sleep and work from 135 24-h EKG recordings.
- Statistical analysis of the association between workplace stressors (job strain, noise, shift work) and HRV parameters (SDNNi, %LF).
Main Results:
- Shift workers showed significantly decreased SDNNi levels during sleep compared to day workers.
- Elevated %LF means during work were observed in employees with low demands/low control, high demands/high control, and high demands/low control job types.
- Workers exposed to high noise levels exhibited elevated %LF during work compared to those with low noise exposure.
Conclusions:
- Decreased SDNNi in shift workers suggests less favorable autonomic regulation, potentially explaining increased cardiovascular disease risk.
- Elevated %LF during work indicates a shift towards sympathetic dominance under high job strain or noise.
- HRV analysis is a valuable tool for studying the physiological effects of occupational stressors.