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Haemodynamic responses to simulated long working hours in different age groups
Xinxin Liu1, Hiroki Ikeda2, Fuyuki Oyama2
1Research Center for Overwork-related Disorders, National Institute of Occupational Safety and Health, Kawasaki, Japan liu@h.jniosh.johas.go.jp.
Occupational and Environmental Medicine
|July 26, 2019
Summary
Older workers experience greater cardiovascular strain from long work hours. The 50s age group showed increased systolic blood pressure and total peripheral resistance compared to the 30s group during simulated extended work periods.
Area of Science:
- Occupational Health
- Cardiovascular Physiology
- Aging Research
Background:
- Long working hours are prevalent globally and associated with adverse health outcomes.
- Understanding age-related differences in physiological responses to occupational stress is crucial for worker well-being.
- Previous research indicates potential cardiovascular risks associated with prolonged work, but age-specific responses require further elucidation.
Purpose of the Study:
- To investigate and compare the haemodynamic responses to simulated long working hours across different adult age groups.
- To identify potential age-related vulnerabilities in cardiovascular regulation during sustained occupational demands.
Main Methods:
- A controlled study involving men aged 30s, 40s, and 50s performing simulated long work hours (09:00-22:00).
- Haemodynamic parameters, including systolic blood pressure (SBP) and total peripheral resistance (TPR), were measured during computer-based tasks.
- Statistical analysis using two-way repeated-measures ANOVA and Bonferroni post-hoc tests was employed to compare age groups.
Main Results:
- Systolic blood pressure (SBP) increased in the 40s and 50s age groups compared to baseline, while remaining stable in the 30s group.
- The 50s group exhibited significantly higher SBP than the 30s group, particularly in the later stages of the simulated workday.
- Elevated total peripheral resistance (TPR) was observed in the 50s group compared to the 30s group, indicating greater vascular strain.
Conclusions:
- Older workers, specifically those in their 50s, demonstrate heightened haemodynamic stress responses, including increased SBP and TPR, during prolonged working hours.
- These findings suggest that older individuals may be more susceptible to cardiovascular strain and potential damage from extended work schedules.
- Implications for occupational health policies and interventions aimed at mitigating cardiovascular risks in aging workforces are highlighted.
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