Xinxin Liu 1 , Hiroki Ikeda 2 , Fuyuki Oyama 2 , Masaya Takahashi 2 Show Affiliations »
Abstract
OBJECTIVES: This study aimed to clarify haemodynamic responses of different age groups to simulated long working hours. METHODS: Men of three age groups participated in this study (16 in their 30s (mean 33.9±2.7 years old), 15 in their 40s (45.5±2.9) and 16 in their 50s (54.1±2.7)). All participants conducted 12 45-min personal computer-based tasks from 09:00 to 22:00. Nine 10-min to 15-min breaks between task periods, a 1-hour break at noon, and a 50-min break in the evening were provided. Haemodynamic responses were measured during task periods. All participants had normal resting systolic blood pressure (SBP <140 mm Hg) and diastolic blood pressure (DBP<90 mm Hg), which were measured before tasks started in the morning. Two-way repeated-measures analysis of variances and multiple comparisons (Bonferroni) were conducted. RESULTS: No haemodynamic indices were significantly different among groups at baseline. Compared with baseline, SBP was almost unchanged for the 30s group but increased for the 40s and 50s groups during task periods. The 50s group showed higher SBP compared with the 30s group especially in the latter half of the working hours (p<0.05). In addition, the 50s group also showed higher total peripheral resistance (TPR) than the 30s group (p<0.1). CONCLUSION: The 50s group showed higher SBP and TPR responses than the 30s group, especially in the latter half of working hours. These results suggest that older workers might suffer more cardiovascular damage related to long working hours. © Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ.
OBJECTIVES: This study aimed to clarify haemodynamic responses of different age groups to simulated long working hours. METHODS: Men of three age groups participated in this study (16 in their 30s (mean 33.9±2.7 years old), 15 in their 40s (45.5±2.9) and 16 in their 50s (54.1±2.7)). All participants conducted 12 45-min personal computer-based tasks from 09:00 to 22:00. Nine 10-min to 15-min breaks between task periods, a 1-hour break at noon, and a 50-min break in the evening were provided. Haemodynamic responses were measured during task periods. All participants had normal resting systolic blood pressure (SBP <140 mm Hg) and diastolic blood pressure (DBP<90 mm Hg), which were measured before tasks started in the morning. Two-way repeated-measures analysis of variances and multiple comparisons (Bonferroni) were conducted. RESULTS: No haemodynamic indices were significantly different among groups at baseline. Compared with baseline, SBP was almost unchanged for the 30s group but increased for the 40s and 50s groups during task periods. The 50s group showed higher SBP compared with the 30s group especially in the latter half of the working hours (p<0.05). In addition, the 50s group also showed higher total peripheral resistance (TPR) than the 30s group (p<0.1). CONCLUSION: The 50s group showed higher SBP and TPR responses than the 30s group, especially in the latter half of working hours. These results suggest that older workers might suffer more cardiovascular damage related to long working hours. © Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ.
Entities: Disease
Gene
Species
Keywords:
haemodynamic response; long working hour; older worker
Mesh： See more »
Year: 2019
PMID： 31340998 DOI： 10.1136/oemed-2019-105915
Source DB: PubMed Journal: Occup Environ Med ISSN： 1351-0711 Impact factor: 4.402