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- Hallman, David, 1979-, et al.
(författare)
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Prolonged sitting is associated with attenuated heart rate variability during sleep in blue-collar workers
- 2015
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Ingår i: International Journal of Environmental Research and Public Health. - : MDPI AG. - 1661-7827 .- 1660-4601. ; 12:11, s. 14811-14827
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Tidskriftsartikel (refereegranskat)abstract
- Prolonged sitting is associated with increased risk for cardiovascular diseases and mortality. However, research into the physiological determinants underlying this relationship is still in its infancy. The aim of the study was to determine the extent to which occupational and leisure-time sitting are associated with nocturnal heart rate variability (HRV) in blue-collar workers. The study included 138 blue-collar workers (mean age 45.5 (SD 9.4) years). Sitting-time was measured objectively for four days using tri-axial accelerometers (Actigraph GT3X+) worn on the thigh and trunk. During the same period, a heart rate monitor (Actiheart) was used to sample R-R intervals from the electrocardiogram. Time and frequency domain indices of HRV were only derived during nighttime sleep, and used as markers of cardiac autonomic modulation. Regression analyses with multiple adjustments (age, gender, body mass index, smoking, job-seniority, physical work-load, influence at work, and moderate-to-vigorous physical activity) were used to investigate the association between sitting time and nocturnal HRV. We found that occupational sitting-time was negatively associated (p < 0.05) with time and frequency domain HRV indices. Sitting-time explained up to 6% of the variance in HRV, independent of the covariates. Leisure-time sitting was not significantly associated with any HRV indices (p > 0.05). In conclusion, objectively measured occupational sitting-time was associated with reduced nocturnal HRV in blue-collar workers. This indicates an attenuated cardiac autonomic regulation with increasing sitting-time at work regardless of moderate-to-vigorous physical activity. The implications of this association for cardiovascular disease risk warrant further investigation via long-term prospective studies and intervention studies.
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| 2. |
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| 3. |
- Nabe-Nielsen, Kirsten, et al.
(författare)
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The importance of individual preferences when evaluating the associations between working hours and indicators of health and well-being.
- 2010
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Ingår i: Applied Ergonomics. - : Elsevier BV. - 0003-6870 .- 1872-9126. ; 41:6, s. 779-86
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Tidskriftsartikel (refereegranskat)abstract
- Previous studies indicate that the effect of a given shift schedule may depend on individual factors. The aim of the present study was to investigate whether a misfit between individual preferences and actual working hours affected the association between working hours and self-reported indicators of health and well-being. The study population consisted of 173 female eldercare workers who mainly worked day or evening shifts. We combined self-reported questionnaire data on preferences with actual work schedules during a four-week period. The study showed that a misfit between preferences on one hand and "non-day work", "weekend work" or "only a few consecutive days off" on the other hand was associated with an increased dissatisfaction with working hours and/or an increase in the intention to leave the workplace due to one's working hours.
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| 4. |
- Palm, Peter, 1975-, et al.
(författare)
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Exposure to Upper Arm Elevation During Work Compared to Leisure Among 12 Different Occupations Measured with Triaxial Accelerometers.
- 2018
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Ingår i: Annals of Work Exposures and Health. - : Oxford University Press (OUP). - 2398-7308 .- 2398-7316. ; 62:6, s. 689-698
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Tidskriftsartikel (refereegranskat)abstract
- Regarding prevention of neck and shoulder pain (NSP), unsupported arm elevation is one factor that should be taken into account when performing work risk assessment. Triaxial accelerometers can be used to measure arm elevation over several days but it is not possible to differentiate between supported and unsupported arm elevation from accelerometers only. Supported arm elevation is more likely to exist during sitting than standing. The aim of the study was to evaluate the use of whole workday measurements of arm elevation with accelerometers to assess potentially harmful work exposure of arm elevation, by comparing arm elevation at work with arm elevation during leisure, in a population with diverse work tasks, and to assess how the exposure parameters were modified when upper arm elevation during sitting time was excluded. The participants, 197 workers belonging to 12 occupational groups with diverse work tasks, wore triaxial accelerometers on the dominant arm, hip, and back for 1-4 days to measure arm elevation and periods of sitting. None of the groups were found to have higher exposure to arm elevation during work compared to leisure. Even though some occupations where known to have work tasks that forced them to work with elevated arms to a large extent. A high proportion of arm elevation derived from sitting time, especially so during leisure. When arm elevation during sitting time was excluded from the analysis, arm elevation was significantly higher at work than during leisure among construction workers, garbage collectors, manufacturing workers, and domestic cleaners. Together this illustrates that it is not suitable to use whole workday measurments of arm elevation with accelerometer as a sole information source when assessing the risk for NSP due to arm elevation. Information on body posture can provide relevant contextual information in exposure assessments when it is known that the potential harmful exposure is performed in standing or walking.
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| 6. |
- Sato, Tatiana, et al.
(författare)
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Different autonomic responses to occupational and leisure time physical activities among blue-collar workers
- 2018
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Ingår i: International Archives of Occupational and Environmental Health. - : Springer Science and Business Media LLC. - 0340-0131 .- 1432-1246. ; 91:3, s. 293-304
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE:The differential effect of occupational and leisure time physical activity on cardiovascular health is termed the physical activity health paradox. Cardiac autonomic modulation could bring insights about the underlying mechanism behind this differential effect. The aim was to compare heart rate variability (HRV) during different activities (sitting, standing and moving) at work and leisure among blue-collar workers.METHODS:One hundred thirty-eight workers from the NOMAD cohort were included. Data from physical activity and HRV were obtained for 3-4 days using tri-axial accelerometers (Actigraph GT3X+) and a heart rate monitor (Actiheart). HRV indices were determined during sitting, standing and moving both at work and leisure. Linear mixed-models with two fixed factors (activities and domains) were applied to investigate differences in HRV indices adjusting for individual and occupational factors.RESULTS:The results showed significant effects of domain (p < 0.01), physical activity type (p < 0.01) and interaction between domain and activity type (p < 0.01) on HRV indices. Mean heart rate (IBI) and parasympathetic measures of HRV (RMSSD and HF) were lower for sitting (p < 0.01) and higher for moving (p < 0.01) during work compared with leisure, while no difference between domains was found for standing (p > 0.05). Sympathovagal balance (LF/HF) was higher during work for sitting and moving (p < 0.01), but showed no difference for standing (p = 0.62).CONCLUSIONS:Differences in cardiac autonomic modulation between work and leisure were found, indicating sympathetic predominance during work and parasympathetic predominance during leisure for sitting. Autonomic responses can be part of the mechanism that explains the differential effect of occupational and leisure time physical activity on health.
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| 7. |
- Sato, Tatiana, et al.
(författare)
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Different autonomic responses to occupational and leisure time physical activity among blue-collar workers
- 2016
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Konferensbidrag (refereegranskat)abstract
- Introduction: There is a well-established relationship between high physical activity at leisure time and decreased mortality risk. On the other hand, high physical demands at work seem to increase this risk. However, the underlying mechanism behind this effect remains unknown. Heart rate variability (HRV) measurements may bring some insight into the mechanism. Thus, the aim of this study was to determine whether HRV differs between work and leisure time among blue-collar workers.Methods: This study was based on data from the cross-sectional NOMAD study among blue-collar workers from seven workplaces in Denmark. One hundred thirty-eight blue-collar workers, which had at least 7 recording hours during work and leisure time were included in the analysis. Data from physical activity and HRV were obtained for four days using tri-axial accelerometers (Actigraph GT3X+) and heart rate monitor (Actiheart), respectively. Parametric (paired t test) and nonparametric (Wilcoxon signed-ranks test) tests for pairwise comparisons were applied to compare mean HRV indices in time and frequency domains between work and leisure time.Results: The mean age of the workers was 45.2 years, 51% were females, 42% were smokers, 18% reported lifetime occurrence of hypertension and 45% reported to perform lifting and carrying for more than half of the work time. A significant higher overall HRV was found during leisure time compared to work. Leisure time showed higher parasympathetic nervous system (PNS) measures of HRV (p<.05), while sympathetic nervous system (SNS) related indices (p<.05) were reduced in comparison to work.Conclusions: Leisure time showed high HRV and PNS indices and work time showed high SNS-related indices. The higher SNS modulation during work can be related to a greater risk of developing heart diseases among blue-collar workers.
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| 9. |
- Tornøe, Birte, et al.
(författare)
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Specific strength training compared with interdisciplinary counseling for girls with tension-type headache : A randomized controlled trial
- 2016
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Ingår i: Journal of Pain Research. - 1178-7090. ; 9, s. 257-270
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Tidskriftsartikel (refereegranskat)abstract
- Background: Childhood tension-type headache (TTH) is a prevalent and debilitating condition for the child and family. Low-cost nonpharmacological treatments are usually the first choice of professionals and parents. This study examined the outcomes of specific strength training for girls with TTH. Methods: Forty-nine girls aged 9–18 years with TTH were randomized to patient education programs with 10 weeks of strength training and compared with those who were counseled by a nurse and physical therapist. Primary outcomes were headache frequency, intensity, and duration; secondary outcomes were neck–shoulder muscle strength, aerobic power, and pericranial tenderness, measured at baseline, after 10 weeks intervention, and at 12 weeks follow-up. Health-related quality of life (HRQOL) questionnaires were assessed at baseline and after 24 months. Results: For both groups, headache frequency decreased significantly, P=0.001, as did duration, P=0.022, with no significant between-group differences. The odds of having headache on a random day decreased over the 22 weeks by 0.65 (0.50–0.84) (odds ratio [95% confidence interval]). For both groups, neck extension strength decreased significantly with a decrease in cervicothoracic extension/flexion ratio to 1.7, indicating a positive change in muscle balance. In the training group, shoulder strength increased ≥10% in 5/20 girls and predicted VO2max increased ≥15% for 4/20 girls. In the training group, 50% of girls with a headache reduction of ≥30% had an increase in VO2max >5%. For the counseling group, this was the case for 29%. A 24-month follow-up on HRQOL for the pooled sample revealed statistically significant improvements. Fifty-five percent of the girls reported little to none disability. Conclusion: The results indicate that both physical health and HRQOL can be influenced significantly by physical exercise and nurse counseling. More research is needed to examine the relationship between physical exercise, VO2max, and TTH in girls. Thus, empowering patient education to promote maximum possible outcomes for all children needs more attention.
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