| 1. |
- Elcadi, Guilherme H., 1966-, et al.
(författare)
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Oxygenation and Hemodynamics Do Not Underlie Early Muscle Fatigue for Patients with Work-Related Muscle Pain
- 2014
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Ingår i: PLOS ONE. - : PLOS (Public library of science). - 1932-6203. ; 9:4
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Tidskriftsartikel (refereegranskat)abstract
- Patients suffering from work-related muscle pain (WRMP) fatigue earlier during exercise than healthy controls. Inadequate oxygen consumption and/ or inadequate blood supply can influence the ability of the muscles to withstand fatigue. However, it remains unknown if oxygenation and hemodynamics are associated with early fatigue in muscles of WRMP patients. In the present study we applied near-infrared spectroscopy (NIRS) on the extensor carpi radialis (ECR) and trapezius (TD) muscles of patients with WRMP (n = 18) and healthy controls (n = 17). Our objective was to determine if there were group differences in endurance times for a low-level contraction of 15% maximal voluntary contraction (MVC) -sustained for 12-13 min, and to see if these differences were associated with differences in muscle oxygenation and hemodynamics. At baseline, oxygen saturation (StO(2)%) was similar between groups for the ECR, but StO2% was significantly lower for TD for the WRMP patients (76%) compared to controls (85%) (P < 0.01). Also, baseline ECR blood flow was similar in the two groups. For both muscles there were a larger number of patients, compared to controls, that did not maintain the 15% MVC for the allotted time. Consequently, the endurance times were significantly shorter for the WRMP patients than controls (medians, ECR: 347 s vs. 582 s; TD: 430 s vs. 723 s respectively). Responses in StO(2)% during the contractions were not significantly different between groups for either muscle, i.e. no apparent difference in oxygen consumption. Overall, we interpret our findings to indicate that the early fatigue for our WRMP patients was not associated with muscle oxygenation and hemodynamics.
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| 2. |
- Larisch, Lisa-Marie, et al.
(författare)
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Effects of two randomized and controlled multi-component interventions focusing on 24-hour movement behavior among office workers: A compositional data analysis
- 2021
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Ingår i: International Journal of Environmental Research and Public Health. - : MDPI AG. - 1661-7827 .- 1660-4601. ; 18
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Tidskriftsartikel (refereegranskat)abstract
- Intervention studies aiming at changing movement behavior have usually not accounted for the compositional nature of time-use data. Compositional data analysis (CoDA) has been sug-gested as a useful strategy for analyzing such data. The aim of this study was to examine the effects of two multi-component interventions on 24-h movement behavior (using CoDA) and on cardi-orespiratory fitness among office workers; one focusing on reducing sedentariness and the other on increasing physical activity. Office workers (n = 263) were cluster randomized into one of two 6-month intervention groups, or a control group. Time spent in sedentary behavior, light-intensity, moderate and vigorous physical activity, and time in bed were assessed using accelerometers and diaries, both for 24 h in total, and for work and leisure time separately. Cardiorespiratory fitness was estimated using a sub-maximal cycle ergometer test. Intervention effects were analyzed using linear mixed models. No intervention effects were found, either for 24-h behaviors in total, or for work and leisure time behaviors separately. Cardiorespiratory fitness did not change significantly. Despite a thorough analysis of 24-h behaviors using CoDA, no intervention effects were found, nei-ther for behaviors in total, nor for work and leisure time behaviors separately. Cardiorespiratory fitness did not change significantly. Although the design of the multi-component interventions was based on theoretical frameworks, and included cognitive behavioral therapy counselling, which has been proven effective in other populations, issues related to implementation of and compliance with some intervention components may have led to the observed lack of intervention effect.
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| 3. |
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| 4. |
- Brulin, Emma, 1980-, et al.
(författare)
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Gendered Associations of Flexible Work Arrangement and Perceived Flexibility with Work–Life Interference : A Cross-Sectional Mediation Analysis on Office Workers in Sweden
- 2023
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Ingår i: Social Indicators Research. - : Springer Nature. - 0303-8300 .- 1573-0921. ; 167:1-3, s. 571-588
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Tidskriftsartikel (refereegranskat)abstract
- Flexible work arrangements (FWA) may be beneficial for increasing perceived flexibility (i.e. control over when, where and how to work) and reducing interference between work and private-life, but knowledge of gendered patterns of these relationships is sparse. Drawing on gender theory, the aim of this study was to conduct gender-differentiated analyses of the associations between FWA (non-regulated work or flex-time) and work–life interference using perceived flexibility as a mediator. Survey data were collected in 2016 from a sample of 2614 employees in the Swedish Transport Administration (response rate 67%). The sample included 39.6% women and 60.4% men, 71.7% had non-regulated work and 28.3% flex-time. Associations were determined using linear mixed models and mediation analysis. Results indicated a beneficial effect of non-regulated work (referencing flex-time) on work–life interference through an increase in perceived flexibility. The indirect effect of FWA was pronounced and statistically significant in the total sample, as well as in men and women. However, in men, non-regulated work was associated with a statistically significant increase in interference (competitive mediation). Gender did not interact significantly with work arrangement nor with perceived flexibility. In conclusion, the type of FWA can result in different perceptions of flexibility which in turn may affect experiences of work–life interference. Furthermore, it should be acknowledged that both FWAs and flexibility may be experienced differently for men and women regarding interference. Thus, employers seeking to reduce employee interference should consider gender norms and individual needs.
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| 5. |
- Svensson, Sven, 1979-, et al.
(författare)
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Flexible work: Opportunity and Challenge (FLOC) for individual, social and economic sustainability. Protocol for a prospective cohort study of non-standard employment and flexible work arrangements in Sweden
- 2022
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Ingår i: BMJ Open. - : BMJ Publishing Group Ltd. - 2044-6055. ; 12:7
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Tidskriftsartikel (refereegranskat)abstract
- IntroductionFlexibility in working life, including non-standard employment (NSE) and flexible work arrangements (FWAs), offers the organisation a better ability to adapt to changing conditions while also posing considerable challenges for organisations as well as workers. The aim of the Flexible Work: Opportunity and Challenge (FLOC) study is to investigate associations between NSE and FWA on the one hand, and individual, social and economic sustainability on the other.Methods and analysis This prospective open cohort study targets approximately 8000 workers 18–65 years old in 8–10 public and private organisations in Sweden. We will use a comprehensive battery of measurement methods addressing financial performance, physical and psychosocial exposures, and physical and mental health, both at the organisational and the individual level. Methods include valid survey questionnaires and register data, and, in subpopulations, technical measurements, interviews and diaries. Main exposures are type of employment and type of work arrangement. Main outcomes are indicators of social and economic sustainability and, at the individual level, health and well-being. Data, collected over 54 months at approximately 18-month intervals, will be analysed using multivariate methods considering main effects as well as potential effect modifiers. The analyses will take into account that respondents are nested in organisations, divisions and/or have specific managers.Ethics and dissemination: FLOC is approved by the Swedish Ethical Review Authority (decision numbers 2019–06220, 2020–06094 and 2021–02725). Data will be published in peer-reviewed journals and presented at international conferences, and researchers will assist the organisations in improving policies and routines for employment and organisation of work.
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| 6. |
- Wijk, Katarina, et al.
(författare)
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Individual determinants of satisfaction with the work environment after relocation to activity-based workplaces: a prospective study
- 2023
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Ingår i: PLOS ONE. - : PLOS. - 1932-6203. ; 18:3
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Tidskriftsartikel (refereegranskat)abstract
- Relocation to activity-based workplaces influences work environment satisfaction, but individual determinants of changes in satisfaction remain unknown. The aim of the present study was to determine whether age, gender, education, occupational position, or office type before relocation can predict work environment satisfaction among employees and managers relocated to activity-based offices. Respondents (n=422) rated work environment satisfaction three months before and nine months after relocation. The findings indicate that, on average, satisfaction decreased after relocation, while for some workers it increased. Occupational position and office type at baseline predicted changes in satisfaction with the work environment; specifically, managers and those working in open-plan offices before relocation reported a smaller decline in satisfaction after relocation, compared to those relocating from private offices. Participants with no university education were more satisfied with the physical and psychosocial work environment in activity-based workplaces than those with a university degree.
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| 7. |
- Hallman, David, 1979-, et al.
(författare)
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Effects of static contraction and cold stimulation on cardiovascular autonomic indices, trapezius blood flow and muscle activity in chronic neck-shoulder pain
- 2011
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Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 111:8, s. 1725-1735
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to investigate reactions in trapezius muscle blood flow (MBF), muscle activity, heart rate variability (HRV) and systemic blood pressure (BP) to autonomic tests in subjects with chronic neck-shoulder pain and healthy controls. Changes in muscle activity and blood flow due to stress and unfavourable muscle loads are known underlying factors of work-related muscle pain. Aberration of the autonomic nervous system (ANS) is considered a possible mechanism. In the present study, participants (n = 23 Pain, n = 22 Control) performed autonomic tests which included a resting condition, static hand grip test (HGT) at 30% of maximal voluntary contraction, a cold pressor test (CPT) and a deep breathing test (DBT). HRV was analysed in time and frequency domains. MBF and muscle activity were recorded from the upper trapezius muscles using photoplethysmography and electromyography (EMG). The pain group showed reduced low frequency-HRV (LF) and SDNN during rest, as well as a blunted BP response and increased LF-HRV during HGT (a dagger systolic 22 mm Hg; a dagger LF(nu) 27%) compared with controls (a dagger systolic 27; a dagger LF(nu) 6%). Locally, the pain group had attenuated trapezius MBF in response to HGT (Pain 122% Control 140%) with elevated trapezius EMG following HGT and during CPT. In conclusion, only HGT showed differences between groups in systemic BP and HRV and alterations in local trapezius MBF and EMG in the pain group. Findings support the hypothesis of ANS involvement at systemic and local levels in chronic neck-shoulder pain.
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| 8. |
- Hallman, David M., et al.
(författare)
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Effects of Heart Rate Variability Biofeedback in Subjects with Stress-Related Chronic Neck Pain : A Pilot Study
- 2011
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Ingår i: Applied Psychophysiology and Biofeedback. - : Springer Science and Business Media LLC. - 1090-0586 .- 1573-3270. ; 36:2, s. 71-80
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Tidskriftsartikel (refereegranskat)abstract
- Recent studies focusing on autonomic nervous system (ANS) dysfunctions, together with theoretical pathophysiological models of musculoskeletal disorders, indicate the involvement of ANS regulation in development and maintenance of chronic muscle pain. Research has demonstrated the effectiveness of heart rate variability (HRV) biofeedback (BF) in increasing HRV and reducing the symptoms of different disorders characterized by ANS aberration. The study investigated the effects of resonance frequency HRV BF on autonomic regulation and perceived health, pain, stress and disability in 24 subjects with stress-related chronic neck-shoulder pain. Twelve subjects participated in 10 weekly sessions of resonant HRV BF and were compared to a control group. Subjective reports and HRV measures during relaxation and in response to a standardized stress protocol were assessed for both groups pre- and post-intervention. Group × time interactions revealed a significantly stronger increase over time in perceived health (SF-36) for the treatment group, including vitality, bodily pain and social functioning. Interactions were also seen for HRV during relaxation and reactivity to stress. The present pilot study indicates improvement in perceived health over a 10 week intervention with HRV-biofeedback in subjects with chronic neck-pain. Increased resting HRV as well as enhanced reactivity to hand grip and cold pressor tests might reflect beneficial effects on ANS regulation, and suggest that this intervention protocol is suitable for a larger controlled trial.
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| 9. |
- Bakken, Anders Galaasen, et al.
(författare)
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Are changes in pain associated with changes in heart rate variability in patients treated for recurrent or persistent neck pain?
- 2022
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Ingår i: BMC Musculoskeletal Disorders. - : BMC. - 1471-2474. ; 23:1
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundPersistent or recurrent neck pain is associated with perturbations in the autonomic nervous system balance, and nociceptive stimulation has been seen to influence this balance. However, very few prospective studies have addressed the extent to which changes in pain associate with changes in autonomic cardiac regulation. Therefore, we investigated if changes in pain vary with changes in heart rate variability in a cohort of patients treated for persistent or recurrent neck pain.MethodThis analysis is based on data from a randomized controlled trial in which participants were given home stretching exercises with or without spinal manipulative therapy for two weeks. As the effectiveness of the intervention (home stretching exercises and spinal manipulative therapy) was found to be equal to the control (home stretching exercises alone), all 127 participants were studied as one cohort in this analysis. During the intervention, pain levels were recorded using daily text messages, and heart rate variability was measured in the clinics three times over two weeks. Two approaches were used to classify patients based on changes in pain intensity: 1) Clinically important changes in pain were categorized as either "improved" or "not improved" and, 2) Pain development was measured using pain trajectories, constructed in a data driven approach. The association of pain categories and trajectories with changes in heart rate variability indices over time were then analysed using linear mixed models.ResultsHeart rate variability did not differ significantly between improved and not-improved patients, nor were there any associations with the different pain trajectories.ConclusionsIn conclusion, changes in pain after home stretching exercises with or without spinal manipulative therapy over two weeks were not significantly associated with changes in heart rate variability for patients with persistent or recurrent neck pain. Future studies should rely on more frequent measurements of HRV during longer treatment periods.Trial registrationThe trial was registered at ClinicalTrials.gov, registration number: NCT03576846.
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| 10. |
- Galaasen Bakken, Anders, et al.
(författare)
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The effect of spinal manipulative therapy and home stretching exercises on heart rate variability in patients with persistent or recurrent neck pain: a randomized controlled trial
- 2021
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Ingår i: Chiropractic and Manual Therapies. - : BMC. - 2045-709X. ; 29:1
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundPersistent or recurrent neck pain is, together with other chronic conditions, suggested to be associated with disturbances of the Autonomic Nervous System. Acute effects on the Autonomic Nervous System, commonly measured using Heart Rate Variability, have been observed with manual therapy. This study aimed to investigate the effect on Heart Rate Variability in (1) a combination of home stretching exercises and spinal manipulative therapy versus (2) home stretching exercises alone over 2 weeks in participants with persistent or recurrent neck pain.MethodsA randomized controlled clinical trial was carried out in five multidisciplinary primary care clinics in Stockholm from January 2019 to April 2020. The study sample consisted of 131 participants with a history of persistent or recurrent neck. All participants performed home stretching exercises daily for 2 weeks and were scheduled for four treatments during this period, with the intervention group receiving spinal manipulative therapy in addition to the home exercises. Heart Rate Variability at rest was measured at baseline, after 1 week, and after 2 weeks, with RMSSD (Root mean square of successive RR interval differences) as the primary outcome. Both groups were blinded to the other group intervention. Thus, they were aware of the purpose of the trial but not the details of the “other” intervention. The researchers collecting data were blinded to treatment allocation, as was the statistician performing data analyses. The clinicians provided treatment for participants in both groups and could not be blinded. A linear mixed-effects model with continuous variables and person-specific random intercept was used to investigate the group-time interaction using an intention to treat analysis.ResultsSixty-six participants were randomized to the intervention group and sixty-five to the control group. For RMSSD, a B coefficient of 0.4 (p value: 0.9) was found, indicating a non-significant difference in the regression slope for each time point with the control group as reference. No statistically significant differences were found between groups for any of the Heart Rate Variability indices.ConclusionAdding four treatments of spinal manipulation therapy to a 2-week program of daily stretching exercises gave no significant change in Heart Rate Variability.Trial Registration: The trial was registered 03/07/2018 at ClinicalTrials.gov, registration number: NCT03576846. (https://pubmed.ncbi.nlm.nih.gov/31606042/)
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