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- Larsman, Pernilla, 1976, et al.
(författare)
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Prognostic factors for intervention effect on neck/shoulder symptom intensity and disability among female computer users
- 2009
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Ingår i: Journal of Occupational Rehabilitation. - : Springer Science and Business Media LLC. - 1053-0487 .- 1573-3688. ; 19:3, s. 300-311
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: It has been suggested that treatments may be more effective when they are matched to patient characteristics. This study aimed at investigating potential prognostic factors for clinically relevant improvement in symptom intensity and symptom-related disability among employees with symptoms in the neck/shoulder area, receiving either ergonomics counseling or such counseling in combination with myofeedback training. Methods: A randomized controlled study was performed among female computer users aged 45 or older (n = 36). A clinical examination and a questionnaire survey were performed before inclusion in the study. Symptom intensity and disability was assessed using questionnaires before the start of the interventions (baseline) and at follow-ups directly after the end of the interventions (T0) and after 3 (T3) and 6 (T6) months. Logistis regression analyses were performed in order to assess prognostic factors for clinically relevant improvement in symptom intensity and disability. Results: Improvement in symptom intensity was consistently predicted by symptom intensity at baseline. Diagnosis and stress-induced lack of muscular rest were prognostic factors for improvement in symptom intensity at short-term follow-up. Baseline disability and passive coping consistently served as prognostic factors for outcome in disability. Few substantial differences were found between the interventions in terms of prognostic factors. Conclusions: Myofeedback training in combination with ergonomics counseling seem to be an especially beneficial tool for secondary prevention among employees with moderate levels of symptom intensity and symptom-related disability, who respond to work-related stress by increased/sustained muscle activation, and who tend to employ passive coping to deal with their neck/shoulder symptoms.
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- Sandsjö, Leif, 1958, et al.
(författare)
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MyoTel – a European initiative addressing neck-shoulder complaints at work combining telemedicine and myofeedback training intervention
- 2007
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Ingår i: Ergonomics for a Future - The 39th Nordic Ergonomics Society Conference, NES2007, 1-3 October, Lysekil, Sweden.
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Konferensbidrag (refereegranskat)abstract
- A recent intervention approach addressing neck-shoulder complaints is myofeedback training based on the Cinderella hypothesis. In a randomized controlled trial (RCT) comparing myofeedback training combined with ergonomic counselling to ergonomic counselling alone, the myofeedback intervention was found to have potential in reducing pain intensity and disability in females with neck-shoulder complaints at their regular workplace. This presentation summarise the results of the RCT study. It also describes a European initiative, MyoTel, assembled to draw on the experiences from the RCT study applying telemedicine techniques to increase the method’s applicability and facilitating its use in occupational health services.
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- Voerman, G, et al.
(författare)
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Changes in cognitive-behavioral factors and muscle activation patterns after interventions for work-related neck-shoulder complaints: Relations with discomfort and disability
- 2007
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Ingår i: Journal of Occupational Rehabilitation. ; 17, s. 593-609
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Knowledge regarding the working mechanism of an intervention is essential for obtaining a better understanding of the intervention and contributes to optimize its outcome. This study aimed at investigating whether changes in cognitive-behavioral factors and muscle activation patterns after myofeedback training and ergonomic counseling were associated with outcome, in subjects with work-related musculoskeletal neck-shoulder complaints. Methods: Seventy-nine symptomatic subjects received either myofeedback with ergonomic counseling (Mfb/EC) or ergonomic counseling alone (EC). Outcome measures discomfort and disability, and process factors catastrophizing, pain control, fear-avoidance beliefs, and muscle activation patterns were assessed at baseline, after the interventions (T0), and at 3 months follow-up (T3). Mixed modeling techniques were used for analysis. Results: Outcome in terms of discomfort and disability was generally comparable between both interventions. Catastrophizing was significantly reduced and fear-avoidance beliefs about work slightly increased after the interventions, but no consistent changes in muscle activation patterns were observed. Changes in discomfort were especially associated with changes in catastrophizing at T0 and T3, but R2 was low (\0.14). Reduced catastrophizing at T0 and T3, and also reduced fear-avoidance beliefs about work at T3, were related to reduced disability (R2 between 0.30 and 0.40). No differences between the two intervention groups were observed. Conclusions: Intervention effects were generally non-specific and findings suggested that cognitive-behavioral factors underlie the outcome of these interventions rather than changes in muscle activation patterns. Emphasizing these factors during therapy may increase the beneficial outcome of occupational interventions.
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- Voerman, G. E., et al.
(författare)
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Effects of ambulant myofeedback training and ergonomic counselling in female computer workers with work-related neck-shoulder complaints: A randomized controlled trial
- 2007
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Ingår i: Journal of Occupational Rehabilitation. - : Springer Science and Business Media LLC. - 1053-0487 .- 1573-3688. ; 17:1, s. 137-152
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To investigate the effects of ambulant myofeedback training including ergonomic counselling (Mfb) and ergonomic counselling alone (EC), on work-related neck-shoulder pain and disability. Methods: Seventy-nine female computer workers reporting neck-shoulder complaints were randomly assigned to Mfb or EC and received four weeks of intervention. Pain intensity in neck, shoulders, and upper back, and pain disability, were measured at baseline, immediately after intervention, and at three and six months follow-up. Results: Pain intensity and disability had significantly decreased immediately after four weeks Mfb or EC, and the effects remained at follow up. No differences were observed between the Mfb and EC group for outcome and subjects in both intervention groups showed comparable chances for improvement in pain intensity and disability. Conclusions: Pain intensity and disability significantly reduced after both interventions and this effect remained at follow-up. No differences were observed between the two intervention groups.
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- Voerman, G, et al.
(författare)
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Prognostic factors for the effects of two interventions for work-related neck-shoulder complaints: myofeedback training and ergonomic councelling
- 2008
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Ingår i: Applied Ergonomics. - : Elsevier BV. - 0003-6870 .- 1872-9126. ; 39:6, s. 743-753
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To explore prognostic factors for the effects of two interventions (myofeedback training in combination with ergonomic counselling (Mfb/EC) and ergonomic counselling alone (EC)) on discomfort and disability in work-related neck-shoulder complaints. Methods: Thirty-six females completed the interventions. Discomfort and disability were assessed at baseline, immediately after the intervention, and at 3-month follow-up. Potential sociodemographic and psychological prognostic factors were assessed using questionnaires. Data were analysed using multiple regression and general linear modelling. Results: Changes in discomfort were best predicted by baseline discomfort levels. Changes in disability were predicted by baseline disability levels, patient profile, and coping strategy 'ignoring sensations'. A significant difference between the Mfb/EC and EC group was found for coping strategy 'ignoring sensations', which appeared to be a predictor for changes in disability at 3-month follow-up in the Mfb/EC group only. Conclusions: Subjects with high levels of initial discomfort and disability and specific psychological patient profiles benefit most from interventions. Myofeedback training contributes a specific quality to those who ignore pain sensations. © 2007 Elsevier Ltd. All rights reserved.
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- Voerman, Sofie E., et al.
(författare)
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Dominance of photo over chromatic acclimation strategies by habitat-forming mesophotic red algae
- 2023
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Ingår i: Proceedings of the Royal Society of London. Biological Sciences. - : Royal Society. - 0962-8452 .- 1471-2954. ; 290:2008
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Tidskriftsartikel (refereegranskat)abstract
- Red coralline algae are the deepest living macroalgae, capable of creating spatially complex reefs from the intertidal to 100+ m depth with global ecological and biogeochemical significance. How these algae maintain photosynthetic function under increasingly limiting light intensity and spectral availability is key to explaining their large depth distribution. Here, we investigated the photo- and chromatic acclimation and morphological change of free-living red coralline algae towards mesophotic depths in the Fernando do Noronha archipelago, Brazil. From 13 to 86 m depth, thalli tended to become smaller and less complex. We observed a dominance of the photo-acclimatory response, characterized by an increase in photosynthetic efficiency and a decrease in maximum electron transport rate. Chromatic acclimation was generally stable across the euphotic-mesophotic transition with no clear depth trend. Taxonomic comparisons suggest these photosynthetic strategies are conserved to at least the Order level. Light saturation necessitated the use of photoprotection to 65 m depth, while optimal light levels were met at 86 m. Changes to the light environment (e.g. reduced water clarity) due to human activities therefore places these mesophotic algae at risk of light limitation, necessitating the importance of maintaining good water quality for the conservation and protection of mesophotic habitats.
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- Vollenbroek-Hutten, M., et al.
(författare)
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Are changes in pain induced by myofeedback training related to changes in muscle activation patterns in patients with work-related myalgia?
- 2006
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Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 96:2, s. 209-215
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this explorative study was to investigate to what extent changes in perceived pain, induced by myofeedback training, are correlated to changes in muscle activation patterns. Thirty subjects with work-related myalgia received myofeedback training. Before (T0), directly after (T1) and 4 weeks or, in a subset of patients, 3 months after (T2) this training, surface electromyography (sEMG) measurements of the upper trapezius muscle were performed during standardized computer tasks; a typing and a stress task. Besides this, visual analogue scales (VAS) were filled in to assess the levels of pain in the neck and shoulders. From the sEMG, root mean square (RMS) and relative rest time (RRT, i.e. the percentage of time RMS is below a certain threshold) were used for data analysis. The relationships between RRT, RMS and VAS at T0 as well as for the changes between T1-T0 and T2- T0 were investigated using Spearman correlation coefficients. The results revealed no significant correlations between VAS and RMS both at baseline (range R = -0.22 to 0.17) and for the observed changes (range R = -0.33 to 0.32). Also, for VAS and RRT, low correlations were found for baseline (range R = -0.27 to 0.21) and for changes between T1-T0 (range R = -0.02 to 0.38). However, for the changes between T2-T0, correlation coefficients for the VAS for the shoulder and the RRT of the right trapezius during both the typing and stress tasks were significant at the P = 0.05 level, whereas the correlation coefficients for the VAS for the neck and both the left and right trapezii during the stress task approached significance (P = 0.05 and P = 0.1, respectively). These results suggest that decreases in pain observed at long term follow up after myofeedback training might occur as a result of an increased ability to relax but not as a result of decreased muscle activation level. However, the largest correlation found was 0.6. This means that the maximal explained variance (R2) is low (36%), and that there are also other processes than the changes in muscle activation that contribute to changes in perceived pain.
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