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Soni S, Ritchie AMA, Liu S, Pacilli M, Nataraja RM. Using wearable technology for Posture Regulation to Improve Surgical Ergonomics in the paediatric operating room: the UPRISE trial: a pilot study. Surg Endosc 2024:10.1007/s00464-024-10933-5. [PMID: 38902409 DOI: 10.1007/s00464-024-10933-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 05/17/2024] [Indexed: 06/22/2024]
Abstract
BACKGROUND The rising prevalence of work-related musculoskeletal disorders has numerous physical, financial, and mental repercussions for surgeons. This study aims to establish whether the use of a wearable posture device can improve the operating time spent in suboptimal, high-risk postures. METHODS Surgeons were recruited in Phase 1 of this prospective randomised study and baseline postural data was obtained. In Phase 2, participants were randomised to receive either a traditional educational workshop or intraoperative vibrations from the device to correct postural lapses. During minor elective day cases, intraoperative postural data was collected and stratified by forward flexion angle, into five risk categories (negligible to very high). Participants' experience with the sensor was also assessed. RESULTS A total of 100 surgical procedures (Phase 1: n = 50; Phase 2: n = 50) were performed by eight surgeons of varying seniority. Exposure to the educational intervention increased time spent in suboptimal posture (Phase 1 vs. Phase 2); 47.5% vs. 67.8%, p = 0.05. However, the vibrational intervention significantly reduced this time; 50.0% vs. 20.7%, p = 0.005. Procedure type didn't influence posture although, laparoscopic interventions spent most time in negligible-risk postures; 47.7% vs. 49.3%, compared to open procedures. Surgical consultants spent less time in suboptimal posture compared to fellow/registrars; 30.3% vs. 72.6% (Phase 1) and 33.8% vs. 65.3% (Phase 2). CONCLUSION Vibrational intervention from the device significantly decreased the time spent in suboptimal, high-risk postures. As procedure type wasn't correlated with postural changes, surgeon-specific factors in regulating posture are paramount. Finally, surgeon experience was positively correlated with improved surgical ergonomics.
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Affiliation(s)
- Suvarna Soni
- Departments of Paediatrics and Surgery, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - Angus M A Ritchie
- Departments of Paediatrics and Surgery, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - Sue Liu
- Departments of Paediatrics and Surgery, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - Maurizio Pacilli
- Departments of Paediatrics and Surgery, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
- Departments of Paediatric Surgery and Monash Children's Simulation, Monash Children's Hospital, 246 Clayton Road, Clayton, Melbourne, 3168, Australia
| | - Ramesh M Nataraja
- Departments of Paediatrics and Surgery, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia.
- Departments of Paediatric Surgery and Monash Children's Simulation, Monash Children's Hospital, 246 Clayton Road, Clayton, Melbourne, 3168, Australia.
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Brandt M, Bláfoss R, Jakobsen MD, Samani A, Ajslev JZN, Madeleine P, Andersen LL. Influence of brick laying height on biomechanical load in masons: Cross-sectional field study with technical measurements. Work 2024:WOR230325. [PMID: 38517831 DOI: 10.3233/wor-230325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024] Open
Abstract
BACKGROUND Work-related musculoskeletal disorders (WMSDs) located in the low back and neck/shoulder regions are major concerns for both workers, workplaces, and society. Masons are prone to WMSD, because their work is characterized by repetitive work and high physical workload. However, the knowledge on the physical workload during bricklaying is primarily based on subjective measurements. OBJECTIVE This cross-sectional field study with technical measurements aimed to quantify physical workload in terms of muscular activity and degree of forward bending during bricklaying at different working heights among masons, i.e., knee, hip, shoulder, and above shoulder height. METHODS Twelve male (36.1±16.1 years) experienced masons participated in a cross-sectional field study with technical measurements. Surface electromyography from erector spinae longissimus and upper trapezius muscles and an inertial measurement unit-sensor placed on the upper back were used to assess the physical workload (level of muscle activation and degree of forward bending) different bricklaying heights. Manual video analysis was used to determine duration of work tasks, frequency, type, and working height. The working heights were categorized as 'knee', 'hip', 'shoulder', and 'above shoulder'. The 95 percentiles of the normalized Root Mean Square (RMSn) values were extracted assess from erector spinae and trapezius recordings to assess strenuous level muscle of muscle activation. RESULTS The RMSn of dominant erector spinae muscle increased from hip- to shoulder height (from 26.6 to 29.6, P < 0.0001), but not from hip to above shoulder height and decreased from hip to knee height (from 26.6 to 18.9, P < 0.0001). For the dominant trapezius muscle, the RMSn increased from hip- to shoulder- and above shoulder height (from 13.9 to 19.7 and 24.0, respectively, P < 0.0001) but decreased from hip- to knee height (from 13.9 to 11.5, P < 0.0001). Compared to hip height (27.9°), an increased forward bending was detected during bricklaying at knee height (34.5°, P < 0.0001) and a decreased degree of forward bending at shoulder- and above shoulder height (17.6° and 12.5°, P < 0.0001, respectively). CONCLUSION Based on technical measurements, bricklaying at hip height showed the best compromise between muscular load and degree of forward bending. This study contributes to the development of the work environment for masons and can help guide preventive initiatives to reduce physical workload.
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Affiliation(s)
- Mikkel Brandt
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Rúni Bláfoss
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Research Unit for Muscle Physiology and Biomechanics, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | | | - Afshin Samani
- ExerciseTech, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
| | - Jeppe Z N Ajslev
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Pascal Madeleine
- ExerciseTech, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
| | - Lars L Andersen
- National Research Centre for the Working Environment, Copenhagen, Denmark
- ExerciseTech, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
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Tjøsvoll SO, Steiro Fimland M, Gonzalez V, Seeberg TM, Holtermann A, Færevik H, Wiggen Ø. Physical Work Demands of Maintenance Workers on Onshore Petroleum Facilities in Norway: An Observational Study Utilizing Wearable Sensor Technology. Ann Work Expo Health 2023; 67:706-719. [PMID: 37171985 PMCID: PMC10324642 DOI: 10.1093/annweh/wxad022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 04/05/2023] [Indexed: 05/14/2023] Open
Abstract
OBJECTIVES High physical work demands can cause musculoskeletal disorders and sick leave in petroleum workers. However, our knowledge of their physical work demands is scarce and based on self-report. The objective of our study is to work towards closing this knowledge gap by assessing the physical work demands of onshore petroleum maintenance workers using body-worn sensors. METHODS A total of 46 of 69 eligible maintenance workers (37 mechanics and 9 process technicians) from three onshore petroleum facilities in Norway filled in a questionnaire and diary and wore five accelerometers and a heart rate sensor for up to six consecutive workdays. Work-related physical activity and postures were classified using rule-based modelling in a modified version of the validated Acti4 software. RESULTS The onshore maintenance petroleum workers were working an average of 10 h a day and spent on average this time with 48% (SD = 16.5) sitting, 1% (SD = 2.8) lying down, 39% (SD = 16.2) in light physical activity, and 9% (SD = 3.8) in moderate to vigorous physical activity. During work hours while at feet, we found arm elevation ≥60° to be 11% (SD = 7.1) (68 min), and forward bending of the trunk ≥60° to be 2% (SD = 2.2) (14 min). The workers spent 2% (SD = 2.5) (12 minu) of the workhours kneeling. We observed a high inter-individual variation for all these work exposures. Moreover, 26% (12) of the workers conducted static standing for >30% of the workday, and 17% (8) spent more than half of the work hours >33% of their estimated maximal cardiovascular capacity. CONCLUSIONS While onshore maintenance petroleum workers on average spend about half of the workday sitting or lying down, the remaining worktime is spent with a rather high duration of arm elevation and forward bending. Quite high fraction of the workers spends much of the workhours in static standing and kneeling. We see a substantial variation in these work exposures between the workers. The findings indicate a need for preventive measures in how work is organized and performed.
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Affiliation(s)
- Svein O Tjøsvoll
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Edvard Griegs gate 8, Trondheim N-7491, Norway
| | - Marius Steiro Fimland
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Edvard Griegs gate 8, Trondheim N-7491, Norway
- Unicare Helsefort Rehabilitation Centre, Rissa, Hysnesveien 11, 7112 Hasselvika, Norway
| | - Victor Gonzalez
- Department of Smart Sensor and Microsystems, SINTEF Digital, SINTEF AS, Dept. of Health Research, P.O. Box 124 Blindern, NO-0314 Oslo, Norway
| | - Trine M Seeberg
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Edvard Griegs gate 8, Trondheim N-7491, Norway
- Department of Smart Sensor and Microsystems, SINTEF Digital, SINTEF AS, Dept. of Health Research, P.O. Box 124 Blindern, NO-0314 Oslo, Norway
| | - Andreas Holtermann
- Department of Musculoskeletal Disorders and Physical Workload, National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark
| | - Hilde Færevik
- Department of Health Research, SINTEF Digital, SINTEF AS, P.O. Box 4760 Torgaarden, NO-7465 Trondheim, Norway
| | - Øystein Wiggen
- Department of Health Research, SINTEF Digital, SINTEF AS, P.O. Box 4760 Torgaarden, NO-7465 Trondheim, Norway
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Liaset IF, Fimland MS, Holtermann A, Mathiassen SE, Redzovic S. Can home care work be organized to promote health among the workers while maintaining productivity? An investigation into stakeholders' perspectives on organizational work redesign concepts based on the Goldilocks Work principles. BMC Health Serv Res 2023; 23:667. [PMID: 37340464 DOI: 10.1186/s12913-023-09691-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/13/2023] [Indexed: 06/22/2023] Open
Abstract
BACKGROUND Due to the aging population, the need for home care services is increasing in most Western countries, including Norway. However, the highly physical nature of this job could contribute to make recruiting and retaining qualified home care workers (HCWs) challenging. This issue may be overcome by adopting the Goldilocks Work principles, aiming at promoting workers' physical health by determining a "just right" balance between work demands and recovery periods while maintaining productivity. The aim of this study was to 1) gather suggestions from home care employees on suitable organizational (re)design concepts for promoting HCWs' physical health and 2) have researchers and managers define actionable behavioral aims for the HCWs for each proposed (re)design concept and evaluate them in the context of the Goldilocks Work principles. METHODS HCWs, safety representatives, and operation coordinators (n = 14) from three Norwegian home care units participated in digital workshops led by a researcher. They suggested, ranked, and discussed redesign concepts aimed at promoting HCWs' health. The redesign concepts were subsequently operationalized and evaluated by three researchers and three home care managers. RESULTS Workshop participants suggested five redesign concepts, namely "operation coordinators should distribute work lists with different occupational physical activity demands more evenly between HCWs", "operation coordinators should distribute transportation modes more evenly between HCWs", "Managers should facilitate correct use of ergonomic aids and techniques", "HCWs should use the stairs instead of the elevator", and "HCWs should participate in home-based exercise training with clients". Only the first two redesign concepts were considered to be aligned with the Goldilocks Work principles. A corresponding behavioral aim for a "just right" workload was defined: reduce inter-individual differences in occupational physical activity throughout a work week. CONCLUSIONS Operation coordinators could have a key role in health-promoting organizational work redesign based on the Goldilocks Work principles in home care. By reducing the inter-individual differences in occupational physical activity throughout a work week, HCWs' health may be improved, thus reducing absenteeism and increasing the sustainability of home care services. The two suggested redesign concepts should be considered areas for evaluation and adoption in practice by researchers and home care services in similar settings.
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Affiliation(s)
- Ingeborg Frostad Liaset
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway.
| | - Marius Steiro Fimland
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
- Unicare Helsefort Rehabilitation Centre, Rissa, Norway
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Svend Erik Mathiassen
- Department of Occupational Health Science and Psychology, Centre for Musculoskeletal Research, University of Gävle, Gävle, Sweden
| | - Skender Redzovic
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
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Musculoskeletal disorders among undergraduate radiography students during work integrated learning in Kwazulu-Natal, South Africa. J Med Imaging Radiat Sci 2023; 54:153-161. [PMID: 36646548 DOI: 10.1016/j.jmir.2022.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 12/08/2022] [Accepted: 12/13/2022] [Indexed: 01/15/2023]
Abstract
BACKGROUND Musculoskeletal disorders (MSDs) are a group of painful muscle, tendon, and nerve disorders. These disorders are common among healthcare students, including those studying radiography. However, there is a paucity of current literature on the prevalence of MSDs among undergraduate radiography students attending Work Integrated Learning (WIL). To date, no study has been conducted to determine the risk factors for developing MSDs among radiography students in the Kwazulu-Natal province, therefore this study was necessary. OBJECTIVE The aims of the study were to determine the prevalence of MSDs and to identify the risk factors associated with MSDs among undergraduate radiography students attending WIL within hospitals in the eThekwini Municipality, Kwazulu-Natal. METHODS The research conducted was a quantitative study with a descriptive design that targeted radiography students attending WIL within the hospital of eThekwini, KwaZulu Natal. The research questionnaires about the prevalence of MSDs and associated risk factors were given to the students who consented to participate in the study. The data were analysed using Microsoft Excel and SPSS version 23. RESULTS In total, 144 questionnaires were utilised for statistical analysis, the number of females (76.4%) was higher than men (23.6%). The majority of the participants were aged between 20 to 24 years year old (81.3%). The results further showed a significantly high prevalence of MSDs among the radiography students (92.4%). The most common areas of pain reported by the participants were the lower back (79.7%), neck (72.2%) and upper back (54.1%). The statistically significant risk factors for MSDs among students were bending (p =0.038.), stress (p= 0.028) and depression (p=0.032). CONCLUSION AND RECOMMENDATIONS The study showed that the prevalence of MSDs is high among undergraduate radiography students during WIL. To prevent the recurrence of MSDs among students, it is recommended that the faculty of health sciences and the radiography department design and implement suitable interventions, such as an educational program/training on ergonomics practice.
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Gupta N, Bjerregaard SS, Yang L, Forsman M, Rasmussen CL, Nørregaard Rasmussen CD, Clays E, Holtermann A. Does occupational forward bending of the back increase long-term sickness absence risk? A 4-year prospective register-based study using device-measured compositional data analysis. Scand J Work Environ Health 2022; 48:651-661. [PMID: 35894796 PMCID: PMC10546616 DOI: 10.5271/sjweh.4047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE Forward bending of the back is common in many jobs and a risk factor for sickness absence. However, this knowledge is based on self-reported forward bending that is generally imprecise. Thus, we aimed to investigate the dose-response relation between device-measured forward bending at work and prospective register-based risk of long-term sickness absence (LTSA). METHODS At baseline, 944 workers (93% from blue-collar jobs) wore accelerometers on their upper back and thigh over 1-6 workdays to measure worktime with forward bending (>30˚ and >60˚) and body positions. The first event of LTSA (≥6 consecutive weeks) over a 4-year follow-up were retrieved from a national register. Compositional Cox proportional hazard analyses were used to model the association between worktime with forward bending of the back in an upright body position and LTSA adjusted for age, sex, body mass index (BMI), occupational lifting/carrying, type of work, and, in an additional step, for leisure time physical activity (PA) on workdays. RESULTS During a mean worktime of 457 minutes/day, the workers on average spent 40 and 10 minutes on forward bending >30˚ and >60˚ in the upright position, respectively. Five more minutes forward bending >30˚ and >60˚ at work were associated with a 4% [95% confidence interval (CI) 1.01-1.07] and 8% (95% CI 1.01-1.16) higher LTSA risk, respectively. Adjustment for leisure-time PA did not influence the results. CONCLUSION We found a dose-response association between device-measured forward bending of the back and prospective LTSA risk. This knowledge can be integrated into available feasible methods to measure forward bending of the back for improved workplace risk assessment and prevention.
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Affiliation(s)
- Nidhi Gupta
- Department of musculoskeletal disorders and physical workload, National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Søren Skotte Bjerregaard
- Department of analysis and data, National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Liyun Yang
- School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Huddinge, Sweden
- IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Forsman
- School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Huddinge, Sweden
- IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Charlotte Lund Rasmussen
- Department of musculoskeletal disorders and physical workload, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway
- Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic
| | | | - Els Clays
- Department of Public Health and Primary Care, Ghent University, Ghent, Belgium
| | - Andreas Holtermann
- Department of musculoskeletal disorders and physical workload, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
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Tjøsvoll SO, Wiggen Ø, Gonzalez V, Seeberg TM, Elez Redzovic S, Frostad Liaset I, Holtermann A, Steiro Fimland M. Assessment of Physical Work Demands of Home Care Workers in Norway: An Observational Study Using Wearable Sensor Technology. Ann Work Expo Health 2022; 66:1187-1198. [PMID: 35959647 PMCID: PMC9664225 DOI: 10.1093/annweh/wxac052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/24/2022] [Accepted: 07/20/2022] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES High physical work demands are believed to be partly responsible for the high sickness absence among home care workers, but no studies have assessed their physical work demands using precise device-based measurements. Hence, the objective of this observational study was to assess physical work demands in home care, using wearable sensors. METHODS From six home care units in a large municipality in Norway, 114 of 195 eligible home care workers filled in a questionnaire, a diary about work hours, and wore five accelerometers, and a heart rate sensor for up to six consecutive workdays. RESULTS On average, the homecare workers spent 50% of the working hours sitting, 25.2% standing, 11.4% moving, 8.3% walking fast, 1.9% walking slow, 1.2% stair-climbing, 0.3% cycling, and 0.05% running. We found the following exposures to demanding postures: arm-elevation in an upright body position ≥30° was 36.7%, ≥60° was 4.1%, and ≥90°was 0.5%; forward trunk inclination in an upright body position ≥30° was 9.9%, ≥60° was 4%, and ≥90° was 1%; and for kneeling it was 0.8%. We found the average cardiovascular load (%heart rate reserve) during work to be 28%. There was considerable individual variation in these physical exposures at work. CONCLUSIONS This study presents precise information on various physical work demands of home care workers in Norway. Home care workers spent on average half the workday sitting and the remaining time in various occupational physical activities. Presently, few device-based exposure limits have been proposed for acceptable amounts of occupational physical exposures, but the level of arm-elevation, forward trunk inclination, and the considerable variation of physical workloads among home care workers, indicate that preventive measures should be taken.
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Affiliation(s)
| | - Øystein Wiggen
- Health Research, SINTEF DIGITAL, SINTEF AS, Trondheim, Norway
| | - Victor Gonzalez
- Smart Sensor Systems, SINTEF DIGITAL, SINTEF AS, Oslo, Norway
| | - Trine M Seeberg
- Smart Sensor Systems, SINTEF DIGITAL, SINTEF AS, Oslo, Norway
| | - Skender Elez Redzovic
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Ingeborg Frostad Liaset
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Lerso Parkalle, Copenhagen, Denmark
| | - Marius Steiro Fimland
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU Norwegian University of Science and Technology, Trondheim, Norway,Unicare Helsefort Rehabilitation Centre, Rissa, Norway
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Fan X, Lind CM, Rhen IM, Forsman M. Effects of Sensor Types and Angular Velocity Computational Methods in Field Measurements of Occupational Upper Arm and Trunk Postures and Movements. SENSORS 2021; 21:s21165527. [PMID: 34450967 PMCID: PMC8401405 DOI: 10.3390/s21165527] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/05/2021] [Accepted: 08/12/2021] [Indexed: 12/15/2022]
Abstract
Accelerometer-based inclinometers have dominated kinematic measurements in previous field studies, while the use of inertial measurement units that additionally include gyroscopes is rapidly increasing. Recent laboratory studies suggest that these two sensor types and the two commonly used angular velocity computational methods may produce substantially different results. The aim of this study was, therefore, to evaluate the effects of sensor types and angular velocity computational methods on the measures of work postures and movements in a real occupational setting. Half-workday recordings of arm and trunk postures, and movements from 38 warehouse workers were compared using two sensor types: accelerometers versus accelerometers with gyroscopes-and using two angular velocity computational methods, i.e., inclination velocity versus generalized velocity. The results showed an overall small difference (<2° and value independent) for posture percentiles between the two sensor types, but substantial differences in movement percentiles both between the sensor types and between the angular computational methods. For example, the group mean of the 50th percentiles were for accelerometers: 71°/s (generalized velocity) and 33°/s (inclination velocity)-and for accelerometers with gyroscopes: 31°/s (generalized velocity) and 16°/s (inclination velocity). The significant effects of sensor types and angular computational methods on angular velocity measures in field work are important in inter-study comparisons and in comparisons to recommended threshold limit values.
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Affiliation(s)
- Xuelong Fan
- IMM Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (X.F.); (I.-M.R.); (M.F.)
| | - Carl Mikael Lind
- IMM Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (X.F.); (I.-M.R.); (M.F.)
- Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Hälsovägen 11C, SE-141 57 Huddinge, Sweden
- Correspondence:
| | - Ida-Märta Rhen
- IMM Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (X.F.); (I.-M.R.); (M.F.)
- Centre for Occupational and Environmental Medicine, Stockholm County Council, SE-113 65 Stockholm, Sweden
- Department of Industrial and Materials Science, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Mikael Forsman
- IMM Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (X.F.); (I.-M.R.); (M.F.)
- Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Hälsovägen 11C, SE-141 57 Huddinge, Sweden
- Centre for Occupational and Environmental Medicine, Stockholm County Council, SE-113 65 Stockholm, Sweden
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Lunde LK, Merkus S, Koch M, Knardahl S, Wærsted M, Veiersted KB. Associations of objectively measured total duration and maximum bout length of standing at work with lower-extremity pain intensity: a 2-year follow-up of construction and healthcare workers. BMC Musculoskelet Disord 2021; 22:43. [PMID: 33413254 PMCID: PMC7791765 DOI: 10.1186/s12891-020-03868-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 12/09/2020] [Indexed: 11/28/2022] Open
Abstract
Background Musculoskeletal disorders are among the major reasons for years lived with disability. Approximately one third of the European working population report lower-extremity discomfort and many attribute these discomforts to work-related factors. Employees in the healthcare and construction sectors reports high levels of lower-extremity pain and commonly relate the pain to their profession. These workers spend a large part of their workday standing. Periods of prolonged standing is suggested to increase lower-extremity symptoms, but this cannot be concluded on, since limited evidence is available from longitudinal studies using objective measures. This study aimed to determine possible associations between objectively measured total duration and maximum bout length of static- and dynamic standing at work and lower-extremity pain intensity (LEPi) among Norwegian construction- and healthcare workers. Methods One-hundred and twenty-three construction and healthcare workers wore two accelerometers for up to four consecutive days, to establish standing behavior at baseline. The participants reported LEPi (Likert scale 0–9) for the preceding 4 weeks at baseline and after 6, 12, 18, and 24 months. We investigated associations between standing at work and average and change in LEPi using linear mixed models with significance level p ≤ 0.05. Results Total duration of static- and dynamic standing showed weak associations with average LEPi, for the total sample and for construction workers. Maximum bout of static- and dynamic standing was associated with average LEPi in construction workers, but not in healthcare workers. Furthermore, we found no associations between standing and change in LEPi over the 2-year follow-up in any of our analyses. Conclusions This study indicate that objectively measured standing is associated with average LEPi over 2-years follow-up in construction workers, and that maximal bout of standing have a stronger association to LEPi than total duration. For every 10 min added to the maximal length of continuous standing during an average workday, we found approximately one unit increase in pain on a 0–9 scale. The lack of significant findings in analyses on healthcare workers suggest that the association between standing and LEPi depend on work-tasks, gender and/or other sector-specific factors. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-020-03868-0.
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Affiliation(s)
- Lars-Kristian Lunde
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway.
| | - Suzanne Merkus
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway
| | - Markus Koch
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway
| | - Stein Knardahl
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway
| | - Morten Wærsted
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway
| | - Kaj Bo Veiersted
- National Institute of Occupational Health, P.O. Box 5330, Majorstuen, 0304, Oslo, Norway
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Ribeiro DC, Milosavljevic S, Terry J, Abbott JH. Effectiveness of a lumbopelvic monitor and feedback device to change postural behaviour: the ELF cluster randomised controlled trial. Occup Environ Med 2020; 77:462-469. [PMID: 32253227 DOI: 10.1136/oemed-2019-106293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The aim of this clustered, randomised controlled trial was to assess the effectiveness of a lumbopelvic postural feedback device for changing postural behaviour in a group of healthcare workers. We hypothesised that workers exposed to auditory postural feedback would reduce the number of times forward bending posture is adopted at work. METHODS This was a participant and assessor blinded, randomised, sham-controlled trial with blocked cluster random allocation. We recruited healthcare workers from aged care institutions. Healthcare sites were randomly allocated to the feedback or sham group (SG). A postural monitoring and feedback device was used to monitor and record lumbopelvic forward bending posture, and provided audio feedback whenever the user sustained lumbopelvic forward bending posture that exceeded predefined thresholds. The primary outcome measure was postural behaviour (exceeding thresholds). We used a robust variant of repeated measures mixed-effect model for assessing within-group and between-group differences in postural behaviour. RESULTS We recruited 19 sites, and 130 healthcare workers participated. There were no within-group changes on the number of times postural threshold was exceeded at 1-week follow-up (feedback group: -0.7, 95% CI -2.61 to 0.72; SG -0.3, -1.65 to 0.98), and no differences (0.05, 95% CI -1.83 to 1.94) between SG and feedback group. CONCLUSIONS Findings from this trial indicate that audio feedback provided by a postural monitor device did not reduce the number of times healthcare workers exceeded the postural threshold. TRIAL REGISTRATION NUMBER ACTRN12616000449437.
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Affiliation(s)
| | - Stephan Milosavljevic
- School of Physiotherapy, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Jane Terry
- School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - J H Abbott
- Department of Surgical Sciences, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
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