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Peters, S.L.A. (author), Tabasi, A. (author), Kingma, I. (author), van Dijk, W. (author), van Dieën, J.H. (author)Mechanical loading of the low-back is an important risk factor for the development of low-back pain. Real-time estimation of the L5S1 joint moment (ML5S1) can give an insight to reduce mechanical loading. Model accuracy depends on sensor information, limiting the number of input variables to estimate ML5S1 increases practical feasibility, but...article 2023
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de Vries, A.W. (author), de Looze, M.P. (author), Krause, F. (author)Positive effects of arm support exoskeletons in reducing the shoulder load, have been reported mainly from laboratory studies. However, for exoskeletons to provide worker support in practice, they need to be accepted as well. Therefore, it is necessary to obtain insight into the user experience and attitude towards exoskeleton use, in relevant...bookPart 2022
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Brouwer, N.P. (author), Tabasi, A. (author), Moya-Esteban, A. (author), Sartori, M. (author), van Dijk, W. (author), Kingma, I. (author), van Dieen, J.H. (author)The effectiveness of exoskeletons could be enhanced by incorporating low back muscle fatigue estimates in their control. The aim of the present study was to evaluate whether low back muscle fatigue can be estimated using the spectral content of trunk extensor muscle high-density EMG (HDEMG) by considering the motor unit action potential...bookPart 2022
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Tabasi, A. (author), Lazzaroi, M. (author), Brouwer, N.P. (author), Kingma, I. (author), van Dijk, W. (author), de Looze, M.P. (author), Toxiri, S. (author), Ortiz, J. (author), van Dieen, J.H. (author)Estimation of low-back load can be used to determine the assistance to be provided by an actuated back-support exoskeleton. To this end, an EMG-driven muscle model and a regression model can be implemented. The goal of the regression model is to reduce the number of required sensors for load estimation. Both models need to be calibrated. This...bookPart 2022
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Kingma, B.R.M. (author), Koopmans, A.S. (author), de Looze, M.P. (author), van Dieen, J.H. (author)To evaluate the biomechanical effect of exoskeletons during lifting, three studies were performed to compare spine compression during lifting without and with three exoskeletons (Laevo, Robo-Mate, SPEXOR). In these studies, participants (11, 10 and 10, respectively) lifted boxes (10, 15 and 10 kg, respectively) from ankle height. Spine...bookPart 2022
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Koopman, A.S. (author), Kingma, I. (author), de Looze, M.P. (author), van Dieën, J.H. (author)Low-back pain is the number one cause of disability in the world, with mechanical loading as one of the major risk factors. Exoskeletons have been introduced in the workplace to reduce low back loading. During static forward bending, exoskeletons have been shown to reduce back muscle activity by 10% to 40%. However, effects during dynamic...article 2020
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Koopman, A.S. (author), Naf, M. (author), Baltrusch, S.J. (author), Kingma, I. (author), Rodriguez-Guerrero, C. (author), Babic, J. (author), de Looze, M.P. (author), van Dieën, J.H. (author)The number one cause of disability in the world is low-back pain, with mechanical loading as one of the major risk factors. To reduce mechanical loading, exoskeletons have been introduced in the workplace. Substantial reductions in back muscle activity were found when using the exoskeleton during static bending and manual materials handling....article 2020
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Schuring, M. (author), Robroek, S.J.W. (author), Carrino, L. (author), O'Prinsen, A.C. (author), Oude Hengel, K.M. (author), Avendano, M. (author), Burdorf, A. (author)Background: Declines in employment protection may have disproportionate effects on employment opportunities of workers with low education and poorer health. This study investigates the impact of changes in employment protection levels on employment rates according to education and health in 23 European countries. Methods: Data were taken from...article 2020
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Koopman, A.S. (author), Toxiri, S. (author), Power, V. (author), Kingma, I. (author), van Dieën, J.H. (author), Ortiz, J. (author), de Looze, M.P. (author)With mechanical loading as the main risk factor for LBP, exoskeletons (EXO)are designed to reduce the load on the back by taking over part of the moment normally generated by back muscles. The present study investigated the effect of an active exoskeleton, controlled using three different control modes (INCLINATION, EMG & HYBRID), on spinal...article 2019
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Koopman, A.S. (author), Kingma, I. (author), Faber, G.S. (author), de Looze, M.P. (author), van Dieën, J.H. (author)With mechanical loading as the main risk factor for LBP in mind, exoskeletons are designed to reduce the load on the back by taking over a part of the required moment. The present study assessed the effect of a passive exoskeleton on back and abdominal muscle activation, hip and lumbar flexion and on the contribution of both the human and the...article 2019
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Coenen, P. (author), Mathiassen, S.E. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieën, J.H. (author)Objectives: Exposure-outcome studies, for instance on work-related low-back pain (LBP), often classify workers into groups for which exposures are estimated from measurements on a sample of workers within or outside the specific study. The present study investigated the influence on bias and power in exposure-outcome associations of the sizes of...article 2015
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieën, J.H. (author)The trade-off between feasibility and accuracy of measurements of physical exposure at the workplace has often been discussed, but is unsufficiently understood. We therefore explored the effect of two low-back loading measurement tools with different accuracies on exposure estimates and their associations with low-back pain (LBP). Low-back...article 2015
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Siemonsma, P.C. (author), Stuive, I. (author), Roorda, L.D. (author), Vollebregt, J.A. (author), Walker, M.F. (author), Lankhorst, G.J. (author), Lettinga, A.T. (author)BACKGROUND:Illness perceptions have been shown to predict patient activities. Therefore, studies of the effectiveness of a targeted illness-perception intervention on chronic nonspecific low back pain (CLBP) are needed.OBJECTIVE:The purpose of this study was to compare the effectiveness of treatment of illness perceptions against a waiting list...article 2013
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieën, J.H. (author)Valid and reliable low-back load assessment tools that can be used in field situations are needed for epidemiologic studies and for ergonomic practice. The aim of this study was to assess the inter-rater reliability of a low-back load video-analysis method in a field setting.Five raters analyzed 50 work site manual material handling tasks of 14...article 2013
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Steenstra, I.A. (author), Lee, H. (author), de Vroome, E.M.M. (author), Busse, J.W. (author), Hogg-Johnson, S.J. (author)Introduction Return-to-work (RTW) status is an often used outcome in work and health research. In low back pain, work is regarded as a normal activity a worker should return to in order to fully recover. Comparing outcomes across studies and even jurisdictions using different definitions of RTW can be challenging for readers in general and when...article 2012
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Douwes, M. (author), Bongers, P.M. (author), van Dieën, J.H. (author)Work-related musculoskeletal pain (MSP) risk assessments by trained observers are often used in ergonomic practice; however, the validity may be questionable. We investigated the predictive value of work-site MSP risk estimates in a prospective cohort study of 1745 workers. Trained observers estimated the risk of MSP (neck, shoulder or low-back...article 2012
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieën, J.H. (author)Background: Cumulative low-back load is suggested to be associated with low back pain, possibly due to (micro-)fractures of spinal segments. Based on available in vitro data it can be assumed that, in order to predict spine segment failure from cumulative compressive loading, load magnitude should be weighted with an exponent higher than one,...article 2012
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Stomp-van den Berg, G.M. (author), Hendriksen, I.J.M. (author), Bruinvels, D.J. (author), Twisk, J.W.R. (author), van Mechelen, W. (author), van Poppel, M.N.M. (author)The objective of this study was to examine which factors during pregnancy and postpartum predict pelvic girdle pain (PGP) at 12 weeks postpartum among working women. A total of 548 Dutch pregnant employees were recruited in 15 companies, mainly health care, child care, and supermarkets. The definition of PGP was any pain felt in the pelvic...article 2012
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Hoozemans, M.J.M. (author), Koppes, L.L.J. (author), Twisk, J.W.R. (author), van Dieën, J.H. (author)STUDY DESIGN.: Longitudinal study of lumbar bone mass as predictor of low back pain (LBP). OBJECTIVE.: To investigate whether low bone mineral content (BMC) and bone mineral density (BMD) values at the age of 36 years are associated with the prevalence of LBP at the age of 42 years among the study population of the Amsterdam Growth and Health...article 2012
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Lambeek, L.C. (author), van Tulder, M.W. (author), Swinkels, I.C.S. (author), Koppes, L.L.J. (author), Anema, J.R. (author), van Mechelen, W. (author)Study Design.: Cost of illness study. Objective.: To investigate the total costs of back pain in the Netherlands over the years 2002 to 2007. Summary of Background Data.: In 1991, the cost of back pain to the Dutch society was estimated at &OV0556;4.2 billion. In the last two decades, new laws regarding health insurance and sickness benefits and...article 2011