Searched for: author:"Kingma, I."
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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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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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Tabasi, A. (author), Kingma, I. (author), de Looze, M.P. (author), van Dijk, W. (author), Koopman, A.S. (author), van Dieën, J.H. (author)
Back support exoskeletons are designed to prevent work-related low-back pain by reducing mechanical loading. For actuated exoskeletons, support based on moments actively produced by the trunk muscles appears a viable approach. The moment can be estimated by a biomechanical model. However, one of the main challenges here is the feasibility of...
article 2020
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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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de Vries, A.W. (author), Murphy, M. (author), Könemann, R. (author), Kingma, I. (author), de Looze, M. (author)
Occupational Applications. Our study quantified the extent of support provided by a passive arm-support exoskeleton throughout a range of postures. Mechanical support generated by the arm-support exoskeleton (SkelEx, Rotterdam, The Netherlands) that we tested clearly reaches its maximum at elevation angles ranging from 60° to 120°, where the...
article 2019
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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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Könemann, R. (author), Bosch, T. (author), Kingma, I. (author), van Dieën, J.H. (author), de Looze, M.P. (author)
In this study the effects of horizontal bin locations in an order picking workstation on upper arm elevation, trunk inclination and hand use were investigated. Eight subjects moved (self-paced) light or heavy products (0.2 and 3.0 kg) from a central product bin to an inner or outer order bin (at 60 or 150 cm) on the left or right side of the...
article 2015
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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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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieën, J.H. (author)
Objectives: Reported associations of physical exposures during work (eg, lifting, trunk flexion or rotation) and low-back pain (LBP) are rather inconsistent. Mechanical back loads (eg, moments on the low back) as a result of exposure to abovementioned risk factors have been suggested to be important as such loads provide a more direct...
article 2014
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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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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Twisk, J.W.R. (author), Bongers, P.M. (author), van Dieën, J.H. (author)
Purpose Much research has been performed on physical exposures during work (e.g. lifting, trunk flexion or body vibrations) as risk factors for low back pain (LBP), however results are inconsistent. Information on the effect of doses (e.g. spinal force or low back moments) on LBP may be more reliable but is lacking yet. The aim of the present...
article 2013
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Coenen, P. (author), Mathiassen, S.E. (author), Kingma, I. (author), Boot, C.R.L. (author), Bongers, P.M. (author), van Dieen, J.H. (author)
Session: 14. Exposure Assessment II
conference paper 2013
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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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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Twisk, J.W.R. (author), Bonger, P.M. (author), van Dieën, J.H. (author)
Much research has been performed on associations of physical exposures (e.g. lifting, trunk flexion or body vibrations) with low back pain (LBP). However, information on the effect of doses (e.g. spinal force or low back moments) on LBP is lacking. Cumulative low back load is significantly associated with the occurrence of LBP. Cumulative low...
public lecture 2011
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Faber, G.S. (author), Xu, X. (author), Bongers, P.M. (author), van Dieën, J.H. (author)
This study aimed to develop, compare and validate two versions of a video analysis method for assessment of low back moments during occupational lifting tasks since for epidemiological studies and ergonomic practice relatively cheap and easily applicable methods to assess low back loads are needed. Ten healthy subjects participated in a protocol...
article 2011
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Bonger, P.M. (author), van Dieën, J.H. (author)
public lecture 2011
Searched for: author:"Kingma, I."
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