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Hand forces exerted by long-term care staff when pushing wheelchairs on compliant and non-compliant flooring
Purpose-designed compliant flooring and carpeting have been promoted as a means for reducing fall-related injuries in high-risk environments, such as long-term care. However, it is not known whether these surfaces influence the forces that long-term care staff exert when pushing residents in wheelchairs. We studied 14 direct-care staff who pushed a loaded wheelchair instrumented with a triaxial load cell to test the effects on hand force of flooring overlay (vinyl versus carpet) and flooring subfloor (concrete versus compliant rubber [brand: SmartCells]). During straight-line pushing, carpet overlay...
Identifying the critical physical demanding tasks of paramedic work
Towards the development of a physical employment standard Public safety related occupations including police, fire and military commonly apply physical employment standard (PES) to facilitate job matching, an approach to evaluate if candidates demonstrate acceptable physical capabilities as required to perform the job safely and effectively. In Canada, paramedics remain as one of the few public safety occupations without an evidence-based, validated PES. The purpose of this study was to document and describe the physical demands of paramedic work and to identify the most physically demanding tasks...
Cumulative occupational mechanical exposures during working life and risk of sickness absence and disability pension
Prospective cohort study Using a biomechanical job exposure matrix combined with Danish registers, cumulative occupational mechanical exposures throughout life (ie, more years with heavy and frequent lifting, and kneeling work) predicted risk of long-term sickness absence among older workers. Importantly, heavy lifting throughout working life was associated with disability pension. Source: Sundstrup E, Hansen ÅM, Mortensen EL, Poulsen OM, Clausen T, Rugulies R, Møller A, Andersen LL. (2017). Scand J Work Environ Health . http://dx.doi.org/10.5271/sjweh.3663
Méthode d'analyse de la charge physique de travail - Secteur sanitaire et social
La méthode d'analyse de la charge physique de travail dans le secteur sanitaire et social a été conçue pour être utilisée dans les établissements spécialisés (hôpitaux, cliniques, hébergements pour personnes âgées, handicapés, enfants) et les services d'aide et de soins à domicile. Elle permet de repérer et d'analyser les facteurs de risques pour l'appareil locomoteur en tenant compte de la globalité des composantes de l'activité. Elle propose une conduite...
Pushing and pulling: An assessment tool for OHS practitioners
A tool has been developed for supporting practitioners when assessing manual pushing and pulling operations based on an initiative by two global companies in the manufacturing industry. The aim of the tool is to support occupational health and safety practitioners in risk assessment and risk management of pushing and pulling operations in the manufacturing and logistics industries. It is based on a nine-multiplier equation that includes a wide range of factors affecting an operator's health risk and capacity in pushing and pulling. These multipliers are based on psychophysical, physiological...
Influence of Manual Labor at Work on Muscular Fitness and Its Relationship With Work Performance
Objective: The present study examined the influence of workplace manual labor on measures of muscular fitness, with a secondary aim to investigate the relationship between muscular fitness and work performance in blue-collar (BC) workers. Methods: Leg extension isokinetic strength at slow and fast velocities, hamstring and hip-flexor flexibility, and low back muscular endurance were examined in young and older BC workers and white-collar (WC) controls, while work performance was examined in the BC cohort. Results: There were no differences in muscular fitness variables between BC and WC groups;...
Sickness absence and permanent work disability in relation to upper- and lower-body pain and occupational mechanical and psychosocial exposures
Musculoskeletal pain in multiple sites has been associated with sickness absence and permanent work disability. We found that high occupational mechanical exposures were associated with sickness absence, particularly in case of combined pain in the upper and lower body. We also found that combined pain and low social support at work were associated with permanent work disability. Source: Sommer, T. G., Svendsen, S. W., & Frost, P. (2016). Scandinavian Journal of Work, Environment & Health . http://dx.doi.org/10.5271/sjweh.3600
Estimation du chargement au dos
Développement d'une méthode ambulatoire intégrant la cinématique du dos et de l'électromyographie De nombreux travailleurs1 sont atteints de maux de dos chaque année. La région lombaire est de loin celle qui est la plus fréquemment atteinte, et ce type de troubles musculosquelettiques est principalement occasionné par des efforts excessifs, surtout en soulevant quelque chose, et les chargements aux tissus de la colonne qu'ils engendrent. Il n'existe pas de méthode de mesure directe de ces chargements qui puisse...
Observed use of voluntary controls to reduce physical exposures among sheet metal workers of the mechanical trade
INTRODUCTION: Little is known about the transfer into the workplace of interventions designed to reduce the physical demands of sheet metal workers. METHODS: We reviewed videos from a case series of 15 sheet metal worksite assessments performed in 2007-2009 to score postures and physical loads, and to observe the use of recommended interventions to reduce physical exposures in sheet metal activities made by a NIOSH stakeholder meeting in 2002. RESULTS: Workers showed consistent use of material handling devices, but we observed few uses of recommended interventions to reduce exposures during overhead...
Effect of individually tailored biopsychosocial workplace interventions on chronic musculoskeletal pain and stress among laboratory technicians
Randomized controlled trial BACKGROUND: Chronic musculoskeletal pain is prevalent among laboratory technicians and work-related stress may aggravate the problem. OBJECTIVES: This study investigated the effect of a multifaceted worksite intervention on pain and stress among laboratory technicians with chronic musculoskeletal pain using individually tailored physical and cognitive elements. STUDY DESIGN: This trial uses a single-blind randomized controlled design with allocation concealment in a 2-armed parallel group format among laboratory technicians. The trial "Implementation of physical...
Influences on the use of observational methods by practitioners when identifying risk factors in physical work
Most observational methods for musculoskeletal disorder risk assessment have been developed by researchers to be applied in specific situations, and practitioners could find difficulties in their use in real-work conditions. The main objective of this study was to identify the factors which have an influence on how useful the observational techniques are perceived to be by practitioners and to what extent these factors influence their perception. A survey was conducted on practitioners regarding the problems normally encountered when implementing these methods, as well as the perceived overall...
Patterns of biomechanical demands are associated with musculoskeletal pain in the beginning of professional life
A population-based study Objectives: This study aimed to describe patterns of occupational biomechanical demands in the beginning of professional life and to quantify their association with the presence and intensity of regional musculoskeletal pain. Methods :Cross-sectional data from 21-year-old participants were collected during the third wave of the EPITeen cohort study (N=1733, 37.5% were workers). Ten different work-related biomechanical tasks were characterized. Latent class analysis was conducted to identify empirical patterns of occupational biomechanical demands. The presence and intensity...
Estimation du chargement lombaire au moyen de modèles biomécaniques articulaires
Évaluation et application Les troubles musculosquelettiques (TMS) et tout particulièrement les affections vertébrales constituent un fardeau autant pour la société que pour les personnes qui en sont affectées. Au Québec, le nombre d'affections vertébrales s'établissait en 2011 à 21 228 et elles représentaient près de 30 % de l'ensemble des lésions professionnelles indemnisées. C'est la région lombaire de la colonne vertébrale qui est la zone la plus touchée (60...
Are elderly construction workers sufficiently fit for heavy manual labour?
This study analysed the work ability of elderly construction workers. Forty male construction workers, 20 young (age < 33 yrs) and 20 senior (age>44 yrs) workers, were tested regarding aerobic power (VO2max) and muscle strength. The aerobic demand of a number of tasks in construction work was measured and compared with the workers' aerobic power. VO2max was higher for the young, and they performed better on most muscle strength tests. The measurements showed that about half of the senior workers had to use more than 30% of their maximum oxygen uptake on some tasks. In conclusion, because...
Are pushing and pulling work-related risk factors for upper extremity symptoms?
A systematic review of observational studies Systematically review observational studies concerning the question whether workers that perform pushing/pulling activities have an increased risk for upper extremity symptoms as compared to workers that perform no pushing/pulling activities. A search in MEDLINE via PubMed and EMBASE was performed with work-related search terms combined with push/pushing/pull/pulling. Studies had to examine exposure to pushing/pulling in relation to upper extremity symptoms. Two authors performed the literature selection and assessment of the risk of bias in the studies...
Further work for the development of an inspection tool for risk assessment of pushing and pulling force exertion
This work was commissioned to examine more closely the nature of the forces exerted during manual pushing and pulling operations and to provide a pushing and pulling risk assessment tool that aids identification of key workplace risk factors and measures for control of the risks that they present. It builds on the work reported in RR562 (HSE 2007). Magnitude of exerted force is one of several factors that may precipitate injury to the musculoskeletal system during pushing and pulling operations, but the force demands in any pushing and pulling operation are not an independent aspect; they are a...
Méthode d'analyse de la charge physique de travail
Conçue par des prescripteurs de prévention, cette brochure propose une méthode d'analyse des risques liés à la charge physique de travail. Elle permet de repérer et d'analyser les facteurs de risques pour l'appareil locomoteur en tenant compte de la globalité des composantes de l'activité. Elle permet également d'établir des priorités, d'orienter vers des pistes pertinentes de prévention et d'en évaluer l'efficacité. Source: http://www.inrs.fr/accueil/produits/mediatheque...
Efficient assessment of exposure to manual lifting using company data
"The objective of this study, based on an extensive dataset on manual materials handling during scaffolding, was to explore whether routinely collected company data can be used to estimate exposure to manual lifting. The number of manual lifts of scaffold parts while constructing/dismantling scaffolds was well predicted by the number of scaffolders in the team and the type of worksite, in combination with company data of either the number of scaffold parts or the scaffold volume. The proportion of explained variance in the number of lifts ranged from 77% to 92%, depending on the variables...
Éducateurs physiques : charge de travail et dépense énergétique
Une étude sur la charge de travail et la dépense énergétique des éducateurs physiques vient d'être publiée par l'IRSST. Elle démontre qu'en général la dépense énergétique des éducateurs physiques varie de faible à moyenne lorsqu'exprimée en valeur absolue. L'objectif principal de l'étude visait donc à quantifier la dépense énergétique de la tâche de l'éducateur physique dans son milieu de travail, en fonction de...
Physiological and Psychophysical Comparison Between a Lifting Task With Identical Weight but Different Coupling Factors
Adams, KJ, DeBeliso, M, Sevene-Adams, PG, Berning, JM, Miller, T, and Tollerud, DJ. Physiological and psychophysical comparison between a lifting task with identical weight but different coupling factors. J Strength Cond Res 24(2): 307-312, 2010-The objective of the revised NIOSH (National Institute for Occupational Safety and Health) lifting equation is to prevent or reduce lifting-related injuries. The coupling component of the equation relates to quality of the grip (i.e., hand-to-object interface) and can be rated good, fair, or poor. Good coupling is theorized to reduce lifting stress, whereas...

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