Manual handling techniques: Comparing novices and experts

Authier, Marie; Lortie, Monique; Gagnon, Martin

doi:10.1016/0169-8141(95)00005-4

Cited by 99 publications

(41 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We selected employees with more than three years of experience in order to prevent the confounding factor of inexperience, reported by Authier et al [1] and Chen et al [3], from influencing our results.…”

Section: Discussionmentioning

confidence: 99%

Kinematic and electromyographic assessment of manual handling on a supermarket green- grocery shelf

Silvetti

Mari

Ranavolo

et al. 2015

WOR

View full text Add to dashboard Cite

Abstract. BACKGROUND:There are few epidemiological data regarding musculoskeletal disorders (MSDs) in retail industry. Biomechanical risk assessment in ergonomics is commonly performed in retail sector using standardized protocols. However, such protocols have numerous limitations, such as the lack of objectivity or applicability and restrictive conditions. OBJECTIVE: The aim of this study was to analyze one of the most commonly used shelves in vegetable and fruit departments in order to investigate the effect of different shelf levels (i.e. with variations in height and horizontal distance) and load weights on the workers' biomechanical load. METHODS: We investigated trunk, shoulder, elbow, hip, knee and ankle joint ROMs, as well as the mean and peak EMG values of the upper limb, trunk and lower limb muscles. RESULTS: We found that shelf level has a significant effect on most of the parameters examined, whereas within this limited range of 6 and 8 kg, weight does not affect the biomechanical load. We also identified the shelf levels that place the least and most strain on the musculoskeletal system. CONCLUSIONS: We therefore recommend that the height and horizontal distance be carefully considered when shelves are being designed. Kinematic and EMG approach may help to objectively assess shelf-related risks. Our findings are in agreement with RNLE LI values and therefore support RNLE.

show abstract

Section: Discussionmentioning

confidence: 99%

Kinematic and electromyographic assessment of manual handling on a supermarket green- grocery shelf

Silvetti

Mari

Ranavolo

et al. 2015

WOR

View full text Add to dashboard Cite

show abstract

“…Results presented by Authier, Lortie and Gagnon 44 showed that experienced workers used a wide variety of grips and different strategies to carry out even a simple handling task. Even when static conditions were evaluated novice and experts showed different strategies to generate power 20 .…”

mentioning

confidence: 99%

How do low/high height and weight variation affect upper limb movements during manual material handling of industrial boxes?

Oliveira¹,

Silva²,

Coury³

2011

Rev. bras. fisioter.

View full text Add to dashboard Cite

Objectives: To evaluate the effect of surface height and load weight on upper limb movements and electromyographic (EMG) recordings during manual handling performed by both experienced and inexperienced lifter subjects. Methods: Sixteen experienced and sixteen inexperienced lifters handled a box (both 7 and 15 kg) from an intermediate height (waist level) to either a high or low surface.Electromyography and video images were recorded during the tasks. The 10 th , 50 th and 90 th percentiles were calculated for the deltoid and biceps muscles, shoulder flexion, shoulder abduction, and elbow flexion movements. Groups, right/left sides, weights and heights were compared. There were no differences between either groups or sides. Results: Weight and height variations affected EMG and posture, although weight had more impact on EMG. Shoulder abduction and flexion movements higher than 60° occurred, particularly for the higher surface. Shoulder flexion was also higher when the box was moved to the low height. This study provides new evidence as shoulder postures during boxes handling on low surfaces had not previously been evaluated. Conclusions: The high demand of upper limb in manual material handling tasks is clear, particularly for the shoulder. This knowledge can be used by physical therapists to plan better rehabilitation programs for manual material handling-related disorders, particularly focusing on return to work.Keywords: biomechanics; environment design; weight lifting; cumulative trauma disorders; physical therapy. ResumoObjetivos: Avaliar o efeito da altura de superfície e massa da carga nos movimentos e na atividade eletromiográfica (EMG) dos membros superiores durante o manuseio de carga realizado por sujeitos experientes e inexperientes. Métodos: Dezesseis sujeitos experientes e 16 inexperientes manusearam uma caixa (7 e 15 kg) de uma superfície com altura intermediária para uma superfície alta e/ou baixa. Durante as tarefas, foram registradas imagens de vídeo e EMG. Os dados foram processados para obtenção dos percentis 10, 50 e 90 referentes à EMG dos músculos deltoide e bíceps e aos movimentos de flexão e abdução do ombro e flexão do cotovelo. Foram comparados os grupos, lados (direito/esquerdo), massas e altura de manuseio. Resultados: Não foram encontradas diferenças significantes entre os grupos ou lados. As variações de massa e altura de manuseio afetaram a EMG e postura, embora a massa da caixa tenha tido mais impacto sobre a EMG. Os movimentos de abdução e flexão do ombro ocorreram acima de 60°, particularmente no manuseio para a superfície alta. A amplitude de flexão de ombro também foi alta quando a caixa foi movida para a superfície baixa. Esse resultado consiste em uma nova evidência, já que posturas do ombro durante o manuseio de carga em superfícies baixas não tinham sido investigadas. Conclusões: A alta demanda do membro superior em tarefas de manuseio de carga é clara, particularmente do ombro. Esse conhecimento pode ser usado por fisioterapeutas para um melhor planejamento da r...

show abstract

“…De plus, la mobilité des pieds, caractérisée par un pivotement des pieds tout en maintenant la charge face au tronc, fut associée à une réduction des asymétries de posture et d'efforts au dos (Gagnon et al, 1993). Cependant, il est important de mentionner que même si le pivotement des pieds apparaît ici comme une stratégie efficace pour réduire les asymétries du dos, elle n'est en fait que rarement utilisée par les travailleurs (seulement 5 % des cas) et elle est presque entièrement observée pour des manutentions à partir de basses hauteurs (Authier et al, 1995a(Authier et al, , 1996 ; une faible utilisation s'explique probablement par le fait que cette stratégie est plus exigeante pour les membres inférieurs (Gagnon et al, 1995) et peut dépendre du type de surface de travail. Il est donc douteux que le potentiel de cette stratégie puisse être généralisé.…”

Section: Stratégies De Placement/déplacement Des Piedsunclassified

“…La comparaison de travailleurs experts et novices a révélé des différences très importantes, spécialement celles en relation avec les manoeuvres de boîtes (prises, pivotements, inclinaisons) et avec les placements/déplacements des pieds (orientation des pieds, types de pas) (Authier et al, 1995a(Authier et al, , 1996. Les experts favorisent des inclinaisons de boîte, souvent avec les mains en prises diagonales sur les coins ; ils anticipent la tâche en orientant leur bassin, leur pied de support et la charge vers la zone de dépôt ; ils se déplacent par petits pas en maintenant la boîte inclinée jusqu'au dépôt.…”

unclassified

Contribution des travailleurs dans l’élaboration des programmes d’entraînement à la manutention sécuritaire : identification des stratégies, évaluation biomécanique et implantation

Manual handling techniques: Comparing novices and experts

Cited by 99 publications

References 20 publications

Kinematic and electromyographic assessment of manual handling on a supermarket green- grocery shelf

Kinematic and electromyographic assessment of manual handling on a supermarket green- grocery shelf

How do low/high height and weight variation affect upper limb movements during manual material handling of industrial boxes?

Contribution des travailleurs dans l’élaboration des programmes d’entraînement à la manutention sécuritaire : identification des stratégies, évaluation biomécanique et implantation

Contact Info

Product

Resources

About