FORCE AND MUSCULAR ACTIVITY DURING PULLING ACTIVITY WITH AND WITHOUT USING A CART
FORÇA E ATIVIDADE MUSCULAR DURANTE A ATIVIDADE DE TRAÇÃO COM E SEM O USO DE UM CARRINHO
FUERZA Y ACTIVIDAD MUSCULAR DURANTE ACTIVIDAD DE TRACCIÓN CON Y SIN USO DE UN COCHECIT
Nívia Cecília Kruta de Araújo, Catarina de Oliveira Sousa, Tatiana de Oliveira Sato
Abstract
Recyclable material collectors perform manual material handling activities using nylon bags. In cooperatives, these bags are dragged on the floor; however, this activity has been replaced by carts to facilitate activity, improve logistics, increase the useful life of bags and reduce musculoskeletal complaints. However, there is no evidence that the use of carts can bring benefits to this activity. Thus, we compared the traction force and the muscular activity of the upper limb during manual handling with and without the aid of a cart. Fifteen workers pulled bags with plastic (20 kg), cardboard (30 kg) and aluminum (40 kg), with and without the use of a cart. The traction force was greater when the bag was handled manually and increased according to the bag's mass; no differences were found between the masses with the use of the cart. Muscle activity was greater for the cart and with a tendency to increase activation as the mass increases. Thus, we noticed that the use of the cart reduced the traction force and increased the activation of the muscles of the upper limbs.
Keywords
Resumo
Coletores de materiais recicláveis realizam atividades manuais de manuseio de materiais usando sacolas de nylon. Em cooperativas, essas sacolas são arrastadas no chão; no entanto, essa atividade foi substituída por carrinhos para facilitar a atividade, melhorar a logística, aumentar a vida útil das sacolas e reduzir queixas musculoesqueléticas. No entanto, não há evidências de que o uso de carrinhos possa trazer benefícios a essa atividade. Assim, comparamos a força de tração e a atividade muscular do membro superior durante o manuseio manual com e sem o auxílio de um carrinho. Quinze trabalhadores puxaram sacolas com plástico (20 kg), papelão (30 kg) e alumínio (40 kg), com e sem o uso de um carrinho. A força de tração foi maior quando a sacola foi manipulada manualmente e aumentou de acordo com a massa da sacola; não foram encontradas diferenças entre as massas com o uso do carrinho. A atividade muscular foi maior para o carrinho e com uma tendência a aumentar a ativação à medida que a massa aumenta. Assim, observamos que o uso do carrinho reduziu a força de tração e aumentou a ativação dos músculos dos membros superiores.
DOI da Versão Traduzida: https://doi.org/10.4322/rae.v15e202106.pt
Palavras-chave
Resumen
Los recolectores de materiales reciclables realizan actividades de manipulación manual de materiales utilizando bolsas de nailon. En las cooperativas, estas bolsas son arrastradas por el suelo; sin embargo, esta actividad fue reemplazado por carros para facilitar la actividad, mejorar Logística, aumentar la vida útil. de bolsas y reducir las molestias musculoesqueléticas. Sin embargo, no hay evidencia de que el uso de carritos pueda aportar beneficios a esta actividad. Así, comparamos la fuerza de tracción y la actividad muscular del miembro superior durante el manejo manual con y sin ayuda de un carro. Quince trabajadores sacaron bolsas que contenían plástico (20 kg), cartón (30 kg) y aluminio (40 kg), con y sin el uso de un carro. La fuerza de tracción fue mayor cuando la bolsa se manipuló manualmente y aumentó según la masa de la bolsa; no se encontraron diferencias entre las masas con el uso del carrito. actividad muscular era mas grande al carrito y con uno tendencia a aumentar el activación a medida qué el masa aumenta. Así, observamos qué El uso del carro redujo la fuerza de tracción y aumentó la activación de los músculos de las extremidades superiores.
DOI de la versión traducida: https://doi.org/10.4322/rae.v15e202106.es
Palabras clave
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