Análise biomecânica da área lombar usando eletromiografia de superfície: Relação flexão-relaxamento em trabalhadores de manutenção
DOI:
https://doi.org/10.17533/udea.rfnsp.e356473Palavras-chave:
dor lombar, região lombar, saúde ocupacional, eletromiografia de superfície, fenômenos biomecânicosResumo
Objetivo: Este estudo analisou a presença e a ausência de silêncio eletromiográfico durante a fase de retenção da flexão-relaxamento do tronco.
Metodologia: A atividade elétrica de dois músculos das costas (ou seja, longissimus e multifidus) de 10 trabalhadores do sexo masculino do setor de manutenção, todos com menos de 65 anos, foi registrada quando eles realizaram uma flexão anterior do tronco sem carga por 15 segundos. O risco de sofrer de dor lombar foi avaliado com base nos índices de flexão-relaxamento calculados
Resultados: Na amostra, os FRRs médios dos músculos longissimus e multifidus foram 6,47 ± 4,21 e 7,99 ± 4,71, respectivamente. Além disso, 20% dos indivíduos apresentaram valores abaixo de 2,98 no longissimus e 40%, valores abaixo de 7,21 no multifidus, o que indica ausência de silêncios e possível dor. A velocidade média de flexão foi de 103,67 ± 15,56°/s; a velocidade média de relaxamento, de 98,968 ± 19,11°/s; e o ângulo médio de flexão, de 106,94 ± 12,60°
Conclusão: Os resultados deste estudo demonstram que, a longo prazo, os trabalhadores de manutenção e serviços gerais podem sofrer de desconforto ou dor lombar crônica como consequência de suas tarefas diárias
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