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Impacto da carga física e da rotação de tarefas na perceção de esforço, força de preensão e dor
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Este estudo apresentou como principal objetivo, verificar a influência da carga física de trabalho na percepção subjetiva de esforço, na força de preensão e na dor músculo-esquelética em dois grupos de trabalhadores de uma instalação de armazenagem e enchimento de garrafas de GPL. Além disto, a investigação também pretende, no grupo sujeito a carga física, verificar o impacto que a rotação de posto de trabalho tem na perceção de esforço, força de preensão e presença de dor. Amostra foi constituída por 49 participantes. Esta foi inicialmente dividida em dois grupos, um grupo com carga física no trabalho (n=28) e outro sem carga física (n=21). Posteriormente no grupo com carga foram analisados dois subgrupos, um com rotação de posto de trabalho (n=17) e outro sem rotação (n=11). Foram utilizados, para avaliar, o questionário sociodemográfico, a escala de Borg, o questionário nórdico músculo-esquelético (NMQ) e o dinamómetro de Jamar. A análise de dados foi realizada com o software Statistical Package for the Social Sciences, versão 29.
A análise comparativa entre grupos revelou um resultado estatisticamente significativo (p-value = 0,03) em relação à dor no punho nos últimos 7 dias, tendo uma maior presença no grupo com carga. No grupo sujeito a carga, foi ainda encontrada uma associação estatisticamente significativa entre a escala de Borg e a variação da força de preensão (r=-0,43, p=0,02), assim como entre a escala de Borg e a presença de dor no ombro nos últimos 12 meses (r=-0,45, p=0,02). Por fim, na comparação entre os subgrupos (com e sem rotação) obteve-se um resultado estatisticamente significativo (p-value = 0,01) na escala de Borg, onde o grupo sem rotação apresentou maior fadiga. No final verificou-se que a exposição a carga física diária está associada ao aumento da fadiga e diminuição da força ao longo do dia e à presença de dor. Observou-se ainda que a rotação de posto de trabalho contribui para a redução da perceção de esforço e consequente presença de fadiga.
The main objective of this study was to verify the influence of physical workload on the subjective perception of effort, grip strength and musculoskeletal pain in two groups of workers at an LPG bottle storage and filling facility. In addition, the research also intends, in the group subject to physical load, to verify the impact that job rotation has on the perception of effort, grip strength and the presence of pain. The sample consisted of 49 participants. This was initially divided into two groups, one group with physical workload (n=28) and the other without physical workload (n=21). Subsequently, in the group with load, two subgroups were analyzed, one with job rotation (n=17) and the other without rotation (n=11). The sociodemographic questionnaire, the Borg scale, the Nordic musculoskeletal questionnaire (NMQ) and the Jamar dynamometer were used to evaluate. Data analysis was performed using the Statistical Package for the Social Sciences software, version 29. The comparative analysis between groups revealed a statistically significant result (p-value = 0.03) in relation to wrist pain in the last 7 days, with a greater presence in the group with load. In the load-bearing group, a statistically significant association was also found between the Borg scale and the variation in grip strength (r=-0.43, p=0.02), as well as between the Borg scale and the presence of shoulder pain in the last 12 months (r=-0.45, p=0.02). Finally, in the comparison between the subgroups (with and without rotation), a statistically significant result (p-value = 0.01) was obtained on the Borg scale, where the group without rotation presented greater fatigue. In the end, it was found that exposure to daily physical load is associated with increased fatigue and decreased strength throughout the day and the presence of pain. It was also observed that job rotation contributes to the reduction of the perception of effort and consequent presence of fatigue.
The main objective of this study was to verify the influence of physical workload on the subjective perception of effort, grip strength and musculoskeletal pain in two groups of workers at an LPG bottle storage and filling facility. In addition, the research also intends, in the group subject to physical load, to verify the impact that job rotation has on the perception of effort, grip strength and the presence of pain. The sample consisted of 49 participants. This was initially divided into two groups, one group with physical workload (n=28) and the other without physical workload (n=21). Subsequently, in the group with load, two subgroups were analyzed, one with job rotation (n=17) and the other without rotation (n=11). The sociodemographic questionnaire, the Borg scale, the Nordic musculoskeletal questionnaire (NMQ) and the Jamar dynamometer were used to evaluate. Data analysis was performed using the Statistical Package for the Social Sciences software, version 29. The comparative analysis between groups revealed a statistically significant result (p-value = 0.03) in relation to wrist pain in the last 7 days, with a greater presence in the group with load. In the load-bearing group, a statistically significant association was also found between the Borg scale and the variation in grip strength (r=-0.43, p=0.02), as well as between the Borg scale and the presence of shoulder pain in the last 12 months (r=-0.45, p=0.02). Finally, in the comparison between the subgroups (with and without rotation), a statistically significant result (p-value = 0.01) was obtained on the Borg scale, where the group without rotation presented greater fatigue. In the end, it was found that exposure to daily physical load is associated with increased fatigue and decreased strength throughout the day and the presence of pain. It was also observed that job rotation contributes to the reduction of the perception of effort and consequent presence of fatigue.
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Carga física Fadiga Dor Músculo-esquelética Força preensão Rotação posto trabalho