Effects of milking unit design on upper extremity muscle activity during attachment among U.S. large-herd parlor workers

Abstract

Milking unit design may influence muscle activity levels among parlor workers. Small reductions in muscle activity associated with milking unit design have the potential to delay the onset of fatigue or development of musculoskeletal health outcomes among parlor workers.

Full-shift and task-specific upper extremity muscle activity among US large-herd dairy parlour workers

“…Full technical details of the surface EMG processing and normalisation methods used in this study are available in Douphrate et al (2017). To summarise, raw surface EMG signals were recorded from the upper trapezius, anterior deltoid, biceps, flexor digitorum superficialis (forearm flexor) and extensor digitorum communis (forearm extensor).…”

“…as may occur if the skin-to-electrode interface were compromised) and electrocardiogram interference, and in the frequency domain for electromagnetic interference. (Douphrate et al 2017). All raw EMG signals were then (i) adjusted for DC offset, and (ii) converted to instantaneous root-mean-square (RMS) amplitude using a 100-sample RMS window with a 50-sample overlap (Fethke et al 2012).…”

“…Within the One Health framework, parlour milking involves multiple interactions between the worker, cow and working environment ( Figure 3). Many of these interactions could influence the health or performance of the worker (Douphrate et al 2017). The majority of dairy research conducted inside the milking parlour has emphasised cow health or milk production, while limited research has addressed the health of the parlour worker resulting from his/her interactions with the cow, equipment or working environment.…”

Proposta De Melhoria Ergonômica E Otimização Da Instalação Para a Atividade Leiteira Em Pequenas Propriedades Rurais

“…Ademais, a qualidade do desempenho da atividade de ordenha tem o potencial de influenciar na produtividade da sala de ordenha, na produção de leite e na saúde dos animais ordenhados. Ressalta-se ainda que uma rotina de ordenha inconsistente ou incorreta pode prolongar a descida do leite da vaca, aumentar o tempo de ordenha, afetando negativamente na saúde dos tetos dos animais e reduzindo o volume de extração do leite (DOUPHRATE et al, 2016b).…”

“…No processo de ordenha, também são verificados transtornos nos pulsos e nas mãos (KOLSTRUP, 2012), além de outros segmentos corporais, conforme o estudo de Douphrate et al (2016b), com alta prevalência de sintomas osteomusculares na extremidade superior, como na coluna vertebral e na região do ombro (OLIVEIRA et al, 2016;OLIVEIRA et al, 2017a).…”