ESS - CEMAH - Comunicações em eventos científicos
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- The influence of job rotation on wrist position sense: a preliminary study among assembly workers in a real-life occupational settingPublication . Santos, Joana; Mesquita, Inês; Monteiro, Pedro; Santos, Rubim; Baptista, João Santos; Vaz, MárioThe effectiveness of job rotation in industrial environment is still controversial, namely during tasks with high functional similarity, as assembly tasks. Thus, the aim of this study was to investigate the influence of job rotation on wrist position sense acuity among experienced assembly workers. Eight healthy assembly workers divided in two groups (four assembly workers performed task rotation and four assembly workers performed tasks with no rotation) participated in this field study. Manifestations of muscle fatigue of wrist flexors and extensors muscles were obtained by surface electromyography during a standardized test contraction, while wrist position sense errors were assessed by electrogoniometry. After a workweek, d espite not statistically significant, wrist flexors muscles in the no rotation group showed EMG signs of fatigue. The two groups showed a trend to increase position error for flexion after a workweek. Future research should include a higher number of participants and other techniques to evaluate muscle fatigue and their impact on positon sense acuity.
- Manifestations of muscle fatigue during repetitive low-moderate intensity work: a brief reviewPublication . Santos, Joana; Monteiro, Pedro; Miguel, Alberto Sérgio; Santos, Rubim; Baptista, J. Santos; Vaz, MárioMuscle fatigue is a complex phenomenon that has been suggested to be an important precursor for work-related upperlimb musculoskeletal disorders. The assembly work is an example of low-moderate intensity work with elevated risk of muscle fatigue development. This review was performed to summarise and analyse the studies that investigated the influence of work requirements on muscle fatigue development in workplaces or experimental setting. This review was based on relevant articles published from 2000 to 2013 in the research platform Web of Knowledge. The studies included in this review were performed in humans and assess peripheral muscle fatigue in upper limbs during occupational activities. The search yielded 103 articles and 10 were included, according to inclusion criteria. Few studies were conducted in real work environment and the most common methods used to assess muscle fatigue were surface electromyography (EMG). The work duration and intensity level were the determinants of muscle fatigue that had more consistent results in terms of EMG- based parameters. In the studies that report subjective measurement of muscle fatigue, the subjective ratings increase. More research is needed to understand the impact of work requirements on muscle fatigue and work-related performance.
- Worker 4.0: A textile exoskeleton to support apparel industryPublication . Oliveira, João; Costa, Luani; Ramôa, Ana; Silva, Ricardo; Fertuzinhos, Aureliano; Estudante, Inês; Pinheiro, João; Vale, Bruno; Pilastri, André; Dias, Paula; Matta, Arthur; Sampaio, Rosane; Machado, Dário; Cortez, Paulo; Costa, Marta; Roças, Ana; Madureira, Pedro; Moreira, Juliana; Pereira, João Rui; Pereira, Carla; Bruno, FernandoSTVgoDigital project aims the transition of the textile and apparel industries to the new Industry 4.0 paradigm promoting the digitalization to increase productivity and efficiency of the entire value chain. Specifically, the PPS4 Worker 4.0 aims to develop an exoskeleton solution based on sensing and active components within a garment to support sewing operation movements that may cause injuries and/or pain in sewing machine workers. Seamstresses’ work requires physical efforts related to poor posture and repetitive tasks that increase the risk of developing musculoskeletal disorders. In a general context, in industrial environments have been implemented lower and upper limb devices empowered for human ergonomic improvement, due to the high prevalence of postural complaints and consequently pain. With this, much has been developed in the realm of exoskeletons and artificial muscles aimed at various situations. To achieve the objectives of developing an exoskeleton that integrates a sensing component that monitors workers’ movements in real-time, identifying its ergonomic posture, feeds the actuation component, and uses machine learning algorithms to predict future ergonomic risks in a wearable, light, and flexible garment to support the execution of movements inherent to some professional activities, this research was based on an ergonomic risk assessment and definition of performance parameters, the definition of the architecture system and the wearable garment, and in the construction of prototypes and analysis in a laboratory environment with seamstress’ volunteers.
- Influence of an exercise program in the peroneal reaction timePublication . Ferreira, A.; Monteiro, P.; Carvalho, Paulo; Moreira, CamiloSoccer is the most popular sport in the world and has characteristics which led to high incidence of injuries, which motivate FIFA to develop a program for injury prevention. The peroneal reaction time plays an important role in the prevention of the inversion movement in ankle injuries. This study’s main goal is to verify if such a program promotes changes in the peroneal reaction time. This is a quasi-experimental study with 14 athletes, distributed in two groups, experimental and control. The results show some significant changes in the peroneal reaction time, in response to the exercise program.
- Influence of two tapings on the reaction time of the peroneal musclesPublication . Ferreira, A.; Monteiro, P.; Carvalho, Paulo; Moreira, CamiloThis study aimed to investigate the influence of two different types of tapings on the reaction time of the peroneal muscles, using surface electromyography, in female volleyball athletes with sprain history and indicators of instability. A quasi-experimental study with a sample of 15 athletes was conducted. Adhesive elastic tapings heel-lock and kinesiotape, with peroneus and ligament application, were compared. For data analysis the parametric tests repeated measures ANOVA and T test for paired samples were used. The application of the kinesiotape reduced the reaction time of peroneal muscles significantly while the adhesive elastic band had no significative influence on it.
- Medidas de avaliação motora em indivíduos após AVC nas fases aguda e sub-aguda – scoping reviewPublication . Freitas, Marta; Pinho, Francisco; Pinho, Liliana; Figueira, Vânia; Silva, Sandra; Sousa, Andreia; Silva, AugustaAs alterações biomecânicas nos indivíduos após Acidente Vascular Cerebral (AVC) podem ser avaliadas em contexto clínico, com recurso a testes e escalas validadas, ou em contexto laboratorial através de uma análise instrumentada quantitativa e objetiva. Identificar e sumariar os instrumentos de avaliação, e respetivas tarefas motoras, utilizados na análise do movimento humano, nas fases aguda e subaguda recente, após AVC. Seguiu-se o protocolo PRISMA Extension for Scoping Reviews(PRISMA-ScR) e a estratégia “população”, “conceito” e “contexto” (PCC), para a definição da questão de pesquisa nas bases de dados PubMed®, Science Direct®, Web of Science®e Google Scholar®. Incluíram-se estudos publicados entre 2018 e 2022, em português e inglês, que descrevessem os instrumentos de avaliação clínicos e laboratoriais utilizados, e a tarefa motora associada, em indivíduos >19 anos, considerando até 3 meses após AVC. Excluíram-se artigos de revisão, estudos qualitativos, conference proceedings, cartas ao editor e editoriais. Foram selecionados 302 artigos, dos quais 15 foram elegíveis. A marcha (n=9), o sit to stand(n=2) e funções relacionadas com o membro superior(n=4) foram avaliadas por diferentes instrumentos clínicos (Functional Ambulation Categories; Functional Independence Measure; Fulgl-Meyer Assessment;) e laboratoriais (sistemas de captura de imagem (VICON, EXFH20, GoPro Hero5); plataformas de forças AMTI INc e AccuGait®). O Functional Ambulation Categoriese a Fulgl-Meyer Assessmentforam os instrumentos mais aplicados na análise clínica e o sistema de captura de imagem VICON na análise cinemática quantitativa. A tarefa motora mais estudada foi a marcha. Dada a evolução da tecnologia na procura de soluções viáveis para a tomada de decisão em contexto de reabilitação, sugerem-se estudos que privilegiam a avaliação em contexto real.
- Influência da exposição profissional a vibrações corpo inteiro no equilíbrio de manobradores de máquinas de terraplanagemPublication . Ferreira, Flávia; Vila-Chã, Carolina; Santos, Rubim; Santos, JoanaPostural instability due exposure to whole body vibrations (WBV) is very common among earthmoving machine operators. The aim of this study was to analyze the influence of occupational exposure to WBV in the postural stability. The study included two groups of healthy volunteers, which included six experienced earthmoving machine operators (exposed group) and five students recruited from an University (non exposed group). The standing balance was assessed by measuring the centre of pressure (CoP) displacement in a single-task (eyes-open/eyes-closed) during two experimental sessions at the beginning and at the end of the week. In general, the results showed that the standing balance of exposed group was worse than the non exposed group, in the CoP displacement in the medium-lateral direction, which may be due to the vibration input was, predominantly, in the y-axis. However, the results also demonstrated that exposed group developed body compensatory strategies associated to duration of exposure and years performing similar tasks. This evidence was an important contribute to further studies and to plan future ergonomic interventions related to work organization factors as work/rest schemes.
- Influência da exposição profissional a vibrações corpo inteiro na proprioceção em manobradores de máquinas de terraplanagemPublication . Domingues, Ana Raquel; Vila-Chã, Carolina; Santos, Rubim; Santos, JoanaOccupational exposure to whole body vibrations (WBV) has been identified as a risk factor for the development of low back injuries. Besides others negative health effects, WBV can cause proprioceptive deficits. Thus, the aim of this study was evaluate the impact of the WBV on trunk proprioception of earthmoving machines operators in an extractive industry. The study included twelve healthy subjects, seven experienced operators of earthmoving machinery and five recruited students from the university. Two experimental sessions at the beginning and at the end of the week were performed and trunk position sense absolute errors were assessed for all participants with the active movement reproduction test using a high speed camera (Casio EX-FC 100), for subsequent motion analysis with Kinovea 0.8.24 software. Data analysis demonstrated that the exposed group had higher absolute errors at the beginning and at the end of the week than non exposed group. These results suggest that vibration can alter sensory messages of the skin and muscles receptors and, consequently, change the sensation of the individual position. The implementation of postural reeducation strategies for workers exposed of WBV, can reduce the negative effects on proprioceptive ability.
- Pré-teste e validação de um procedimento para a análise de movimentos de reposicionamento da coluna lombarPublication . Ramos, Diana; Santos, Rubim; Rodrigues, MatildeMobile devices are becoming more common between young people, both for personal and school use. However, during the use of these equipment, they can adopt awkward postures for long periods, contributing for musculoskeletal disorders. The project “Mobile Devices, what risks?” intends to better characterize this problem. This study aims to test and validate a procedure to determine and analyse the repositioning movements of the lumbar spine during a sitting posture. For this analysis, two different systems were used: tri-axial accelerometers system; video recording. The study showed that both methods can be used to identify repositioning movements. However, better results for inter and intrareliability were found for the accelerometer system.
- Atividade do músculo solear nos dois membros inferiores em sujeitos com acidente vascular encefálico-sub-fase média de apoio da marchaPublication . Silva, Augusta; Santos, Rubim; Sousa, FilipaO objetivo da presente investigação foi estudar as diferenças de magnitude da atividade electromiográfica do músculo solear, durante a sub-fase média de apoio da marcha, entre os dois membros inferiores em indivíduos com acidente vascular encefálico. Foi constituída uma amostra, de forma não probabilística voluntária de cinco indivíduos com alterações neuro-motoras por AVE. O sinal electromiográfico foi recolhido e tratado pelo sistema Biopac MP 150 Worksation, e o software de apoio Acqknowledge® versão 3.9. foi utilizada uma Plataforma de forças e respectivo amplificador Bertec AM6300. Foi utilizada a versão adaptada para a população portuguesa da Fugl-Meyer AssessmentfsensorimotorRecoveryafterStroke. Para determinar o onset do sinal electromiográfico foi identificado o seu valor de atividade basal. O sinal da plataforma de forças foi normalizado ao peso e à velocidade da marcha dos sujeitos. Para a análise estatística das variáveis em estudo foi utilizado o software SPPS®. O intervalo de confiança utilizado foi de 95%, com um nível de significância de 0,05. Os resultados permitem-nos verificar uma tendência para uma diminuição da atividade electromiográfica do músculo solear no membro inferior menos comprometido. Não foram encontradas diferenças estatisticamente significativas para a atividade eletromiográfica do músculo solear entre os dois membros inferiores na sub-fase média de apoio da marcha nos sujeitos com AVE.