Browsing by Issue Date, starting with "2021"
Now showing 1 - 10 of 230
Results Per Page
Sort Options
- Telework and Work–Family Conflict during COVID-19 Lockdown in Portugal: The Influence of Job-Related FactorsPublication . Andrade, Cláudia; Petiz Lousã, EvaEven though research has been showing that telework, under regular circumstances, could benefit the integration of work and family life, mandatory telework during the COVID-19 lockdown brought additional challenges, with potential to create conflicts between work and family spheres. Using regression analysis, this study examined the contribution of demographic and job-related variables to the prediction of work–family conflict among a sample of 213 workers who were involved in mandatory telework during the first lockdown due to the COVID-19 pandemic. The results revealed that role overload, after-hours work-related technology use, and low job autonomy accounted for the prediction of work–family conflict. Support from the supervisors and coworkers did not have an impact in easing the perception of work–family conflict but presented a moderation effect between after-hours work-related technology use and work–family conflict. Implications of the study for management practices related to telework, limitations of the study, and directions for future research are discussed.
- Muscle-Bone Crosstalk in Chronic Kidney Disease: The Potential Modulatory Effects of ExercisePublication . Leal, Diogo V.; Ferreira, Aníbal; Watson, Emma L.; Wilund, Kenneth R.; Viana, João L.Chronic kidney disease (CKD) is a prevalent worldwide public burden that increasingly compromises overall health as the disease progresses. Two of the most negatively affected tissues are bone and skeletal muscle, with CKD negatively impacting their structure, function and activity, impairing the quality of life of these patients and contributing to morbidity and mortality. Whereas skeletal health in this population has conventionally been associated with bone and mineral disorders, sarcopenia has been observed to impact skeletal muscle health in CKD. Indeed, bone and muscle tissues are linked anatomically and physiologically, and together regulate functional and metabolic mechanisms. With the initial crosstalk between the skeleton and muscle proposed to explain bone formation through muscle contraction, it is now understood that this communication occurs through the interaction of myokines and osteokines, with the skeletal muscle secretome playing a pivotal role in the regulation of bone activity. Regular exercise has been reported to be beneficial to overall health. Also, the positive regulatory effect that exercise has been proposed to have on bone and muscle anatomical, functional, and metabolic activity has led to the proposal of regular physical exercise as a therapeutic strategy for muscle and bone-related disorders. The detection of bone- and muscle-derived cytokine secretion following physical exercise has strengthened the idea of a cross communication between these organs. Hence, this review presents an overview of the impact of CKD in bone and skeletal muscle, and narrates how these tissues intrinsically communicate with each other, with focus on the potential effect of exercise in the modulation of this intercommunication.
- Accelerated decline in quadriceps area and Timed Up and Go test performance are associated with hip fracture risk in older adults with impaired kidney functionPublication . Marques, Elisa A.; Elbejjani, Martine; Viana, João L.; Gudnason, Vilmundur; Sigurdsson, Gunnar; Lang, Thomas; Sigurdsson, Sigurdur; Aspelund, Thor; Siggeirsdottir, Kristin; Launer, Lenore; Eiriksdottir, Gudny; Harris, Tamara B.This study aimed to examine whether an accelerated decline in quadriceps cross-sectional area (CSA), attenuation (a surrogate of quality), and strength, as well as lower limb muscular function, are associated with hip fractures in older adults with impaired kidney function.
- Effects of Normobaric Hypoxia on Matched-severe Exercise and Power-duration RelationshipPublication . Sousa, Ana Catarina; Millet, Gregoire P.; Viana, João; Milheiro, Jaime; Reis, VítorWe investigated the effects of hypoxia on matched-severe intensity exercise and on the parameters of the power-duration relationship. Fifteen trained subjects performed in both normoxia and normobaric hypoxia (FiO2=0.13, ~3000 m) a maximal incremental test, a 3 min all-out test (3AOT) and a transition from rest to an exercise performed to exhaustion (Tlim) at the same relative intensity (80%∆). Respiratory and pulmonary gas-exchange variables were continuously measured (K5, Cosmed, Italy). Tlim test's V̇O2 kinetics was calculated using a two-component exponential model. V̇O2max (44.1±5.1 vs. 58.7±6.4 ml.kg-1.min-1, p<0.001) was decreased in hypoxia. In Tlim, time-to-exhaustion sustained was similar (454±130 vs. 484±169 s) despite that V̇O2 kinetics was slower (τ1: 31.1±5.8 vs. 21.6±4.7 s, p<0.001) and the amplitude of the V̇O2 slow component lower (12.4±5.4 vs. 20.2±5.7 ml.kg-1.min-1, p<0.05) in hypoxia. CP was reduced (225±35 vs. 270±49 W, p<0.001) but W' was unchanged (11.3±2.9 vs. 11.4±2.7 kJ) in hypoxia. The changes in CP/V̇O2max were positively correlated with changes in W' (r = 0.58, p<0.05). The lower oxygen availability had an impact on aerobic related physiological parameters, but exercise tolerance is similar between hypoxia and normoxia when the relative intensity is matched despite a slower V̇O2 kinetics in hypoxia.
- Estudo de Caso em Empresa de Construção Civil: Proposta de Modelos de Descrição e Análise de Funções e de Avaliação de DesempenhoPublication . Silva, Marta SofiaEste projeto consiste num estudo de caso de uma pequena e média empresa (PME) que presta serviços de construção civil, com o objetivo de ajudar a sustentabilidade da mesma na temática dos recursos humanos (RH), podendo a partir daqui criar-se planos de carreiras, sistemas de retribuição e de incentivos, procedimentos de recrutamento, entre outros. Desta forma, propõe-se a elaboração de um modelo de Avaliação de Desempenho, bem como de um sistema de Descrição e Análise de Funções, voltados para micro e pequenas empresas de forma simples e clara e que possam servir como um ponto de partida para a empresa desenvolver (novas) práticas de RH. É fundamental considerar que o sucesso alcançado pelas organizações depende do potencial dos colaboradores e respetivas práticas de Recursos Humanos.
- Das Grandes OportunidadesPublication . Oliveira, J.C.
- Expectativas de Carreira e Valores de Trabalho dos Millennials no setor das Tecnologias de InformaçãoPublication . Leal, Rui JorgeO objetivo central desta investigação consiste em compreender as expectativas de carreira e os valores de trabalho da geração Millennial e, com base nesses resultados, discutir possíveis estratégias de gestão de pessoas que se ajustem aos estilos de trabalho e expectativas destes profissionais, de modo a atrair, motivar e reter os melhores “talentos” desta geração. Este estudo utilizou uma metodologia quantitativa com a aplicação de três instrumentos: o Questionário Sociodemográfico, o Questionário sobre as Expectativas em relação à Carreira Profissional e o Questionário sobre os Valores associados ao Trabalho.
- Quo vadis Esports? Onde vão estar os Esports em Portugal em 2025?Publication . Cardoso, Eduardo ManuelO principal objeto de estudo da presente investigação é perceber como é que estará o mercado português de Esports em 2025 e como é que podemos trabalhar para que o mesmo continue a crescer. Utilizou-se uma metodologia qualitativa e o plano de pesquisa utilizado foi o método de Delphi através da realização de entrevistas a vários agentes ligados aos Esports nacionais. Para a recolha de dados primários, privilegiou-se o uso de entrevistas semi-estruturadas. Na análise de dados, foi utilizada a análise temática e o programa NVivo para tratar todos os dados relacionados com o estudo
- O "Oxigénio" das OrganizaçõesPublication . Oliveira, J.C.
- Que Liderança pode ser Transformadora?Publication . Oliveira, J.C.