Burnout em lideranças de enfermagem durante a pandemia da COVID-19 / Burnout in nursing leaderships during the COVID-19 pandemic / Burnout en líderes de enfermería durante la pandemia de COVID-19

Objetivo: analisar a relação entre o contexto de trabalho das lideranças de enfermagem na pandemia da COVID-19 e o Burnout. Método: estudo de método misto, com uma amostra quantitativa de 64 líderes de enfermagem, de todos os setores de quatro hospitais gaúchos. A coleta de dados ocorreu de agosto a outubro de 2020, após aprovação do Comitê Nacional de Ética em Pesquisa. Foi realizada a análise inferencial dos dados quantitativos (n=64), aplicados os testes de Mann-Whitney e correlações bivariadas de Spearman, considerando diferenças estatisticamente significativas "p" bicaudal menor que 0,05. Realizaram-se entrevistas qualitativas (n=12) acerca dos impactos da pandemia. Resultados: identificou-se 6,3% de prevalência de Síndrome de Burnout. Houve associação entre os domínios Desgaste Emocional e Despersonalização e as variáveis medo, aumento do consumo de álcool e impacto na saúde (p<0,05). Evidenciaram-se mudanças no contexto laboral, aumento do nível de exigência e da carga de trabalho e impactos na saúde. Conclusão: conclui-se que há associação entre o contexto de trabalho na pandemia e o Burnout. O aumento da sobrecarga de trabalho repercutiu em prejuízos na saúde mental(AU)

Objective: to analyze the relationship between the work context of nursing leaders in the COVID-19 pandemic and Burnout. Method: mixed method study, with a quantitative sample of 64 nursing leaders, from all sectors of four hospitals in Rio Grande do Sul. Data collection carried out from August to October 2020, after approval by the National Research Ethics Committee. Inferential analysis of quantitative data (n=64) was performed, applying Mann-Whitney tests and bivariate Spearman correlations, considering statistically significant two-tailed "p" differences less than 0.05. Qualitative interviews (n=12) were carried out about the impacts of the pandemic. Results: a 6.3% prevalence of Burnout Syndrome was identified. There was an association between the Emotional Exhaustion and Depersonalization domains and the variables fear, increased alcohol consumption and impact on health (p<0.05). There were changes in the work context, an increase in the level of demand and workload, and impacts on health. Conclusion: it is concluded that there is an association between the work context in the pandemic and Burnout. The increase in work overload had negative effects on mental health(AU)

Objetivo: analizar la relación entre el contexto de trabajo de los líderes de enfermería en la pandemia de COVID-19 y el Burnout. Método: estudio de método mixto, con muestra cuantitativa de 64 líderes de enfermería, de todos los sectores de cuatro hospitales de Rio Grande do Sul. La recolección de datos tuvo lugar de agosto a octubre de 2020, previa aprobación del Comité Nacional de Ética en Investigación. Se realizó el análisis inferencial de datos cuantitativos (n=64), se aplicaron pruebas de Mann-Whitney y correlaciones bivariadas de Spearman, considerando diferencias estadísticamente significativas "p" de dos colas menor a 0,05. Se realizaron entrevistas cualitativas (n=12) sobre los impactos de la pandemia. Resultados: se identificó una prevalencia del Síndrome de Burnout del 6,3%. Hubo asociación entre los dominios Cansancio Emocional y Despersonalización y las variables miedo, aumento del consumo de alcohol e impacto en la salud (p<0,05). Se han producido cambios en el contexto laboral, aumento en el nivel de exigencia y en la carga de trabajo e impactos en la salud. Conclusión: se concluye que existe asociación entre el contexto laboral en la pandemia y el Burnout. El aumento de la sobrecarga de trabajo tuvo efectos negativos sobre la salud mental(AU)

The effect of caffeine supplementation on exercise performance evaluated by a novel animal model

Introduction: Caffeinated drinks are used for improve performance. Animal models represent investigational strategy that circumvents most of the drawbacks of research in humans, including motivational factors and the placebo effect. No animal model that could test whether different forms of administering caffeine affect exercise propensity was found in the literature. Methods: An animal model of grouped voluntary exercise was tested. Two-month-old male C57/bl mice were housed in a cage fitted with one running wheel and a monitoring system. Six animals per cage were introduced individually. To assess the sensitivity of the model, the effect of different caffeinated drinks was observed in mice exercising ad libitum. During 2 days, the mice received: 1) pure anhydrous caffeine 0.125 mg/mL (PC), 2) cola drink (CC), and 3) caffeine-taurine-glucuronolactone drink (CTG), intercalating wash-out periods of 2 days, receiving pure water. Results: The distance run during the periods of water ingestion was significantly lower than during the periods of stimulant drinks ingestion: PC (5.6 ± 1.3 km; p = 0.02), of CC ingestion (7.6 ± 0.6 km; p = 0.001), and of CTG ingestion (8.3 ± 1.6 km; p = 0.009). The performances when ingesting the three caffeinated drinks do not follow a dose-response curve. Conclusions: The model described here was able to measure the effect of caffeine intake on voluntary exercise of mice. The sensitivity of the model to the effect of caffeine needs to be further validated. The action of each component of the drinks on exercise performance needs to be clarified in future research. The present model is adequate for such investigation (AU)