386 research outputs found

    Associação entre tempo de treinamento físico sobre o IMC, qualidade de vida e flexibilidade em adultas praticantes de ginástica aeróbica

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    A prática de exercício físico está ligada a melhora da saúde corporal e mental. A ginástica aeróbica é um modelo de atividade física muito utilizado entre mulheres adultas, entretanto pouco se o tempo desta prática está relacionada com a flexibilidade e qualidade de vida neste público. O objetivo desta pesquisa foi verificar a associação entre o tempo de treinamento, IMC, qualidade de vida e níveis de flexibilidade em praticantes de ginástica aeróbica. Trata-se de um estudo transversal, descritivo e com abordagem quantitativa, realizado entre o período de setembro e novembro de 2019. A amostra foi composta por 50 mulheres praticantes de ginástica aeróbica há pelo menos três meses, divididas em dois grupos: G1 (praticantes de ginástica há menos de 12 meses) e G2 (praticantes de ginástica há mais de 12 meses). Todos os participantes responderam a um questionário sociodemográfico, questionário de qualidade de vida (SF-36), foram avaliados em antropometria e no teste de flexibilidade de sentar e alcançar. A média de idade de 39,7 ± 10,6 anos, peso de 64,5 ± 9,3 kg e uma estatura de 1,60 ± 0,1 cm e o índice de massa corporal 26,2 ± 3,3 kg/m2. O G2 apresentou pontuações maiores no questionário de qualidade de vida SF-36, nos domínios: função física, dor, limitação de papel físico, limitação de papel mental e vitalidade energética. Quanto ao teste de flexibilidade, cerca de 78% do G1 apresentou uma classificação ruim. Mais da metade do G2 (67%) também apresentou uma classificação ruim. Classificações excelentes e na média totalizou 9% no G1 e 15% no G2. Conclui-se que adultas praticantes a mais 12 meses de ginástica aeróbica apresentam melhores índices de qualidade de vida e de flexibilidade, quando comparada com adultas com menor tempo de experiência nesta modalidade de atividade física

    MURO DE CONCRETO, TETO DE VIDRO E LABIRINTO: Metáforas que Revelam a Trajetória de Executivas Brasileiras em Cargos de Liderança

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    O objetivo deste artigo é utilizar metáforas para entender a trajetória de executivas brasileiras no mercado de trabalho. Foram pesquisadas três metáforas que representam obstáculos que dificultam ou excluem mulheres de cargos de liderança: Muro de Concreto, Teto de Vidro e Labirinto de Barreiras. A partir dos conceitos apresentados por Eagly e Carli (2007), Hymowitz e Schellhardt (1986), e Dohadwala (2012), elaborou-se um roteiro para entrevistas em profundidade com seis executivas. Os principais obstáculos que essas mulheres enfrentam são as responsabilidades familiares, a discriminação no ambiente de trabalho e a falta de mentoria em suas carreiras. Conclui-se que, no contexto brasileiro junto às entrevistadas, apesar de existir um Labirinto na ascensão de mulheres a cargos de liderança, essa metáfora foi pouco percebida por elas. Dessa forma, os resultados da pesquisa sugerem a junção do conceito Labirinto de Barreiras com Teto de Vidro, denominando a metáfora de Labirinto de Vidro

    Doxorubicin cardiotoxicity and Camellia sinensis cardioprotection determined by speckle-tracking echocardiography

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    Doxorubicin (Dox) is a medication used in the treatment of cancerous tumors and hematologic malignancies with potentially serious side effects, including the risk of cardiotoxicity. Flavonoids are plant metabolites with antioxidant properties and can be extracted from Camellia sinensis (CS). The aim of this study is to evaluate the possible cardioprotective effect of CS against injuries induced by Dox in rats. A total of 32 animals were distributed into four groups: (1) control - intraperitoneal injection (I.P.) of 0.5 mL saline weekly and 1.0 mL water by gavage daily; (2) CS - 0.5 mL saline I.P. weekly and 200 mg/kg CS by gavage daily; (3) Dox - 5.0 mg/kg Dox I.P. weekly and 1.0 mL water by gavage daily; and (4) Dox+CS -5.0 mg/kg Dox I.P. weekly and 200 mg/kg CS by gavage daily. Clinical examinations, blood profiles, electrocardiograms, echocardiograms, and histological analyses of hearts were performed over 25 days. The animals in the Dox group showed changes in body weight and in erythrogram, leukogram, electrocardiography, and echocardiography readings. However, animals from the dox+CS group had significantly less change in body weight, improved cardiac function, and showed more preserved cardiac tissue. This study demonstrated that CS prevents dox-induced cardiotoxicity, despite enhancing the cytotoxic effect on blood cells

    Sex Differences in Maximal Oxygen Uptake Adjusted for Skeletal Muscle Mass in Amateur Endurance Athletes: A Cross Sectional Study

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    Male athletes tend to outperform female athletes in several endurance sports. Maximum cardiac output can be estimated by maximal oxygen consumption (V˙O2max), and it has been established that men present V˙O2max values about 20% higher than women. Although sex differences in V˙O2max have already been well studied, few studies have assessed sex differences with regard to muscle oxidative capacity. The aim of this study was to compare aerobic muscle quality, accessed by V˙O2max and adjusted by lower limb lean mass, between male and female amateur triathletes. The study also aimed to compare sex differences according to V˙O2 submaximal values assessed at ventilatory thresholds. A total of 57 participants (23 women and 34 men), who had been training for Olympic-distance triathlon races, underwent body composition evaluation by dual-energy X-ray absorptiometry and performed a cardiorespiratory maximal test on a treadmill. Male athletes had significantly higher V˙O2max, both absolutely and when adjusted to body mass. Conversely, when V˙O2max was adjusted for lean mass, there was no significant difference between sexes. The same was observed at submaximal exercise intensities. In conclusion, differences in V˙O2max adjusted to body mass but not lean mass may explain, at least in part, sex differences in performance in triathlons, marathons, cycling, and other endurance sports

    "Impact of aging on maximal oxygen uptake adjusted for lower limb lean mass, total body mass, and absolute values in runners"

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    Performance in endurance sports decreases with aging, which has been primarily attributed to cardiovascular and musculoskeletal aging; however, there is still no clear information on the factors that are most affected by aging. The aim of this study was to compare two groups of runners ( 50 years of age) according to their absolute, weight-adjusted maximal oxygen uptake (V̇O2_{2}max), lower limb lean mass-adjusted V̇O2_{2}max, ventilatory threshold, and respiratory compensation point (RCP). A total of 78 male recreational long-distance runners were divided into Group 1 (38.12 ± 6.87 years) and Group 2 (57.55 ± 6.14 years). Participants were evaluated for body composition, V̇O2_{2}max, VT, and RCP. Group 1 showed higher absolute and body mass-adjusted V̇O2_{2}max (4.60 ± 0.57 l·min−1^{-1} and 61.95 ± 8.25 ml·kg−1^{-1}·min−1^{-1}, respectively) than Group 2 (3.77 ± 0.56 l·min−1^{-1} and 51.50 ± 10.22 ml·kg−1^{-1}·min−1^{-1}, respectively), indicating a significant difference (p < 0.001, d =  - 1.46 and p < 0.001, d =  - 1.16). Correspondingly, Group 1 showed a significantly higher lower limb lean mass-adjusted V̇O2_{2}max (251.72 ± 29.60 ml·kgLM−1^{-1}·min−1^{-1}) than Group 2 (226.36 ± 43.94 ml·kgLM−1^{-1}·min−1^{-1}) (p = 0.008, d =  - 0.71). VT (%V̇O2_{2}max) (p = 0.19, d = 0.19) and RCP (%V̇O2_{2}max) (p = 0.24, d = 0.22) did not differ between the groups. These findings suggest that both variables that are limited by central or peripheral conditions are negatively affected by aging, but the magnitude of the effect is higher in variables limited by central conditions. These results contribute to our understanding of how aging affects master runners

    Curso Pré-Vestibular Popular Liberato e Por Dentro da UFRGS: A demanda da comunidade para a transformação social através da educação popular

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    O Por Dentro da UFRGS (PDU) é um programa de extensão do Departamento de Educação e Desenvolvimento Social (DEDS) da Pró-Reitoria de Extensão (PROREXT) da UFRGS que nasceu em 2017, a partir da necessidade de atuar nas ações afirmativas com capacitações para o público interno e externo da Universidade, visitas em escolas, espaços educativos e culturais em Porto Alegre e criação do Curso Pré-Vestibular Popular Liberato (CPVPL)

    Peer review report for: A woman's place is… in politics: Reflections about micro and macroaggressions of identities

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    PEER REVIEW REPORT FOR: Fernandes, C., & Lourenço, M. L. (2023). A woman’s place is… in politics: Reflections about micro and macroaggressions of identities. Revista de Administração Contemporânea, 27(5), e220252. https://doi.org/10.1590/1982-7849rac2023220252.en HOW TO CITE THIS PEER REVIEW REPORT: Gomes, M. N., Souza, M. D., Sanchez, B. R., Fernandes, C., & Lourenço, M. L. (2023). Peer review report for: A woman’s place is… in politics: Reflections about micro and macroaggressions of identities. RAC. Revista de Administração Contemporânea. Zenodo. https://doi.org/10.5281/zenodo.8351807 REVIEWERS: Maíra Neiva Gomes (Universidade do Estado de Minas Gerais, Brazil) Marilia Duarte de Souza (Universidade Federal de Minas Gerais, Brazil) Beatriz Rodrigues Sanchez (Centro Brasileiro de Análise e Planejamento, Brazil

    Running economy in long-distance runners is positively affected by running experience and negatively by aging

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    Introduction: The maximum oxygen uptake (V˙O2max), the maximum rate of oxygen that can be sustained before the onset of blood lactate accumulation, and the metabolic cost of locomotion are the main physiological factors associated with long-distance running performance. The latter is known as the running economy. Generally, runners reach peak performance in long races between 25 and 30 years of age, with a progressive decline occurring thereafter. However, it is not known whether the running economy is affected or how it is affected by aging. Aim: To investigate the effect of age and years of running experience on the running economy of amateur long-distance runners aged 20-80 years. Methods: Sixty-nine recreational long-distance runners, divided into five age groups according to decade of life, participated in this study: Group 1 (n= 9) 27.2 ± 1.3 years, Group 2 (n= 18) 35.9 ± 2.2 years, Group 3 (n= 17) 43.4 ± 2.8 years, Group 4 (n= 17) 53.0 ± 2.3 years, and Group 5 (n= 8) 65.5 ± 2.9 years. For running economy assessment, oxygen cost (OC) and energy cost (EC) were measured. Furthermore, the participants were interviewed on their running experience. Results: For EC, the two independent variables composing the regression model were age (ß = 0.703, t= 5.443, p < 0.001) and running experience (ß = -0.230, t = -1.785, p= 0.07), and 34% of the energy cost variation can be explained by these two factors. EC and OC were compared among the groups. There were no significant differences between Groups 1 and 2 (p= 0.999), Groups 1 and 3 (p= 1.000), and Groups 1 and 4 (p= 0.528). However, Group 5 had a significantly higher energy cost than Group 1 (p < 0.001), Group 2 (p < 0.001), Group 3 (p < 0.001) and Group 4 (p < 0.001). Conclusion: The number of years of running experience has a positive effect on running economy, but it is insufficient to overcome the negative effect of the aging process. Furthermore, running economy was significantly worse in participants aged ≥60 years compared with that in younger athletes. Keywords: Aging; Performance; Running economy; Running experience

    Ambulatory and hospitalized patients with suspected and confirmed mpox: an observational cohort study from BrazilResearch in context

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    Summary: Background: By October 30, 2022, 76,871 cases of mpox were reported worldwide, with 20,614 cases in Latin America. This study reports characteristics of a case series of suspected and confirmed mpox cases at a referral infectious diseases center in Rio de Janeiro, Brazil. Methods: This was a single-center, prospective, observational cohort study that enrolled all patients with suspected mpox between June 12 and August 19, 2022. Mpox was confirmed by a PCR test. We compared characteristics of confirmed and non-confirmed cases, and among confirmed cases according to HIV status using distribution tests. Kernel estimation was used for exploratory spatial analysis. Findings: Of 342 individuals with suspected mpox, 208 (60.8%) were confirmed cases. Compared to non-confirmed cases, confirmed cases were more frequent among individuals aged 30–39 years, cisgender men (96.2% vs. 66.4%; p < 0.0001), reporting recent sexual intercourse (95.0% vs. 69.4%; p < 0.0001) and using PrEP (31.6% vs. 10.1%; p < 0.0001). HIV (53.2% vs. 20.2%; p < 0.0001), HCV (9.8% vs. 1.1%; p = 0.0046), syphilis (21.2% vs. 16.3%; p = 0.43) and other STIs (33.0% vs. 21.6%; p = 0.042) were more frequent among confirmed mpox cases. Confirmed cases presented more genital (77.3% vs. 39.8%; p < 0.0001) and anal lesions (33.1% vs. 11.5%; p < 0.0001), proctitis (37.1% vs. 13.3%; p < 0.0001) and systemic signs and symptoms (83.2% vs. 64.5%; p = 0.0003) than non-confirmed cases. Compared to confirmed mpox HIV-negative, HIV-positive individuals were older, had more HCV coinfection (15.2% vs. 3.7%; p = 0.011), anal lesions (45.7% vs. 20.5%; p < 0.001) and clinical features of proctitis (45.2% vs. 29.3%; p = 0.058). Interpretation: Mpox transmission in Rio de Janeiro, Brazil, rapidly evolved into a local epidemic, with sexual contact playing a crucial role in its dynamics and high rates of coinfections with other STI. Preventive measures must address stigma and social vulnerabilities. Funding: Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz (INI-Fiocruz)
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