Navegando por Autor "Leitão, José Carlos"
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Artigo Can people self-select an exercise intensity sufficient to enhance muscular strength during weight training? A systematic review protocol of intervention studies(Medicine, 2019) Piuvezam, Grasiela; Segundo, Victor Hugo de Oliveira; Azevedo, Kesley Pablo Morais de; Medeiros, Humberto Jefferson de; Leitão, José Carlos; Knackfuss, Maria Irany; https://orcid.org/0000-0002-2343-7251Background: Previous studies have reported that self-selection of the training intensity can be an interesting strategy to improve adherence in aerobic exercise programs. However, its effectiveness with weight training has not been systematically reviewed and remains unclear. In this study, we will describe a systematic review protocol that aims to investigate if people are able to self-select an intensity during weight training sufficient to enhance muscular strength. Methods: This protocol is guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols. In this study, we will search the following electronic databases: PubMed, Science Direct, Scopus, Web of Science and SPORTDiscus. Intervention studies with at least one weight training session performed at self-selected intensity, with people from both genders and all age ranges will be included. The Downs & Black checklist will be used for methodological quality assessment. Two experienced reviewers will independently perform the selection of studies, data extraction, and evaluation of the methodological quality. Conclusion: This will be the first systematic review describing the results of weight training intervention studies with self-selected intensity. This study will provide high-quality and reliable evidence for health professionals and may direct methodological recommendations for further studiesArtigo The control and prevention of COVID-19 transmission in children: a protocol for systematic review and meta-analysis(Lippincott, Williams & Wilkins, 2020-07-31) Medeiros, Gidyenne Christine Bandeira Silva de; Nunes, Ana Clara de França; Azevedo, Kesley Pablo Morais de; Oliveira Segundo, Victor Hugo de; Santos, Gilberto Martins; Mata, Ádala Nayana de Sousa; Pimenta, Isac Davidson; Bezerra, Isaac Newton Machado; Braga, Liliane Pereira; Capucho, Helaine Carneiro; Piuvezam, Márcia Regina; Barbosa Filho, Valter Cordeiro; Leitão, José Carlos; Martínez, Daniel Guillén; Piuvezam, GrasielaBackground: The pandemic following the rapid spread of the new SARS-CoV-2 virus has hit all continents and caused thousands of deaths worldwide. Evidence has been published on epidemiological and clinical characteristics of population groups considered at risk; however, information for the other population groups, especially for the child population, is needed. In this context, this protocol describes a systematic review that will aim to identify the evidence on control and prevention of COVID-19 transmission among children and adolescents, as well as to describe the epidemiological profile and clinical and immunological characteristics of COVID-19 in this population. Methods: This protocol will be developed in accordance with PRISMA-P. The searches will be conducted in PubMed, Web of Science, ScienceDirect, EMBASE, and Scopus, seeking clinical trials. Observational studies and case reports with Children and adolescents ( 19 years) infected with SARS-CoV-2 will be included whether they report information on the control of prevention and COVID-19 transmission. Two independent researchers will perform the selection of articles, removal of duplication, and screening by Rayyan QCRI application. Cochrane’s RoB 2.0, ROBINS-I, and CASP tools will be used to assess the risk of bias. Meta-analysis, subgroup analyses, and/or descriptive analyses will be carried out based on the data conditions included. Results: A high-quality synthesis of the available evidences on the epidemiological profile, the clinical and immunological characteristics involved in children, and adolescents diagnosed with COVID-19, as well as the participation of this population in the transmission dynamics of SARS-CoV-2 will be provided. Conclusion: This systematic review has an important relevance in the current context because it has a great potential to help the development of new control and prevention strategies in the pediatric population. Record of systematic review: CRD42020179263. Abbreviations: CASP = Critical Appraisal Skills Program, COVID-19 = Corona Virus Disease (2019), PRISMA = Preferred Reporting Items for Systematic Reviews and Meta-Analyses, PRISMA-P = Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols, RoB = Risk of bias, ROBINS-I = Risk of Bias in Non-Randomised Studies – of Interventions, SARS-CoV-2 = Severe Acute Respiratory Syndrome Coronavirus 2Artigo The effects of exercise on BDNF levels in adolescents: a systematic review with meta-analysis(MDPI, 2020-08-20) Azevedo, Kesley Pablo Morais de; Oliveira, Victor Hugo de; Medeiros, Gidyenne Christine Bandeira Silva de; Mata, Ádala Nayana de Sousa; García, Daniel Ángel; Martínez, Daniel Guillén; Leitão, José Carlos; Knackfuss, Maria Irany; Piuvezam, GrasielaThe aim of this study was to analyze the evidence available in the literature about the effects of exercise on brain-derived neurotrophic factor levels in adolescents. The literature searches were conducted in PubMed, Embase, Scopus, ScienceDirect, Web of Science, SportDiscus, the Cochrane Central Register of Controlled Trials (CENTRAL) and CINAHL. Randomized controlled trials and non-randomized controlled trials performed with adolescents (10–19 years) who underwent different exercise programs and who evaluated BDNF levels before and after the intervention were included. We included six studies, four RCTs and two non-RCTs in the systematic review with a total of 407 adolescents. In two randomized trials and one non-RCT, the intervention groups showed significant improvements in BDNF levels compared with the control group. The results presented in the meta-analysis indicate that despite the positive effect in favor of the intervention, there were no significant differences (standardized mean difference 0.28 ng/mL, 95% confidence interval −0.28 to 0.85; p = 0.32, I2 = 0%). The results presented in our review indicate that aerobic exercise programs practiced in moderate- or high-intensity are promising strategies to increase BDNF levels in adolescents. However, further studies are required to support this finding