ABSTRACT The aim of the study was to systematically review the effect of resistance training with blood flow restriction on muscle strength and functional capacity of clinical populations. This research used SCOPUS, WEB OF SCIENCE and MEDLINE/PubMed databases from the first records until November 2021 and in English. The terms (“blood flow restriction” or “vascular occlusion” or “kaatsu training” and “low intensity”) and (“strength training” or “resistance training” or “strength”) and (“clinical populations” or “elderly” or “old” or “hypertension” or “diabetes” or “myositis” or “obesity” and “chronic diseases”) and (“functional capacity” or “functionality” or “muscle function”) were used. Clinical trials (randomised and non-randomised) were included when compared to high-intensity resistance training, low-intensity resistance training, low-intensity resistance training with blood flow restriction and a control group without physical exercise. The quality of the evidence was assessed using the Testex scale. During the research, 122 articles were pre-selected and analysed, and at the end of the selection, nine articles met all the inclusion criteria and established specifications. We conclude that resistance training associated with blood flow restriction has been an effective and tolerable alternative in improving muscle strength and functional capacity and, therefore, a potential tool for the clinical population.

RESUMO O objetivo do estudo foi revisar sistematicamente o efeito do treinamento de força com restrição de fluxo sanguíneo no ganho de força muscular e capacidade funcional de populações clínicas. Esta pesquisa foi realizada nas bases de dados SCOPUS, WEB OF SCIENCE e MEDLINE/PubMed, desde os primeiros registros até novembro de 2021 e idioma em inglês. Os termos (“Blood flow restriction” OR “vascular occlusion” OR “Kaatsu training”AND “low intensity”) AND (“Strength Training” OR “resistance training” OR “Strength”) AND (“clinical populations” OR “elderly“OR “old” OR “hypertension” OR “diabetes” OR “myositis” OR “obesity”AND “chronic diseases”) AND (“functional capacity” OR “functionality” OR “muscle function”) foram usados. Ensaios clínicos (randomizados e não-randomizados) foram incluídos quando comparados com treinamento de força de alta intensidade, baixa intensidade, baixa intensidade com restrição de fluxo sanguíneo e grupo controle sem exercício físico. A qualidade das evidências foi avaliada pela escala Testex. Durante a pesquisa foram pré-selecionados e analisados 122 artigos e ao final da seleção, nove artigos preencheram todos os critérios de inclusão e especificações estabelecidas. Conclui-se que o treinamento de força associado à restrição de fluxo sanguíneo tem sido uma alternativa eficaz e tolerável na melhora da força muscular e capacidade funcional e, portanto, uma ferramenta potencial para população clínica.

Abstract Aim: In the process of aging, there is a decrease on muscle strength and cognitive function. Resistance training combined with blood flow restriction (BFRRT) has been shown capable of maintaining or improve aspects of physical health. However, the effects of BFRRT the cognitive function of the elderly are not clear. This study aimed to describe the design of a randomized controlled clinical trial, that will investigate the effects of BFRRT on cognitive function, physical performance and physiological and morphological aspects in elderly women. Methods: Forty participants will be randomized into one of the following groups: low load resistance training, blood flow restriction resistance training, moderate load resistance training or Control. All intervention groups will complete 16 weeks of resistance training, three times week (45 minutes each), with training consisting of four exercises for the upper and lower body, including three sets of ten repetitions each. No exercise will be performed by the Control group. Cognitive function will be the primary outcome of the study. Secondary outcomes will include body composition, muscle strength, functional capacity, double-task, level of physical activity, static and dynamic balance, brain activity, BDNF neurotrophic factor, anxiety, depression and sleep state). Conclusion: This project will contribute to the existing knowledge and will have a social impact regarding the use of physical exercise as a non-pharmacological tool for the mental and physical health older individuals. Trial Registration: Brazilian Registry of Clinical Trials number RBR-7BC8ZP.

O objetivo do presente estudo foi verificar o efeito agudo do exercício predominantemente aeróbico (EA) com restrição de fluxo sanguíneo (RFS) sobre a pressão arterial sistólica (PAS), pressão arterial diastólica (PAD) e frequência cardíaca (FC) em jovens saudáveis. Participaram do estudo 13 universitários normotensos (19.5 ± 1.7anos). Os participantes foram divididos randomicamente em duas sessões experimentais (cross-over): a) exercício aeróbico com a RFS (EARFS); b) exercício aeróbico sem a RFS (EASRFS). As sessões foram realizadas com cinco séries de dois minutos e um minuto de intervalo. A PAS, PAD e FC foram mensurados em repouso, no final dos exercícios e durante os 60 minutos pós-exercício. O EASRFS apresentou efeito hipotensivo no 60º pós-exercício (p= 0.029); o EA com e sem RFS elevou significativamente a PAS e FC imediatamente após o exercício (p< 0.05), e o EARFS apresentou valores de PAD e FC superiores, no momento imediatamente pós-exercício, quando comparado com o EASRFS (p= 0.001; p< 0.001, respectivamente). Conclui-se, que o EARFS parece não maximizar o efeito hipotensivo, ambos as sessões podem elevar a PAS e FC imediatamente pós-exercício com valores significativos maiores na PAD e FC para o EARFS.

The aim of the present study was to verify the acute effect of the aerobic exercise (AE) with blood flow restriction (BFR) upon systolic (SBP), diastolic blood pressure (DBP) and heart rate (HR) in health youngsters. Participated in the present study 13 young normotensive students (19.5 ± 1.7 years old). The sample was randomly divided into two experimental protocols: stationary race with BFR and stationary race without BFR. Subjects performed 5 sets of 2 minutes with 1 minute of rest interval for both protocols. SBP, DBP and HR were measured at rest, in the end of the exercises and during 60 minutes after conditions. The AE without BFR presented hypotensive effect 60 minutes post exercise (p= 0.029); the AE with and without BFR elevated significantly the SBP and HR immediately post exercise (p< 0.05) and the AE with BFR presented higher DBP and HR values immediately post-exercise when compared to AE without BFR (p= 0.001; p< 0.001, respectively). It is concluded that the AE without BFR does not seem to maximize the hypotensive effect, both sessions can increase SBP and HR immediately post-exercise with significant higher values in DBP and HR for AE with BFR.

O objetivo do estudo foi identificar e comparar os indicadores de rendimento técnico-tático em função do resultado do set no voleibol feminino escolar. Participaram do estudo 110 atletas, com faixa etária entre 12 a 14 anos, pertencentes a 11 equipes. Foram filmados 58 sets de 28 jogos, e analisados 7194 ações, sendo 2830 saques, 2157 recepções de saque, 1358 levantamentos e 1299 ataques. Em seguida, os sets dos jogos foram agrupados em sets vencedores e perdedores. As equipes que venceram os sets obtiveram vantagem na recepção de saque, no levantamento e no ataque nos critérios de erro e excelência/ponto (p< 0.05) e na qualidade nos coeficientes de levantamento, de saque e de ataque (p< 0.001). Em conclusão, os sets vencedores foram os que apresentaram melhor desempenho técnico-tático de forma quantitativa e qualitativa.

The aim of the study was to identify and compare the technical and tactical performance indicators based on the outcome of the set in the school female volleyball. The study included 110 athletes, aged between 12 and 14 years, belonging to 11 teams. Fifty-eight sets of 28 games were filmed and 7194 actions, 2830 serves, 2157 serve reception, 1358 passes and 1299 attacks were analyzed. Afterwards, the game sets were divided into winners and losers sets. Teams that won the sets had advantage at the serve reception, set and attack on error and excellence/point criteria (p< 0.05) and of serve, set and attack (p< 0.001). In conclusion, the winner’s sets were those with a better technical-tactical performance quantitatively and qualitatively.