O efeito do treino de força crónico com restrição de fluxo sanguíneo nos parâmetros hemodinâmicos em adultos saudáveis
Miniatura indisponível
Data
2022
Autores
Título da revista
ISSN da revista
Título do Volume
Editora
Resumo
Introdução: O treino resistido (TR) com restrição do fluxo sanguíneo (RFS) significa a realização de exercícios de força com diminuição do fluxo sanguíneo arterial para os músculos ativos. A diminuição do sangue arterial disponível para os músculos ativos impede que a intensidade e o volume do exercício sejam tão altos em comparação com o treino resistido sem RFS. As respostas hemodinâmicas ao TR-RFS parecem causar contração muscular com baixo fluxo sanguíneo, elevando o estresse metabólico, diminuindo o retorno venoso, exacerbando a atividade simpática e aumentando a resistência vascular periférica, que juntos aumentam agudamente a tensão arterial e a frequência cardíaca. No entanto, os efeitos hemodinâmicos crónicos do TR-RFS e sua comparabilidade com o treino resistido sem RFS e mesmo em comparação com grupos sem treino, ainda são escassos e precisam ser investigados. Objetivos: O objetivo desta revisão sistemática com meta-análise da literatura revisada por pares foi examinar os efeitos crónicos do TR-RFS na tensão arterial em adultos aparentemente saudáveis (PROSPERO: Registro: CRD42022339510). Metodologia: Foi realizada uma busca bibliográfica nas bases de dados PubMed, Sports Discus, Scielo e Web of Science. Dois revisores independentes extraíram as características do estudo e as medidas de tensão arterial. Foram avaliados o risco de viés através da Risk of Bias [ferramenta da Cochrane para ensaios clínicos randomizados (RoB-2)] e a certeza da evidência [através da escala Grading of Recommendations, Assessment, Development, and Evaluation (GRADE)]. Um total de oito estudos preencheram os critérios de inclusão para tensão arterial sistólica (TAS), diastólica (TAD) e média (TAM). Resultados: Em relação à comparação TR-RFS versus não exercício, não foram observadas diferenças significativas a favor do grupo exercício (p>0,05). No entanto, quando comparado ao treino de força sem RFS, o TR-RFS promoveu melhorias adicionais na TAD (-3,35; IC 95% -6,00 a -0,71; I2 = 14%; z = -2,48, p = 0,01), e também na TAM (-3,96; IC 95% -7,94 a 0,02; I2 = 43%; z = -1,95, p = 0,05). Conclusão: Os resultados indicam que o TR-RFS pode promover uma diminuição na TAD, mas a falta de dados sobre este tópico torna qualquer conclusão especulativa. Futuras pesquisas sobre este tópico são garantidas
Introduction: Resistance training (RT) with blood flow restriction (BFR) means the performance of strength exercises with decreased arterial blood flow to the active muscles and impeded venous return. The decreased available arterial blood into the active muscles hinders exercise intensity and volume from being as high compared to resistance training without BFR. Hemodynamic responses to RT-BFR seems to cause muscle contraction at low blood flow elevates metabolic stress, diminishes venous return, exacerbates sympathetic activity, and increases peripheral vascular resistance, which together acutely raise blood pressure and heart rate. Although, the chronic hemodynamic effects of RT-BFR and its comparability against resistance training without BFR and even versus non-training conditions are still scarce and need to be investigated. Aims: The purpose of this systematic review and meta-analysis of peer-reviewed literature was to examine the chronic effects of resistance training with blood flow restriction (RT-BFR) on blood pressure in apparently healthy adults (PROSPERO: Registry: CRD42022339510). Methodology: A literature search was conducted across PubMed, Sports Discus, Scielo and Web of Science databases. Two independent reviewers extracted study characteristics and blood pressure measures. Risk of bias [The Cochrane risk of bias tool for randomized controlled trials (RoB-2)], and the certainty of the evidence [Grading of Recommendations, Assessment, Development, and Evaluation (GRADE)] were determined. A total of eight studies met the inclusion criteria for systolic (SBP), diastolic (DBP) and mean arterial pressure (MAP). Results: Regarding the comparison RT-BFR versus non-exercise, no significant differences favoring the exercise group were observed (p>0.05). However, when compared to TRT, the RT-BFR elicited additional improvements on DBP (-3.35; 95%CI -6.00 to -0.71; I2 = 14%; z = -2.48, p = 0.01), and on MAP ( -3.96; 95%CI -7.94 to 0.02; I2 = 43%; z = -1.95, p = 0.05). Conclusion: Results indicate that RT-BFR may elicit a decrease in DBP, but the lack of data addressing this topic makes any conclusion speculative. Future research on this topic is warranted.
Introduction: Resistance training (RT) with blood flow restriction (BFR) means the performance of strength exercises with decreased arterial blood flow to the active muscles and impeded venous return. The decreased available arterial blood into the active muscles hinders exercise intensity and volume from being as high compared to resistance training without BFR. Hemodynamic responses to RT-BFR seems to cause muscle contraction at low blood flow elevates metabolic stress, diminishes venous return, exacerbates sympathetic activity, and increases peripheral vascular resistance, which together acutely raise blood pressure and heart rate. Although, the chronic hemodynamic effects of RT-BFR and its comparability against resistance training without BFR and even versus non-training conditions are still scarce and need to be investigated. Aims: The purpose of this systematic review and meta-analysis of peer-reviewed literature was to examine the chronic effects of resistance training with blood flow restriction (RT-BFR) on blood pressure in apparently healthy adults (PROSPERO: Registry: CRD42022339510). Methodology: A literature search was conducted across PubMed, Sports Discus, Scielo and Web of Science databases. Two independent reviewers extracted study characteristics and blood pressure measures. Risk of bias [The Cochrane risk of bias tool for randomized controlled trials (RoB-2)], and the certainty of the evidence [Grading of Recommendations, Assessment, Development, and Evaluation (GRADE)] were determined. A total of eight studies met the inclusion criteria for systolic (SBP), diastolic (DBP) and mean arterial pressure (MAP). Results: Regarding the comparison RT-BFR versus non-exercise, no significant differences favoring the exercise group were observed (p>0.05). However, when compared to TRT, the RT-BFR elicited additional improvements on DBP (-3.35; 95%CI -6.00 to -0.71; I2 = 14%; z = -2.48, p = 0.01), and on MAP ( -3.96; 95%CI -7.94 to 0.02; I2 = 43%; z = -1.95, p = 0.05). Conclusion: Results indicate that RT-BFR may elicit a decrease in DBP, but the lack of data addressing this topic makes any conclusion speculative. Future research on this topic is warranted.
Descrição
Orientação: Lucimere Bohn
Palavras-chave
MESTRADO EM EXERCÍCIO E SAÚDE, ATIVIDADE FÍSICA, PHYSICAL ACTIVITY, TREINO DA FORÇA, STRENGTH TRAINING, CIRCULAÇÃO SANGUÍNEA, TENSÃO ARTERIAL, BLOOD PRESSURE