Efeito agudo do precondicionamento isquêmico aplicado antes de testes de força isométrica e endurance mucular sobre as variáveis hemodinâmicas em homens treinados / Acute effect of ischemic preconditioning applied before isometric strength and muscular endurance tests on hemodynamic variables in trained men

Luiz Guilherme da Silva Telles, Aline Aparecida de Souza Ribeiro, Estêvão Monteiro Rios, Gleisson da Silva Araújo, Giovanni da Silva Novaes, Michelle de Souza Ribeiro, Jeferson Macedo Vianna, Jefferson da Silva Novaes

Abstract


O pré-condicionamento isquêmico (PCI) é um procedimento que consiste na aplicação de um aparelho para a oclusão vascular (OV), alternando momentos de OV e reperfusão. O PCI é um método de trabalho empregado para bloquear o fluxo sanguíneo de maneira remota e não invasiva, através de um torniquete pneumático antes de realização de um exercício. Diversos estudos têm investigado os efeitos do PCI no desempenho esportivo e muscular. Entretanto, poucos estudos investigaram os efeitos do PCI sobre as respostas hemodinâmicas após o exercício. Portanto, o objetivo do presente estudo foi investigar o efeito agudo do PCI aplicado antes de testes de força isométrica e de endurance muscular sobre a pressão arterial sistólica (PAS), pressão arterial diastólica (PAD), frequência cardíaca (FC), duplo produto (DP), pressão arterial média (PAM) e saturação de oxigênio (SPO2) em homens treinados. A amostra foi composta por 12 indivíduos saudáveis, treinados recreacionalmente.  O estudo foi realizado em um total de 3 visitas em dias não consecutivos (3 a 7 dias de intervalo). Durante a primeira visita ao laboratório foram assinalados os Termos de Consentimentos Livres e Esclarecidos (TCLE), de acordo com a declaração de Helsinki, em seguida, respondidos os Physical Activity Readiness Questionnaire / PAR-Q, imediatamente após foram avaliados a antropometria e em seguida uma familiarização com os testes e o método. Na segunda e terceira visita os voluntários foram divididos aleatoriamente com entrada contrabalanceada e alternada, nos seguintes protocolos experimentais:a) PCI + testes de força isométrica e testes de endurance muscular (PCI); b) protocolo controle (CON) testes de força isométrica e testes de endurance muscular, logo após os foram mensuradas as variáveis hemodinâmicas. Os resultados motraram que as respostas da PAS, PAD, FC, DP, PAM e SPO2 não apresentaram diferenças significativas entre os protocolos PCI e CON (p> 0.05). A PAS foi significativamente maior no PCI comparando o momento pré vs. pós (p=0.01).  A FC foi significativamente maior, comparando pré vs. pós, no PCI (p=0.01) e no CON (p=0.01). O DP foi significativamente maior, comparando pré vs. pós, no PCI (p=0.01) e no CON (p=0.01). A PAMnão apresentou diferenças significativas, comparando pré vs. pós, nos protocolos PCI e CON (p>0.05). A SPO2 não apresentou diferenças significativas, comparando pré vs. pós, nos protocolos PCI e CON (p>0.05). Em conclusão, nossos achados demonstraram que aplicação do PCI antes de teste de força isométrica e de endurance muscular não alteraram significativamente as respostas hemodinâmicas (PAS, PAD, FC, DP, PAM e SPO2) em homens treinados.

 


Keywords


Pré-condicionamento isquêmico, força isométrica, endurance muscular, hemodinâmica.

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DOI: https://doi.org/10.34119/bjhrv4n1-257

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