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Open Access A duração do exercício determina a magnitude e a duração da hipotensão pós-exercício Exercise duration determines the magnitude and duration of post-exercise hypotension

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OBJETIVO: Considerando-se que a duração do exercício físico possa influenciar a hipotensão pós-exercício, testamos a hipótese de que o exercício submáximo mais prolongado provoca queda pressórica de maior magnitude e duração que o exercício mais curto.MÉTODOS: Protocolo experimental - 10 indivíduos realizaram duas sessões de exercício (25 e 45min) no cicloergômetro em 50%VO2 pico. Protocolo controle - 12 indivíduos permaneceram em repouso por 45min. A pressão arterial (PA) foi aferida antes (20min) e após (90min) o exercício ou o repouso. RESULTADOS: Protocolo experimental - a PA sistólica diminuiu significantemente pós-exercício e essa queda foi maior e mais prolongada após 45min de exercício. A PA média e diastólica diminuíram significantemente pós-exercício e foram significantemente menores na sessão de 45min. Protocolo controle - a PA não se alterou durante a sessão controle. CONCLUSÃO: O exercício físico de maior duração provoca hipotensão pós-exercício maior e mais prolongada.
PURPOSE: Considering that exercise duration may play a role in post-exercise hypotension, we tested the hypothesis that a prolonged submaximal exercise would lead to a greater and longer blood pressure fall after exercise than a shorter exercise bout. METHODS: Experimental protocol - 10 subjects were submitted to two cycle ergometer exercise trials (25 and 45min) at 50% of VO2 peak. Control protocol - 12 subjects rested in the sitting position for 45min. Blood pressure (BP) was measured before (20min) and after (90min) rest or exercise bouts. RESULTS: Systolic BP decreased significantly after exercise and this reduction was greater and lasted longer after 45min of exercise. Mean and diastolic BP decreased after exercise and they were significantly lower during the 45min session. Control protocol - no change in BP was observed after resting condition. CONCLUSION: A longer exercise bout leads to a greater and longer post-exercise hypotension.
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Document Type: Research Article

Publication date: January 1, 1998

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