Acute cardiovascular response of older women to three resistance exercise protocols.

As respostas cardiovasculares agudas foram comparadas entre tr?s diferentes protocolos de treinamento resistido de alta velocidade de contra??o muscular em mulheres idosas destreinadas. Doze voluntarias, aparentemente saud?veis (62.6 } 2,9 anos), realizaram tr?s diferentes protocolos no supino horizontal (SH) e no leg press 45o (LP). Todos os protocolos envolveram tr?s series de 10 repeticoes realizados com uma carga de 10RM e 2 minutos de recuperacao entre as series. O protocolo continuo consistiu em 10 repeticoes, com nenhuma pausa entre as repeticoes. Os protocolos descontinuos foram realizados com uma pausa de cinco (PD5) ou 15 (PD15) segundos, entre a quinta e sexta repeticoes. Frequencia cardiaca (FC), pressao arterial sistolica (PAS) e duplo produto (DP) foram avaliados no repouso e ao final de todas as series nos exercicios. ANOVA fatorial foi usada para comparar as respostas cardiovasculares entre os diferentes protocolos. Comparado com o repouso, FC, PAS e DP foram respectivamente 22.3%, 23.2% e 51.2% (p < 0.05) maiores no exerc?cio SH e 41.7%, 43.0% e 102.9% (p < 0.05) maiores no exercicio LP, apos a terceira serie, em todos os protocolos. FC e DP foram 5.6% e 8.2% (p < 0.05), respectivamente, menores no DP5 e DP15 comparado com o PC, no exercicio SH. A FC, PAS e DP foram 5.2%, 8.0% e 14,8% ,respectivamente, menores no DP5 comparado com o PC, no exercicio LP. Portanto, parece que o exercicio resistido de alta velocidade descontinuo tem uma menor demanda cardiovascular do que exercicio resistido continuo em mulheres idosas.Acute cardiovascular responses to different high-velocity resistance exercise protocols were compared in untrained older women. Twelve apparently healthy volunteers (62.6 ? 2.9 years) performed three different protocols on the bench press (BP) and leg press (LP). All protocols consisted of three sets of 10 repetitions performed with a 10RM load and 2 min of rest between sets. The continuous protocol (CP) consisted of 10 repetitions with no pause between repetitions. The discontinuous protocols were performed with a pause of five (DP5) or 15 (DP15) seconds between the fifth and sixth repetition. Heart rate (HR), systolic blood pressure (SBP), and rate pressure product (RPP) were assessed at baseline and at the end of all exercise sets. Factorial ANOVA was used to compare the cardiovascular response among different protocols. Compared to baseline, HR, SBP and RPP were, respectively, 22.3%, 23.2% and 51.2% (p < 0.05) higher for BP exercise, and 41.7%, 43.0% and 102.9% (p < 0.05) higher for LP exercise after the third set in all protocols. For BP exercise, HR and RPP were 5.6% and 8.2% (p < 0.05) lower in DP5 and DP15, respectively, compared to CP. For LP exercise, HR, SBP and RPP were, respectively, 5.2%, 8.0% and 14.8% lower in DP5 compared to CP. In conclusion, discontinuous high-velocity resistance exercise seems to have a lower cardiovascular demand than continuous resistance exercise in older women