Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men

Blood Pressure and Heart Rate Responses to an Isokinetic Testing Protocol in Professional Soccer Players

“…In these series at 240°/s, 25 repetitions of knee flexion/extension were performed, leading to a longer effort time than that in the series at 60°/s (5 repetitions) and 180°/s (10 repetitions). This finding corroborates the results of other studies, in which the increase in HR depends more on the duration than on the intensity of the exercise [ 31 , 60 , 61 , 62 ]. Because isokinetic testing protocol is designed with consecutive series and little recovery time [ 30 , 60 ], it results in higher HR responses than those to isolated series at a given angular velocity or at rest intervals greater than 90 s between each series [ 35 , 63 ].…”

“…We did not identify an influence of angular velocity on the BP response because the increases occurred during the first two series, and SBP subsequently remained unchanged. Some researchers who assessed the SBP response in isokinetic exercise series at different velocities recorded higher SBP at low angular velocities [32,34,67,71], whereas others did not report significant differences between knee flexion-extension series at different angular velocities, as in our case [60,62]. Therefore, it appears logical that in consecutive series of exercise protocols with limited recovery time, angular velocity is not a relevant element in the SBP response.…”

“…On comparison of the HR response of our sample during the isokinetic testing protocol with that in the studies, it is evident that HR in soccer players is much lower than that in untrained adults [ 30 , 31 , 34 , 62 , 68 ]. This suggests that cardiovascular adaptations to soccer players’ training trigger a smaller increase in HR during isokinetic exercises despite our sample having a lower mean age than that of samples in other studies.…”

Concurrent validation of the OMNI-Resistance Exercise Scale of perceived exertion with elastic bands in the elderly

“…In addition to other factors, the adjustments of the cardiovascular system during the exercise are also dependent on the increase of the recruitment of muscular fibers, so that autonomic nervous system and its afferents sympathetic and parasympathetic modulates the heart rate in accordance with demand imposed, increasing the number of heart beats according at the magnitude of the intensity of the strength exercise (Quitério et al, 2011). In this investigation, the heart rate was considered a physiologic analog of the applied force for each set of the different exercises (Miller et al, 2009;Quitério et al, 2011;. Therefore, heart rate served as a co-criterion variable with the applied force in assessing concurrent RPE responsiveness during the different intensities (Miller et al, 2009).…”

Respostas Da Frequência Cardíaca Ao Exercício Resistido E Sua Relação Com a Variabilidade Da Frequência Cardíaca Em Indivíduos Com Fatores De Risco Para Doenças Cardiovasculares

“…Para avaliação das respostas da FC ao esforço máximo, utilizamos o teste de 1RM, que teve um esforço com duração média de oito segundos, caracterizando um estímulo dependente essencialmente da inibição do sistema parassimpático sobre o nodo sinusal 2,11,41,42 . A variação da FC repouso-exercício obtida neste estudo (21,1 bat/min) apresenta semelhança aos achados do estudo de Farinatti e Assis 37 , que, ao avaliar jovens de ambos os sexos, encontraram uma variação de 22,1 bat/min, sendo que a FC variou de 74,9 bat/min na condição de repouso para 97 bat/min no pico do esforço.…”