The ability of the human organism to recover its autonomic balance soon after physical exercise cessation has an important impact on the individual's health status. Although the dynamics of heart rate recovery after maximal exercise has been studied, little is known about heart rate variability after this type of exercise. The aim of this study is to analyse the dynamics of heart rate and heart rate variability recovery after maximal exercise in healthy young men. Fifteen healthy male subjects (21·7 ± 3·4 years; 24·0 ± 2·1 kg m(-2) ) participated in the study. The experimental protocol consisted of an incremental maximal exercise test on a cycle ergometer, until maximal voluntary exhaustion. After the test, recovery R-R intervals were recorded for 5 min. From the absolute differences between peak heart rate values and the heart rate values at 1 and 5 min of the recovery, the heart rate recovery was calculated. Postexercise heart rate variability was analysed from calculations of the SDNN and RMSSD indexes, in 30-s windows (SDNN(30s) and RMSSD(30s) ) throughout recovery. One and 5 min after maximal exercise cessation, the heart rate recovered 34·7 (±6·6) and 75·5 (±6·1) bpm, respectively. With regard to HRV recovery, while the SDNN(30s) index had a slight increase, RMSSD(30s) index remained totally suppressed throughout the recovery, suggesting an absence of vagal modulation reactivation and, possibly, a discrete sympathetic withdrawal. Therefore, it is possible that the main mechanism associated with the fall of HR after maximal exercise is sympathetic withdrawal or a vagal tone restoration without vagal modulation recovery.
A frequência cardíaca de recuperação pós-exercício é um índice de fácil aplicação que reflete a reativação vagal pósexercício. A ingestão hídrica produz alterações importantes sobre o sistema cardiovascular, promovendo o aumento da modulação vagal cardíaca. O objetivo do presente estudo foi verificar a influência da ingestão hídrica sobre a frequência cardíaca de recuperação. Participaram do experimento dez indivíduos saudáveis. A sessão experimental constou de realização de exercício físico em cicloergômetro, ingestão hídrica e registro da frequência cardíaca de recuperação. Realizou-se também uma sessão de controle. A partir dos valores de frequência cardíaca do exercício e da recuperação, foram calculados os deltas de 60 e 120 segundos de recuperação e comparados entre as condições "ingestão hídrica" e "sessão controle". Observaram-se maiores valores do delta de 120 segundos de recuperação, na condição "ingestão hídrica", em relação à sessão controle. A ingestão hídrica interfere positivamente na recuperação da frequência cardíaca pós-exercício, com forte implicação clínica e desportiva. Palavras-chave: Exercício. Sistema nervoso autônomo. Sistema nervoso parassimpático.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.