Reliability of heart rate variability analysis during submaximal exercise in subjects aged 60 years and older

Authors

  • Fernanda Rocha Corrêa Department of Human Movement Sciences, Federal University of São Paulo, Santos, São Paulo, Brazil.
  • Ricardo Luís Fernandes Guerra Department of Human Movement Sciences, Federal University of São Paulo, Santos, São Paulo, Brazil.
  • Victor Zuniga Dourado Department of Human Movement Sciences, Federal University of São Paulo, Santos, São Paulo, Brazil.

Keywords:

Walking, Heart rate variability, Exercise, Six-minute walk test, Reliability

Abstract

Background: Assessment of heart rate variability (HRV) during the 6-min walk test (6MWT) may be useful for quantifying the effects of interventions on the cardiovascular system.
Objective: To evaluate the reliability of HRV analysis during 6MWT in older adults.
Methods: Thirty-eight participants aged 60 years and older (23 females) performed two 6MWTs at least 30-min apart. The RR intervals of heartbeats were quantified throughout the 6MWTs and the last 2-min were considered for analysis. The square root of the mean square successive difference of RR intervals (RMSSD) and instantaneous beat-to-beat variability (SD1) were the indices used. We compared means, applied intraclass correlations (ICC), and plotted differences in the Bland and Altman approach of these indices.
Results: We found no significant differences in HRV or total distance walked between the first and second tests. The reliability of RMSSD (0.904; 0.815 – 0.950) and SD1 (0.902; 0.812 – 0.949) was excellent considering ICC values and a 95% confidence interval. The agreement of these indices was also acceptable for Bland and Altman plots using logarithms.
Conclusions: The reliability of some HRV indices during the 6MWT was acceptable. This evaluation might be useful in quantifying the effects of various interventions on the autonomic modulation of the heart.

Downloads

Download data is not yet available.

Downloads

Published

18-06-2013

How to Cite

CORRÊA, F. R.; GUERRA, R. L. F.; DOURADO, V. Z. Reliability of heart rate variability analysis during submaximal exercise in subjects aged 60 years and older. Journal of Respiratory and CardioVascular Physical Therapy, [S. l.], v. 1, n. 2, p. 37–43, 2013. Disponível em: https://periodicos.ufrn.br/revistadefisioterapia/article/view/3597. Acesso em: 22 jun. 2024.

Issue

Section

Artigos