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.

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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: 17 nov. 2024.

Issue

Vol. 1 No. 2 (2012)

Section

Artigos

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