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Clinical Autonomic Research
Published in: Clinical Autonomic Research 2/2011

01-04-2011 | Research Article

Relation of heart rate recovery to heart rate variability in persons with paraplegia

Authors: Sae Young Jae, Kevin S. Heffernan, Miyoung Lee, Bo Fernhall

Published in: Clinical Autonomic Research | Issue 2/2011

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Abstract

Purpose

Heart rate recovery (HRR) after treadmill exercise testing is an index of cardiac autonomic activity in non-disabled persons, but it is unknown if this is also the case in individuals with spinal cord injury (SCI). We investigated the relationship between HRR after maximal arm exercise testing and resting autonomic activity in persons with paraplegia.

Methods

A total of 17 (male n = 9, female n = 8) active individuals with paraplegia (injury below T6) were included in the study. Frequency domain analyses of resting heart rate variability were obtained and participants completed a maximal arm exercise test. HRR was calculated as the difference between peak heart rate during the test and heart rate 1 min (HRR1) and 2 (HRR2) min after cessation of exercise.

Results

HRR 1 and HRR 2 were statistically significantly correlated with high-frequency (HF) power (r = 0.46, p < 0.05 and r = 0.47, p < 0.05) and the LF/HF ratio (r = −0.49, p < 0.05 and r = −0.50, p < 0.05). After adjusting for age, peak heart rate and peak oxygen uptake, HRR 2 was still significantly associated with HF power (r = 0.50, p < 0.05) and the LF/HF ratio (r = −0.58, p < 0.05).

Conclusions

These findings indicate that HRR after maximal arm exercise testing is associated with resting cardiac autonomic activity in persons with paraplegia. This would suggest that HRR after maximal arm exercise testing can be used as an index of autonomic function in this population.
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Metadata
Title
Relation of heart rate recovery to heart rate variability in persons with paraplegia
Authors
Sae Young Jae
Kevin S. Heffernan
Miyoung Lee
Bo Fernhall
Publication date
01-04-2011
Publisher
Springer-Verlag
Published in
Clinical Autonomic Research / Issue 2/2011
Print ISSN: 0959-9851
Electronic ISSN: 1619-1560
DOI
https://doi.org/10.1007/s10286-010-0096-0

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