Determining cardiac vagal threshold from short term heart rate complexity

Evaluating individual aerobic exercise capacity is fundamental in sports and exercise medicine but associated with organizational and instrumental effort. Here, we extract an index related to common performance markers, the aerobic and anaerobic thresholds enabling the estimation of exercise capacit...

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Published in:Current directions in biomedical engineering 2016-09, Vol.2 (1), p.155-159
Main Authors: Hamdan, Rami Abou, Schumann, Andy, Herbsleb, Marco, Schmidt, Marcus, Rose, Georg, Bär, Karl-Jürgen, Gabriel, Holger
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Language:English
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aerobic threshold
anaerobic threshold
exercise
HRV
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description Evaluating individual aerobic exercise capacity is fundamental in sports and exercise medicine but associated with organizational and instrumental effort. Here, we extract an index related to common performance markers, the aerobic and anaerobic thresholds enabling the estimation of exercise capacity from a conventional sports watch supporting beatwise heart rate tracking. Therefore, cardiac vagal threshold (CVT) was determined in 19 male subjects performing an incremental maximum exercise test. CVT varied around the anaerobic threshold AnT with mean deviation of 7.9 ± 17.7 W. A high correspondence of the two thresholds was indicated by Bland-Altman plots with limits of agreement −27.5 W and 43.4 W. Additionally, CVT was strongly correlated AnT (r = 0.86, p < 0.001) and reproduced this marker well (r = 0.81). We conclude, that cardiac vagal threshold derived from compression entropy time course can be useful to assess physical fitness in an uncomplicated way.
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subjects aerobic threshold
anaerobic threshold
exercise
HRV
title Determining cardiac vagal threshold from short term heart rate complexity
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