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Analysis of heart rate and oxygen uptake kinetics studied by two different pseudo-random binary sequence work rate amplitudes.

Abstract：

PURPOSE:The aim of the study was to compare the kinetics responses of heart rate (HR), pulmonary (V˙O2pulm) and predicted muscular (V˙O2musc) oxygen uptake between two different pseudo-random binary sequence (PRBS) work rate (WR) amplitudes both below anaerobic threshold. METHODS:Eight healthy individuals performed two PRBS WR protocols implying changes between 30W and 80W and between 30W and 110W. HR and V˙O2pulm were measured beat-to-beat and breath-by-breath, respectively. V˙O2musc was estimated applying the approach of Hoffmann et al. (Eur J Appl Physiol 113: 1745-1754, 2013) considering a circulatory model for venous return and cross-correlation functions (CCF) for the kinetics analysis. RESULTS:HR and V˙O2musc kinetics seem to be independent of WR intensity (p>0.05). V˙O2pulm kinetics show prominent differences in the lag of the CCF maximum (39±9s; 31±4s; p<0.05). CONCLUSIONS:A mean difference of 14W between the PRBS WR amplitudes impacts venous return significantly, while HR and V˙O2musc kinetics remain unchanged.

journal_name

Respir Physiol Neurobiol

journal_title

Respiratory physiology & neurobiology

authors

Drescher U,Koschate J,Schiffer T,Schneider S,Hoffmann U

doi

10.1016/j.resp.2017.03.001

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

70-80

eissn

1569-9048

issn

1878-1519

pii

S1569-9048(17)30070-8

journal_volume

240

pub_type

杂志文章

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