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Oscillation in O2 uptake in impulse exercise

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Title: Oscillation in O2 uptake in impulse exercise
Authors: Yano, T. Browse this author →KAKEN DB
Afroundeh, R. Browse this author
Yamanaka, R. Browse this author
Arimitsu, T. Browse this author
Lian, C.S. Browse this author
Shirakawa, K. Browse this author
Yunoki, T. Browse this author →KAKEN DB
Keywords: O2 uptake
O2 consumption
heart rate
impulse exercise
power spectral density
Issue Date: Jun-2014
Publisher: Akadémiai Kiadó
Journal Title: Acta Physiologica Hungarica
Volume: 101
Issue: 2
Start Page: 143
End Page: 149
Publisher DOI: 10.1556/APhysiol.101.2014.2.2
PMID: 24901075
Abstract: The purpose of the present study was to examine 1) whether O2 uptake (VO2) oscillates during light exercise and 2) whether the oscillation is enhanced after impulse exercise. After resting for 1 min on a bicycle seat, subjects performed 5-min pre-exercise with 25 watts work load, 10-s impulse exercise with 200 watts work load and 15-min post exercise with 25 watts work load at 80 rpm. VO2 during pre-exercise significantly increased during impulse exercise and suddenly decreased and re-increased until 23 s after impulse exercise. In the cross correlation between heart rate (HR) and VO2 after impulse exercise, VO2 strongly correlated to HR with a time delay of -4 s. Peak of power spectral density (PSD) in HR appeared at 0.0039 Hz and peak of PSD in VO2 appeared at 0.019 Hz. The peak of the cross power spectrum between VO2 and HR appeared at 0.0078 Hz. The results suggested that there is an oscillation in O2 uptake during light exercise that is associated with the oscillation in O2 consumption in active muscle. The oscillation is enhanced not only by change in O2 consumption but also by O2 content transported from active muscle to the lungs.
Type: article (author version)
Appears in Collections:教育学院・教育学研究院 (Graduate School of Education / Faculty of Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 矢野 徳郎

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