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Comparison of Oxygen Uptake at the Onset of Decrement-Load and Constant-Load Exercise

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/51987

Title: Comparison of Oxygen Uptake at the Onset of Decrement-Load and Constant-Load Exercise
Authors: YANO, T. Browse this author
OGATA, H. Browse this author
MATSUURA, R. Browse this author
ARIMITSU, T. Browse this author
YUNOKI, T. Browse this author
Keywords: Heavy exercise
Moderate exercise
Oxygen debt
Oxygen uptake
Issue Date: 2007
Publisher: Institute of Physiology, Czech Academy of Sciences
Journal Title: Physiological Research
Volume: 56
Start Page: 169
End Page: 174
Abstract: The purpose of the present study was to examine whether the level of oxygen uptake (V.o2) at the onset of decrementload exercise (DLE) is lower than that at the onset of constant-load exercise (CLE), since power output, which is the target of V.o2 response, is decreased in DLE. CLE and DLE were performed under the conditions of moderate and heavy exercise intensities. Before and after these main exercises, previous exercise and post exercise were performed at 20 watts. DEL was started at the same power output as that for CLE and power output was decreased at a rate of 15 watts per min. V.o2 in moderate CLE increased at a fast rate and showed a steady state, while V.o2 in moderate DLE increased and decreased linearly. V.o2 at the increasing phase in DLE was at the same level as that in moderate CLE. V.o2 immediately after moderate DLE was higher than that in the previous exercise by 98±77.5 ml/min. V. o2 in heavy CLE increased rapidly at first and then slowly increased, while V.o2 in heavy DLE increased rapidly, showing a temporal convexity change, and decreased linearly. V.o2 at the increasing phase of heavy DLE was the same level as that in heavy CLE. V .o2 immediately after heavy DLE was significantly higher than that in the previous exercise by 156±131.8 ml/min. Thus, despite the different modes of exercise, V.o2 at the increasing phase in DLE was at the same level as that in CLE due to the effect of the oxygen debt expressed by the higher level of V.o2 at the end of DLE than that in the previous exercise.
Type: article
URI: http://hdl.handle.net/2115/51987
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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