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Effect of Work Intensity on Time Delay in Mediation of Ventilation by Arterial Carbon Dioxide During Recovery From Impulse Exercise

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Title: Effect of Work Intensity on Time Delay in Mediation of Ventilation by Arterial Carbon Dioxide During Recovery From Impulse Exercise
Authors: Afroundeh, R. Browse this author
Arimitsu, T. Browse this author
Yamanaka, R. Browse this author
Lian, C. S. Browse this author
Shirakawa, K. Browse this author
Yunoki, T. Browse this author →KAKEN DB
Yano, T. Browse this author →KAKEN DB
Keywords: Arterial CO2 pressure
Impulse-like exercise
Time delay
Ventilation
Issue Date: Sep-2014
Publisher: Institute of Physiology, Czech Academy of Sciences
Journal Title: Physiological Research
Volume: 63
Issue: 4
Start Page: 457
End Page: 463
PMID: 24702492
Abstract: Time delay in the mediation of ventilation (V. E) by arterial CO2 pressure (PaCO2) was studied during recovery from short impulse-like exercises with different work loads of recovery. Subjects performed two tests including 10-s impulse like exercise with work load of 200 watts and 15-min recovery with 25 watts in test one and 50 watts in test two. V. E, end tidal CO2 pressure (PETCO2) and heart rate (HR) were measured continuously during rest, warming up, exercise and recovery. PaCO2 was estimated from PETCO2 and tidal volume (V-T). Results showed that predicted arterial CO2 pressure (PaCO2 pre) increased during recovery in both tests. In both tests, VE increased and peaked at the end of exercise. VE decreased in the first few seconds of recovery but started to increase again. The highest correlation coefficient between PaCO2 (pre) and VE was obtained in the time delay of 7 s (r= 0.854) in test one and in time delays of 6 s (r= 0.451) and 31 s (r= 0.567) in test two. HR was significantly higher in test two than in test one. These results indicate that PaCO2 pre drives VE with a time delay and that higher work intensity induces a shorter time delay.
Type: article
URI: http://hdl.handle.net/2115/57425
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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