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O2 Saturation in the Intercostal Space During Moderate and Heavy Constant-Load Exercise

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Oxygen Transport to Tissue XXXV

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 789))

Abstract

To examine the hypothesis that the relationship between minute ventilation (VE) and deoxygenation from the intercostal space (IC) would be steady regardless of exercise protocols, if an increase in O2 consumption of the accessory respiratory muscles with an increase of VE brings about deoxygenation in IC, we measured the relationship between VE and O2 saturation in IC (SO2IC) during a constant-load exercise test (CET), and the relationship was compared with that during a ramp incremental exercise test (RIET). Six male subjects performed RIET. On a different day, the subjects performed a moderate and heavy CET (CET_MOD and CET_HVY, respectively). SO2IC decreased from the start of both CET_MOD and CET_HVY and changed little from 2 min. Moreover, SO2IC was significantly lower during CET_HVY than during CET_MOD. In comparison between RIET and CET_HVY at the similar VE level, SO2IC was significantly higher during CET_HVY than RIET. These results suggest that the decrease in SO2IC was caused not only by an increase in O2 consumption in IC with an increase in VE but also by a decrease in O2 supply.

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Author information

Authors and Affiliations

  1. Department of Sports Sciences, Japan Institute of Sports Sciences, Tokyo, Japan

    Takuya Osawa

  2. Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan

    Ryotaro Kime, Takuya Osada, Norio Murase & Toshihito Katsumura

  3. Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan

    Masako Fujioka

Authors
  1. Takuya Osawa
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  2. Ryotaro Kime
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  3. Masako Fujioka
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  4. Takuya Osada
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  5. Norio Murase
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  6. Toshihito Katsumura
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Corresponding author

Correspondence to Takuya Osawa .

Editor information

Editors and Affiliations

  1. Department of Electrical Engineering and iMinds Future Health Department, KU Leuven, Leuven, Belgium

    Sabine Van Huffel  & Alexander Caicedo  & 

  2. Neonatal Intensive Care Unit KU Leuven, University Hospitals, Leuven, Belgium

    Gunnar Naulaers

  3. Synthesizer, Inc., Ellicott City, MD, USA

    Duane F. Bruley

  4. Microvascular Measurements, Lorenzen, Italy

    David K. Harrison

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Osawa, T., Kime, R., Fujioka, M., Osada, T., Murase, N., Katsumura, T. (2013). O2 Saturation in the Intercostal Space During Moderate and Heavy Constant-Load Exercise. In: Van Huffel, S., Naulaers, G., Caicedo, A., Bruley, D.F., Harrison, D.K. (eds) Oxygen Transport to Tissue XXXV. Advances in Experimental Medicine and Biology, vol 789. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7411-1_20

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