Effect of Differential Pedal Rate on Ventilatory Indicators and Human Salivary Chromogranin A during Induced Locomotor Respiratory Coupling

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  • KERA Takeshi
    Department of Physical Therapy, Nihon Institute of Medical Science
  • OSHIMA Yohei
    Rehabilitation unit of Kyoto University Hospital
  • TAMAKI Akira
    Department of Phyiotherapy, School of Rehabilitation, Hyogo University of Health Sciences

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Other Title
  • ペダル回転数が運動呼吸同調現象誘導時の換気諸量と唾液クロモグラニンＡの分泌に与える影響
  • ペダル カイテンスウ ガ ウンドウ コキュウ ドウチョウ ゲンショウ ユウドウジ ノ カンキ ショ リョウ ト ダエキ クロモグラニン A ノ ブンピツ ニ アタエル エイキョウ

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Abstract

[Purpose] We studied the effect of the cycle ergometer pedal ratio calculated during locomotor respiratory coupling (LRC) on ventilatory indicators and salivary chromogranin A. [Subjects] Twenty-five subjects participated in our study. [Methods] The subjects were divided into 2 groups: one group performed pedaling at a rate of 50 rpm, and the other group performed pedaling at 40 rpm. First, the subjects pedaled at the anaerobic threshold (AT) under the spontaneous breathing condition for 10 min, and then performed the same exercise under LRC. [Results] The 50-rpm group showed persistent dyspnea under LRC; however, the 40-rpm group showed a significant decrease in the respiratory rate and dyspnea. Human salivary chromogranin A level was not related to coupling between pedaling and breathing. [Conclusion] Dyspnea decreased when the breathing rate during LRC was lesser than that during spontaneous breathing.<br>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 26 (4), 531-535, 2011

    The Society of Physical Therapy Science

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