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Recently, we demonstrated that those with lower hypoxic ventilatory responsiveness of the peripheral chemoreceptors (HVR) exhibited lower BS at given levels of V_E during exercise (J.Physiol.499 : 843-848,1997). On the other hand, it has been reported that those with higher physical fitness tend to have lower HVR and exertional breathlessness. The following two studies were conducted to examine the influences of HVR and physical fitness, which was evaluated by Vo_2max, on BS during exercise.\n(1) Longitudinal study : Eleven nonathletes were asked to perform an endurance training (20-min running, 3 times/week) for 4 weeks. Vo_2max, HVR and V_E-BS relations during an incremental cycle exercise were measured every week. With the time course of the training, rightward shifts of the V_E-BS relation (reduction of BS at given V_E), and finally 14%-increase in Vo_\u003c\u003emax and tendency of lowering of HVR were produced. 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運動時の呼吸困難度と持久性運動能力の関係
https://doi.org/10.24517/00066134
https://doi.org/10.24517/00066134e049a126-92ed-436f-b645-c2cc8fbd8d5b
名前 / ファイル | ライセンス | アクション |
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ED-PR-TAKANO-N-kaken 1999-2p.pdf (68.9 kB)
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Item type | 報告書 / Research Paper(1) | |||||
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公開日 | 2022-05-30 | |||||
タイトル | ||||||
タイトル | 運動時の呼吸困難度と持久性運動能力の関係 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Relationship between breathlessness intensity during exercise and physical fitness | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
ID登録 | ||||||
ID登録 | 10.24517/00066134 | |||||
ID登録タイプ | JaLC | |||||
著者別表示 |
Takano, Nariko
× Takano, Nariko |
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提供者所属 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 金沢大学教育学部 | |||||
書誌情報 |
平成9(1997)年度 科学研究費補助金 基盤研究(C) 研究成果報告書概要 en : 1997 Fiscal Year Final Research Report Summary 巻 1996 – 1997, p. 2p., 発行日 1999-03-15 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 呼吸器疾患のない健常人では、運動時の呼吸困難感の大きさ(BS)は主に換気量(V_E)に依存して増大する。しかし、V_Eが同じであってもBSには個人差があり、これには抹消化学受容器の感受性(HVR)が関与していることを最近我々は見出した(J.Physiol.499:843-848、1997)。一方、持久性運動能力(Vo_2max)の高い人は相対的にHVRは低く、また運動時のBSも低い傾向にあることが報告されているので、今回、運動時のBSに対するVo_2maxとHVRの影響を検討する目的で2つの実験を行ない、以下のような結果を得た。 1.縦断的実験・・・非運動鍛錬者(N=11)に毎回20分、毎週3回の割合で4週間、持久性運動トレーニングを行ってもらい、これに伴う自転人口ルゴメータ漸増負荷運動時のV_E-BS関係の変化とこの変化に及ぼすVo_2maxとHVRの影響を調べた。トレーニングによりVo_2maxは平均14%増加し、HVRは低下傾向を示し、V_E-BS関係は右方移動(あるV_E下でのBSは低下する方向に移動)した。重回帰分析により、V_E-BS関係の右方移動の28%はVo_2maxの増加に、16%はHVRの低下に、残り56%は未知の要因によるものであると推定された。 2.横断的実験・・・Vo_2maxが一般的に高い持久性運動鍛練者(N=9)と逆に低い瞬発製運動鍛練者(N=14)の間で漸増負荷運動時のV_E-BS関係はどう違うか、その違いはVo_2maxやHVRとどのように関連しているかを調べた。持久性鍛練者群のVo_2max(ml/分/kg)は55、瞬発性群では40と両群間に有意差が見られたが、HVRや運動時のV_E-BS関係には差異は見られなかった。縦断的実験における非運動鍛練者群の4週間トレーニング後のVo_2maxは39であったが、V_E-BS関係は上記運動鍛練者群と類似していた。 以上の結果から、運動時の呼吸困難感は運動トレーニングにより軽減されるが、この変化に対するVo_2max増加やHVR低下の関与は小さく、大半は未知の要因、多分、運動時の呼吸困難感の経験と慣れが関係していると推測された。 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In healthy humans, the breathlessness intensity (BS) during exercise increases mainly with an increase in pulmonary ventilation (V_E). Recently, we demonstrated that those with lower hypoxic ventilatory responsiveness of the peripheral chemoreceptors (HVR) exhibited lower BS at given levels of V_E during exercise (J.Physiol.499 : 843-848,1997). On the other hand, it has been reported that those with higher physical fitness tend to have lower HVR and exertional breathlessness. The following two studies were conducted to examine the influences of HVR and physical fitness, which was evaluated by Vo_2max, on BS during exercise. (1) Longitudinal study : Eleven nonathletes were asked to perform an endurance training (20-min running, 3 times/week) for 4 weeks. Vo_2max, HVR and V_E-BS relations during an incremental cycle exercise were measured every week. With the time course of the training, rightward shifts of the V_E-BS relation (reduction of BS at given V_E), and finally 14%-increase in Vo_<>max and tendency of lowering of HVR were produced. A multiple linear regression analysis using these data showed that 28% of the rightward shift of V_E-BS relation was explained by the increase in Vo_2max and 16% by the lowering of HVR.(2) Cross sectional study : V_E-BS relation as in the longitudinal study was measured in 14 sprint and 9 endurance athletes. It was found that V_E-BS relation was similar in the two types of athletes, in which HVR was similar but Vo_2max was much greater in the endurance than in the sprint athletes. In addition, V_E-BS relation after 4-week training in the nonathletes was similar to those in the athletes. These results suggest that the sensation of breathlessness during exericise can be reduced by exercise training, with such a training effect mediated partly by increased Vo_2max and decreased HVR but largely by familiarization with breathlessness sensation. |
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内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 研究課題/領域番号:08670078, 研究期間(年度):1996 – 1997 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 出典:研究課題「運動時の呼吸困難度と持久性運動能力の関係」課題番号08670078 (KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-08670078/086700781997kenkyu_seika_hokoku_gaiyo/)を加工して作成 |
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著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/search/?qm=30019559 | |||||
関連名称 | https://kaken.nii.ac.jp/search/?qm=30019559 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-08670078/ | |||||
関連名称 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-08670078/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-08670078/086700781997kenkyu_seika_hokoku_gaiyo/ | |||||
関連名称 | https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-08670078/086700781997kenkyu_seika_hokoku_gaiyo/ |