27%酸素吸入による女性におけるスプリント運動後の動脈血低酸素血症の軽減

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  • 27% oxygen inhalation attenuates arterial hypoxemia caused by sprint exercise in women
  • 27%サンソ キュウニュウ ニ ヨル ジョセイ ニ オケル スプリント ウンドウ ゴ ノ ドウミャク ケツ テイサンソ ケツショウ ノ ケイゲン

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<p>  We examined whether inhalation of hyperoxic gas improved arterial hypoxemia caused by sprint exercise (EIAH) reported in women. Twelve female university students performed 30 seconds of all-out exercise on a cycle ergometer under two conditions: inhalation of normoxic gas (FIO2 = 0.21) or hyperoxic gas (FIO2 = 0.27). Arterial oxygen saturation of hemoglobin via pulse oximetry (SpO2), heart rate (HR) and blood pressure (BP) were assessed at rest, immediately after and during recovery from the exercise. Ratings perceived exertion (RPE) were obtained immediately and 5 minutes after the exercise. Six of the 12 women experienced EIAH under normoxic condition. In these 6 women, SpO2 declined to 88.7 ± 2.5% within 10 to 14 seconds after completion of the exercise under normoxic condition but remained at 94.7 ± 1.4% under hyperoxic condition. Of the 6 women placed under hyperoxic condition, 3 women did not exhibit EIAH. In contrast, HR, BP and RPE responses to the exercise were comparable under both conditions. Thus, these findings suggest that arterial hypoxemia resulting from sprint exercise might be alleviated with 27% hyperoxic gas inhalation in women.</p>

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