BREATH-BY-BREATH DIFFERENCES BETWEEN EXERCISE GAS EXCHANGE KINETICS MEASURED AT THE MOUTH AND THOSE ESTIMATED AT THE ALVEOLAR LEVEL

SHUNSAKU KOGA; SEIZO TSUSHIMA; TAKASHI UEMURA; TAKAYUKI SAKURAI; TSUNEO TAKAHASHI; YOSHIYUKI FUKUBA; HARUO IKEGAMI

doi:10.7600/jspfsm1949.38.151

In order to study respiratory transients during exercise, we examined breath-by-breath differences between gas exchange kinetics measured at the mouth and those estimated at the alveolar level. The gas exchange data at the mouth were obtained by measurement of expired gases only (expiratory flow method). Correction for breath-by-breath changes in lung gas stores was applied to the total gas exchange, which was obtained by subtracting expired from inspired gas volume (alveolar gas exchange

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... ). Constant work loads (150, 200, 250 W) and a ramp work load (30 W/min) preceded and followed by a 50 W load were generated by a computerized cycle ergometer. Best-fit first-or second-order model values for gas exchange kinetic parameters were found by the non-linear least-squares method.

doi:10.7600/jspfsm1949.38.151 fatcat:conspcfkijah3gojy7jx6d5dta

BREATH-BY-BREATH DIFFERENCES BETWEEN EXERCISE GAS EXCHANGE KINETICS MEASURED AT THE MOUTH AND THOSE ESTIMATED AT THE ALVEOLAR LEVEL Breath-by-breath法による口腔と肺胞における運動時ガス交換動態の相違

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BREATH-BY-BREATH DIFFERENCES BETWEEN EXERCISE GAS EXCHANGE KINETICS MEASURED AT THE MOUTH AND THOSE ESTIMATED AT THE ALVEOLAR LEVEL
Breath-by-breath法による口腔と肺胞における運動時ガス交換動態の相違