Noninvasive positive pressure ventilation enhances the effects of aerobic training on cardiopulmonary function

PloS One
Takashi MorikiFumihiro Tajima

Abstract

The purpose of this study was to determine the effect of aerobic training under noninvasive positive pressure ventilation (NPPV) on maximal oxygen uptake ([Formula: see text]). Ten healthy young male volunteers participated in the study. Before the training, stroke volume (SV) and cardiac output (CO) were measured in all subjects under 0, 4, 8, and 12 cmH2O NPPV at rest. Then, the subjects exercised on a cycle ergometer at 60% of pre-training [Formula: see text] for 30 min daily for 5 consecutive days with/without NPPV. The 5-day exercise protocol was repeated after a three-week washout period without/with NPPV. The primary endpoint was changes in [Formula: see text]. The secondary endpoints were changes in SV, CO, maximum heart rate (HRmax), maximum respiratory rate (RRmax), maximum expiratory minute volume (VEmax) and the percent change in plasma volume (PV). NPPV at 12 cmH2O significantly reduced SV and CO at rest. [Formula: see text] significantly increased after 5 days training with and without NPPV, but the magnitude of increase in [Formula: see text] after training under 12 cmH2O NPPV was significantly higher than after training without NPPV. VEmax significantly increased after training under NPPV, but not after training...Continue Reading

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