In all training sessions, pCO 2 was higher and blood pH was lower in the Exp group (p < 0.001) ensuring respiratory acidosis. Pre-test and two post-training incremental exercise tests were performed for the detection of gas exchange variables. Subjects in Exp group were breathing through additional respiratory dead space (1200ml), while subjects in Con group were breathing without additional dead space. A single training session consisted of continuous, constant-rate exercise on a cycle ergometer at 60% of VO 2max which was maintained for 30 minutes. The training consisted of 12 sessions, performed twice a week for 6 weeks. Two groups of young healthy males: Experimental (Exp, n = 15) and Control (Con, n = 15), participated in this study. ![]() The primary outcome measures were respiratory exchange ratio (RER) and carbon dioxide production (VCO 2). The purpose of the study was to investigate the effects of implementing additional respiratory dead space during cycloergometry-based aerobic training.
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