Bioenergetics of the VO₂ slow component between exercise intensity domains.

ABSTRACT: During heavy and severe constant-load exercise, VO₂ displays a slow component (VO_2sc) typically interpreted as a loss of efficiency of locomotion. In the ongoing debate on the underpinnings of the VO_2sc, recent studies suggested that VO_2sc could be attributed to a prolonged shift in energetic sources rather than loss of efficiency. We tested the hypothesis that the total cost of cycling, accounting for aerobic and anaerobic energy sources, is affected by time during metabolic transitions in different intensity domains. Eight active men performed 3 constant load trials of 3, 6, and 9 min in the moderate, heavy, and severe domains (i.e., respectively below, between, and above the two ventilatory thresholds). VO₂, VO₂ of ventil

SUBMITTER: Colosio AL 

PROVIDER: S-EPMC7476983 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature