Quantification and physiological significance of the rightward shift of the V-slope during incremental cardiopulmonary exercise testing.

ABSTRACT:

Background

Ventilatory anaerobic threshold (VAT) is frequently used as a measure of exercise tolerance, with the V-slope method being the standard; however, this needs to be visually determined. Over the years, we have observed that the V-slope itself often appears to shift rightward before the appearance of the VAT (RtShift: rightward shift of V-slope). This phenomenon has long been known to occur during the first 1-2 min of steady-state exercise and disappears thereafter; it is attributed to CO₂ storage, presumably in active muscle. However, during incremental exercise, we have observed that the RtShift persists; furthermore, it seems to be related to the level of VAT. Therefore, we attempted to objectively quantify the RtShift, and to confirm its relationship to an in

SUBMITTER: Nishijima H 

PROVIDER: S-EPMC5397810 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature