This case report describes the responses to incremental work-rate exercise in a healthy subject (with normal pulmonary function), for whom the pulmonary gas exchange (V-slope) and ventilatory-related indexes (ie, ventilatory equivalents and end-tidal partial pressures for O2 and CO 2) uncharacteristically do not occur at the same metabolic rate. Based on the results of additional constant-work-rate exercise tests, we propose that in the (occasional) event of such a dissociation between the V-slope and ventilatory-related responses normally associated with the lactate threshold (θL), then the V-slope index should take priority as the θL estimator.
|Titolo:||Noninvasive estimation of the lactate threshold in a subject with dissociated ventilatory and pulmonary gas exchange indices : a case report|
AGOSTONI, PIERGIUSEPPE (Ultimo)
|Parole Chiave:||Acid base; Exercise; Ventilation|
|Settore Scientifico Disciplinare:||Settore MED/11 - Malattie dell'Apparato Cardiovascolare|
|Data di pubblicazione:||dic-2007|
|Digital Object Identifier (DOI):||10.1378/chest.07-0402|
|Appare nelle tipologie:||01 - Articolo su periodico|