Sodium bicarbonate ingestion alters the slow but not the fast phase of VO2 kinetics

Article Abstract:

A study is conducted to find the influence of metabolic alkalosis (ALK) induced by sodium bicarbonate (NaHC[O.sub.3]) on pulmonary [O.sub.2] uptake (pV[O.sub.2]) kinetics during high-intensity cycle exercise using a sufficient number of repeat-step transitions. Study results show that NaHC[O.sub.3] ingestion has no significant effect on phase II pV[O.sub.2] kinetics but delays the appearance of the pV[O.sub.2] slow component and reduces end exercise pV[O.sub.2] during cycle exercise in healthy young males.

Science & research, Alkalies and chlorine, Alkalies and Chlorine Manufacturing, Sodium Bicarbonate, Research, Physiological aspects, Alkalosis

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Effects of training status and exercise intensity on phase II VO2 kinetics

Article Abstract:

A study is conducted to test the hypotheses that time constant for fast component of VO2 kinetics at exercise onset is faster in trained subjects and VO2 kinetics becomes progressively slower in untrained subjects at higher power outputs. The results help in concluding that phase II VO2 kinetics become progressively slower at higher outputs for both trained and untrained subjects and the slowing can be attributed to other factors like recruitment of higher threshold motor units.

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Influence of DCA on pulmonary VO2 kinetics during moderate-intensity cycle exercise

Article Abstract:

The theory that drug-induced stimulation of the pyruvate dehydrogenase enzyme complex (PDC) with dichloroacetate (DCA) accelerates phase II pulmonary oxygen uptake (VO2) kinetics during moderate-intensity cycle exercise is examined. The results indicate that PDC activation does not illustrate a chief intramuscular restraint to VO2 kinetics after moderate-intensity cycle exercise.

Care and treatment, Respiration disorders

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