The final frontier: oxygen flux into muscle at exercise onset.

Exerc Sport Sci Rev

Department of Kinesiology, Kansas State University, Manhattan, KS 66506-5802, USA.

Published: October 2007

In humans at exercise onset, intramuscular phosphocreatine decreases immediately, whereas muscle oxygen (O2) uptake seems to rise after a delay of up to 15 s which is inconsistent with models of metabolic control. Novel microcirculatory investigations reveal that elevated capillary-to-myocyte O2 flux in rat muscle is, in fact, initiated simultaneously with contractions.

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http://dx.doi.org/10.1097/jes.0b013e318156e4acDOI Listing

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