PMID: 8983919Jan 1, 1995Paper

Blood lactate and pyruvate concentrations, and their ratio during exercise in healthy children: developmental perspective

European Journal of Applied Physiology and Occupational Physiology
P PianosiJ C Haworth

Abstract

Blood concentrations of lactate normally increase during and after intense exercise as does the ratio of concentrations of lactate to pyruvate (L:P). Since there appear to be differences in blood lactate concentrations on exercise, in muscle metabolic enzyme activities, and in anaerobic capacity between children and adults, we speculated that there would be age related differences in lactate and pyruvate concentrations, and their ratio among children. Whole blood concentrations of lactate and pyruvate were measured in 28 healthy children aged 7-17 years, split into three age groups: less than 11, 11-14, and 15-17 years. Blood was drawn at rest, immediately after 6 min of exercise at one-third and two-thirds of maximum work capacity (Wmax), and 20 min after completion of work. Lactate and pyruvate concentrations increased significantly from rest to exercise at two-thirds Wmax [approximately 72% of peak oxygen consumption (VO2peak)]. Whereas greater increments in lactate concentration were seen with groups of increasing age, exercise-related increments in pyruvate concentrations were no different among age groups. There was a significant rise in L:P ratio on exercise, with greater increments found from the youngest to the oldest ...Continue Reading

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Citations

Feb 22, 2012·Bioresource Technology·Juan-Rodrigo Bastidas-OyanedelDamien John Batstone
Mar 3, 2004·Journal of Applied Physiology·Gregory C HendersonGeorge A Brooks
Jul 14, 2018·Pediatric Exercise Science·Daisuke KumeHiroshi Endoh
May 6, 2015·British Journal of Sports Medicine·Neil ArmstrongAlison M McManus
Apr 12, 2001·Journal of Applied Physiology·C A WilliamsJ H Doust

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