Maximal oxygen uptake "classical" versus "contemporary" viewpoints

Article Abstract:

This article is a rebuttal of earlier reports proposing skeletal muscle's involvement in the prevention of progressive myocardial ischemia and skeletal muscle anaerobiosis during maximal exercise. Authors argue that under normal conditions maximal aerobic power of exercise involving large muscles is limited by cardiac output.

Aerobic exercises, Oxygen consumption, Oxygen consumption (Metabolism)

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Effect of eccentric exercise on muscle oxidative metabolism in humans

Article Abstract:

This article examines the effects of an intense, eccentric cycling session on oxidative function in the vastus lateralis muscle. Findings indicate that eccentric cycling resulted in extensive muscle soreness but did not negatively affect muscle oxidative metabolism, local oxygen transport, or muscle oxygen utilization.

Usage, Creatine kinase, Leg, Metabolism, Cycling, Near infrared spectroscopy, Oxygen in the body, Leg muscles

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Effect of Q10 supplementation on tissue Q10 levels and adenine nucleotide catabolism during high-intensity exercise

Article Abstract:

Ubiquinone-10 (Q10) supplementation increases concentration of Q10 during high-intensity exercise in plasma, but not in skeletal muscle. The Q10 concentration at rest, in human skeletal muscle, and in blood plasma was measured in 17 young healthy men before and after a period of high-intensity training with and without Q10 supplementation. One group took a placebo and the other took 120 mg/day of Q10 for 20 days. Effect of Q10 on lipid peroxidation, adenine nucleotide catabolism, and mitochondrial function was also studied. No significant change was seen in concentration of Q10 in skeletal muscle or in isolated skeletal muscle mitochondria in either group.

United States, Exercise physiology, Mitochondria, Antioxidants, Antioxidants (Nutrients), Ubiquinones, Adenylic acid, Adenosine monophosphate

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