Effects of exercise on protein and amino acid metabolism

Modification by Exercise Training of Activity and Enzyme Expression of Hepatic Branched-Chain .ALPHA.-Ketoacid Dehydrogenase Complex in Streptozotocin-Induced Diabetic Rats.

“…Although such effects on BCAA ca tabolism in normal rats have been studied in some de tail (5,7,17), BCAA catabolism in diabetic rats has been largely ignored. In the present study, we hypothe sized that exercise training would improve the BCAA metabolism when training ameliorates diabetic condi tions.…”

The Effects of Corn Peptide Ingestion on Facilitating Alcohol Metabolism in Healthy Men

“…Leucine is more effective than alanine. Leucine is the amino acid metabolized in contracting skeletal muscle 12 ) as well as generating alanine as provider of amino groups to pyruvic acid in muscle. Acute alcohol intake is related to an effect on the metabolism of individual amino acids in brain and contracting skeletal muscle,6) and does not affect the plasma concentration of branched-chain amino acids.…”

“…The increase in the blood is likely to reflect a sufficient supply of NAD+. 7 ,9-11 l Leucine is one of the branched-chain amino acids that are associated with amino acid metabolism in contracting skeletal muscle 12 ) as well as generating alanine as a donor of amino groups to pyruvic acid in muscle.…”

Exercise-induced changes in branched chain amino acid/aromatic amino acid ratio in the rat brain and plasma.

“…In contrast, both free BCAA and AAA increased in the plasma during exercise in the present study. These differences in experimental findings were related to differences in the conditions of exercise loading, since the metabolic efficiency of protein in muscles during exercise is dependent on the intensity and duration of exercise (1).…”

“…Carbohydrates and fats are the principal sources of energy during physical exercise, but protein in the form of amino acids is also mobilized for energy production to a certain degree (1). The types of amino acids utilized in contracting skeletal muscle are branched chain amino acids (BCAA) including valine, isoleucine and leucine (1).…”