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Shimomura, Yoshiharu,Nagasaki, Masaru 한국운동영양학회 2002 Journal of exercise nutrition & biochemistry Vol.6 No.2
The metabolism of carbohydrate, fatty acids, and amino acids is greatly affected by acute exercise training. In this review, we summarized the most recevt of the effects of exercise on the metabolism of the substrates used for energy production. We focused mainly on the regulation of glucose transport system, glycolysis, and pyruvate dehydrogenase complex in the glucose metabolism, on the regulation of fatty acid oxidation and the interaction between glucose and fatty acid oxidation in the fatty acid metabolism, on the regulation of branched-chain amino acid catabolism in the amino acid metabolism. The evidence summarizd in this review allows us to understand the molecular mechanisms responsible for the of exercise on the metabolism
Branched-chain amino acids (BCAAs) as nutraceuticals for exercise
( Yoshiharu Shimomura ),( Yasuyuki Kitaura ),( Juichi Sato ) 한국운동영양학회 2011 Physical Activity and Nutrition (Phys Act Nutr) Vol.15 No.3
Branched-chain amino acids (BCAAs: leucine, isoleucine and valine) are essential amino acids for humans and animals. It has been shown that BCAA oxidation is promoted by exercise through activation of branched-chain α-keto acid dehydrogenase complex (BCKDC), which is a rate-limiting enzyme in the catabolic pathway of the BCAAs, and the elevated enzyme activity in skeletal muscle is quickly downregulated after exercise. This tight regulation of the BCKDC is consistent with stimulation of protein synthesis after exercise in skeletal muscle. With this background, it is interesting to consider the BCAAs as a supplement for sports. We conducted a human study to examine the effects of BCAA supplementation on the delayed-onset muscle soreness (DOMS) induced by squatting exercises. The results clearly showed that BCAA supplementation significantly reduced DOMS evaluated by a visual analog scale method and maintained leg muscle force during the period of DOMS. Other studies using different types of exercise support our findings, suggesting that BCAA supplements are useful for conditioning of skeletal muscle after exercise.