The effect of a carbohydrate--arginine supplement on postexercise carbohydrate metabolism.
The effect of a carbohydrate-arginine supplement on postexercise muscle glycogen storage was investigated. Twelve well-trained cyclists rode for 2 hr on two separate occasions to deplete their muscle glycogen stores. At 0, 1, 2, and 3 hr after each exercise bout, the subjects ingested either a carbohydrate (CHO) supplement (1 g carbohydrate/kg body weight) or a carbohydrate-arginine (CHO/AA) supplement (1 g carbohydrate/kg body mass and 0.08 g arginine-hydrochloride/kg body weight). No difference in rate of glycogen storage was found between the CHO/AA and CHO treatments, although significance was approached. There were also no differences in plasma glucose, insulin, or blood lactate responses between treatments. Postexercise carbohydrate oxidation during the CHO/AA treatment was significantly reduced compared to the CHO treatment. These results suggest that the addition of arginine to a CHO supplement reduces the rate of CHO oxidation postexercise and therefore may increase the availability of glucose for muscle glycogen storage during recovery.
Yaspelkis
B B
BB
Department of Kinesiology and Health Education, University of Texas, Austin, TX 78712, USA.
Ivy
J L
JL
D000328:Adult; D001120:Arginine / Q000008:administration & dosage*; D001642:Bicycling; D001786:Blood Glucose / Q000378:metabolism; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D019587:Dietary Supplements; D015444:Exercise / Q000502:physiology*; D006003:Glycogen / Q000378:metabolism*; D006801:Humans; D007328:Insulin / Q000097:blood; D007700:Kinetics; D019344:Lactic Acid / Q000378:metabolism; D008297:Male; D018482:Muscle, Skeletal / Q000378:metabolism*; D010101:Oxygen Consumption; D011134:Polysaccharides / Q000008:administration & dosage
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D007328:Insulin; D011134:Polysaccharides; D019344:Lactic Acid; C008315:maltodextrin; D006003:Glycogen; D001120:Arginine