Journal of Chaohu University ›› 2019, Vol. 21 ›› Issue (3): 109-113.doi: 10.12152/j.issn.1672-2868.2019.03.015
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Objective To investigate the effects of different carbohydrate mixtures on glycogen synthesis after exercise. Methods Twenty-four college long-distance runners participated in the study and were randomly divided into three groups: group A; group B and group C. The body composition and diet of the subjects were evaluated before the experiment. Blood samples were taken after oral administration of a 1 g/kg body weight mixture before and after exercise. The mixture was a maltodextrin-glucose-fructose mixture (MGF), a maltodextrin-glucose (MG) mixture and a placebo (P). Group A received oral MGF; Group B received oral MG; Group C received oral placebo.Results After ingestion of the mixture after exercise, the plasma glucose levels in group A and group B increased similarly during the recovery period of 30 min. Plasma glucose levels remained unchanged in group C during the recovery period. During the recovery period, the areas under the curve of Group A and Group B were higher. Compared with group C, plasma FFA levels were lower in group A and group B, and the change in recovery period was smaller (P<0.05). Conclusion Supplemental MG produces different postprandial blood glucose patterns for 60 min and 90 min of exercise. Supplementation of MGF and MG was similar in response to FFA production after exercise.In addition, early in MGF supplementation, plasma glucose levels were reduced, but this did not happen in MG supplementation.
