Impact of carbohydrate supplementation during endurance training on glycogen storage and performance

Both training groups improved maximal oxygen uptake and peak power output by 17% on average.

• Both the glucose and placebo groups lost approximately 3 kg of fat mass after 8 weeks of training.
• Both groups exhibited a similar reduction in respiratory exchange ratio of 0.02 units during submaximal exercise.
• Beta-hydroxyacyl-CoA-dehydrogenase activity increased in both groups, but more significantly in the placebo group (45% vs 23%).
• GLUT-4 protein expression increased by 74% in the placebo group compared to 45% in the glucose group.
• Resting muscle glycogen levels increased more in the placebo group (96%) than in the glucose group (33%).

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