Metabolic Responses When Different Forms of Carbohydrate Energy Are Consumed during Cycling

in International Journal of Sport Nutrition and Exercise Metabolism
Restricted access

Purchase article

USD $24.95

Student 1 year subscription

USD $87.00

1 year subscription

USD $116.00

Student 2 year subscription

USD $165.00

2 year subscription

USD $215.00

This study examined the effects of consuming the same amount of carbohydrate in solid form, liquid form, or both on metabolic responses during 2 hrs of cycling at 70% peak VO2 and on cycling time-trial performance. Subjects consumed 0.4 g carbohydrate/kg body mass before and every 30 min during exercise. The liquid was a 7% carbohydrate-electrolyte beverage and the solid was a sports bar (1171 kJ) in which 76%, 18%, and 6% of total energy was derived from carbohydrate, fat, and protein, respectively. Blood obtained at baseline, before exercise, and every 30 min was analyzed for glucose, insulin, lactate, hemoglobin, hematocrit, and plasma volume. There were no differences among the treatments for the blood parameters. Total carbohydrate oxidation and time-trial performance were also similar among treatments. Under thermoneutral conditions with equal liquid inges-tion, the metabolic and performance responses are similar when consuming carbohydrate as a liquid, solid, or in combination during prolonged, moderate intensity cycling.

Supported by a grant from Ross Laboratories, Columbus, OH.

The authors are with the Exercise Physiology Laboratory, School of Health, Physical Education & Recreation, The Ohio State University, Columbus, OH 43210. Garleb is also with Ross Laboratories.

International Journal of Sport Nutrition and Exercise Metabolism
Article Metrics
All Time Past Year Past 30 Days
Abstract Views 21 21 8
Full Text Views 0 0 0
PDF Downloads 0 0 0
Altmetric Badge
PubMed
Google Scholar
Cited By