title: Effect of carbohydrate ingestion subsequent to carbohydrate supercompensation on endurance performance.
abstract: This investigation determined whether carbohydrate ingestion during prolonged moderate-intensity exercise enhanced endurance performance when the exercise was preceded by carbohydrate supercompensation. Seven male trained cyclists performed two trials at an initial power output corresponding to 71 +/- 1% of their peak oxygen consumption. During the trials, subjects ingested either a 6% glucose/sucrose (C) solution or an equal volume of artificially flavored and sweetened placebo (P) every 20 min throughout exercise. Both C and P were preceded by a 6-day carbohydrate supercompensation procedure in which subjects undertook a depletion-taper exercise sequence in conjunction with a moderate- and high-carbohydrate diet regimen. Statistical analysis of time to exhaustion, plasma glucose concentration, carbohydrate oxidation rate, fat oxidation rate, and plasma glycerol concentration indicated that in spite of a carbohydrate supercompensation procedure administered prior to exercise, carbohydrate ingestion during exercise can exert an additional ergogenic effect by preventing a decline in blood glucose levels and maintaining carbohydrate oxidation during the later stages of moderate-intensity exercise.
authors.affiliation: Department of Health and Exercise Sciences, Rowan College of New Jersey, Glassboro 08028, USA.
authors.forename: J
authors.initials: J
authors.lastname: Kang
authors.forename: R J
authors.initials: RJ
authors.lastname: Robertson
authors.forename: B G
authors.initials: BG
authors.lastname: Denys
authors.forename: S G
authors.initials: SG
authors.lastname: DaSilva
authors.forename: P
authors.initials: P
authors.lastname: Visich
authors.forename: R R
authors.initials: RR
authors.lastname: Suminski
authors.forename: A C
authors.initials: AC
authors.lastname: Utter
authors.forename: F L
authors.initials: FL
authors.lastname: Goss
authors.forename: K F
authors.initials: KF
authors.lastname: Metz
mesh_terms: D000328:Adult; D001642:Bicycling; D001786:Blood Glucose / Q000378:metabolism; D050260:Carbohydrate Metabolism; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D015444:Exercise / Q000502:physiology; D005990:Glycerol / Q000097:blood; D006801:Humans; D007700:Kinetics; D008297:Male; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology*
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates; D005990:Glycerol