title: The effects of a pre-exercise feeding with or without fungal carbohydrases (Carbogen) on blood parameters and exercise performance in elite cyclists: a preliminary study.
abstract: The effect of fungal carbohydrases (Carbogen[C]) consumed with a meal replacement bar (MBR) on glucose metabolism and exercise performance was determined in 5 male competitive cyclists. After a 12-hour fast, subjects performed two 60-min cycling bouts at 80% VO2max followed by a time-to-exhaustion (TE) ride at 100% VO2max. One hour prior to each cycling bout, subjects ingested a MRB + 160-mg C or 160-mg CaCO3 placebo (PL) in a double-blind, counterbalanced fashion. Blood was drawn for determination of glucose, insulin, and lactate at: fasting, 1 hour post-feeding, minutes 30 and 60 of exercise, and after TE. Two-way ANOVA revealed a significant (p <.05) treatment and time effect for glucose, with C being higher than PL. Interaction effects were observed for insulin and lactate. An increase in TE (min) at 100% VO2max was observed in the C versus PL trial (6.3 3.4 vs. 4.4 2.9, p <.001). A MRB+C may benefit cyclists due to increased BG and improved exercise performance.
authors.affiliation: American Institute for Biosocial and Medical Research, PO Box 1174, Tacoma, WA 98401, USA.
authors.forename: Laura Lewis
authors.initials: LL
authors.lastname: Frank
authors.forename: Janine T
authors.initials: JT
authors.lastname: Baer
authors.forename: Charles P
authors.initials: CP
authors.lastname: Lambert
authors.forename: Mark
authors.initials: M
authors.lastname: Anderson
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001642:Bicycling / Q000502:physiology*; D001786:Blood Glucose / Q000378:metabolism*; D004040:Dietary Carbohydrates / Q000008:administration & dosage / Q000378:metabolism; D004311:Double-Blind Method; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006026:Glycoside Hydrolases / Q000008:administration & dosage / Q000378:metabolism* / Q000493:pharmacokinetics; D006801:Humans; D007328:Insulin / Q000097:blood; D007773:Lactates / Q000097:blood; D008297:Male; D005082:Physical Exertion
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates; D007328:Insulin; D007773:Lactates; D006026:Glycoside Hydrolases; C019822:carbohydrase