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% V̇O2max followed by a time-to-exhaustion (TE) ride at 100% V̇O2max. 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 ob-· served for insulin and lactate. An increase in TE (min) at 100% V̇O2max 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.
L.L. Frank is the Director of Research at the American Institute for Biosocial and Medical Research, P.O. Box 1174, Tacoma, WA 98401. J.T. Baer is with the Department of Health and Sport Sciences at the University of Dayton, Dayton, OH 45469. C.P. Lambert is with the University of Arkansas for Medical Sciences, Little Rock, AR 72205. M.L. Anderson is the Director of Research & Development at Triarco Industries, 400 Hamburg Turnpike, Wayne, NJ 07470.