title: Effect of maltose-containing sports drinks on exercise performance.
abstract: This study examined the effect of maltose-containing sports drinks on exercise performance. Ten subjects completed 4 trials. Each trial consisted of a glycogen depletion protocol, followed by a 15-min refueling, after which subjects performed an 1-h performance test while consuming one of the experimental drinks (HGlu, glucose; HMal, maltose; MalMix, sucrose, maltose, and maltodextrin; Plac, placebo). Drinks provided 0.65 g/kg body weight carbohydrates during refueling and 0.2 g/kg every 15 min during the performance test. Although no significant differences were found in performance (HGlu: 67.2 +/- 2.0; HMal: 68.6 +/- 1.7; MalMix: 66.7 +/- 2.0; Plac: 69.4 +/- 3.0 min, P> 0.05), subjects completed the MalMix trial 3.9%; faster than the Plac. Carbohydrate drinks caused comparable plasma glucose values that were significantly higher during refueling and at the end of exercise, compared to Plac. The data suggest that although carbohydrate drinks help to maintain plasma glucose at a higher level, no differences in performance could be detected after glycogen-depleting exercise.
authors.affiliation: Dept. of Nutrition and Diatetics, Laboratory of Nutrition & Clinical Dietetics, Harokopio University, Athens 17671, Greece.
authors.forename: Costas A
authors.initials: CA
authors.lastname: Anastasiou
authors.forename: Stavros A
authors.initials: SA
authors.lastname: Kavouras
authors.forename: Christina
authors.initials: C
authors.lastname: Koutsari
authors.forename: Charalambos
authors.initials: C
authors.lastname: Georgakakis
authors.forename: Katerina
authors.initials: K
authors.lastname: Skenderi
authors.forename: Michael
authors.initials: M
authors.lastname: Beer
authors.forename: Labros S
authors.initials: LS
authors.lastname: Sidossis
mesh_terms: D000328:Adult; D001628:Beverages; D001642:Bicycling / Q000502:physiology; D001786:Blood Glucose / Q000378:metabolism; D018592:Cross-Over Studies; D004040:Dietary Carbohydrates / Q000008:administration & dosage* / Q000378:metabolism; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005934:Glucagon / Q000097:blood; D006003:Glycogen / Q000378:metabolism; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007328:Insulin / Q000097:blood; D007773:Lactates / Q000097:blood; D008297:Male; D008320:Maltose / Q000008:administration & dosage* / Q000378:metabolism; D009132:Muscles / Q000187:drug effects / Q000378:metabolism*; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D007773:Lactates; D008320:Maltose; D006003:Glycogen; D005934:Glucagon; D006854:Hydrocortisone