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- Title
Gastrointestinal discomfort during intermittent high-intensity exercise: effect of carbohydrate -- electrolyte beverage.
- Authors
Shi X; Horn MK; Osterberg KL; Stofan JR; Zachwieja JJ; Horswill CA; Passe DH; Murray R
- Abstract
This study investigated whether different beverage carbohydrate concentration and osmolality would provoke gastrointestinal (GI) discomfort during intermittent, high-intensity exercise. Thirty-six adult and adolescent athletes were tested on separate days in a double-blind, randomized trial of 6% and 8% carbohydrate-electrolytes (CHO-E) beverages during four 12-min quarters (Q) of circuit training that included intermittent sprints, lateral hops, shuttle runs, and vertical jumps. GI discomfort and fatigue surveys were completed before the first Q and immediately after each Q. All ratings of GI discomfort were modest throughout the study. The cumulative index for GI discomfort, however, was greater for the 8% CHO-E beverage than for the 6% CHO-E beverage at Q3 and Q4 (P < 0.05). Averaging across all 4 quarters, the 8% CHO-E treatment produced significantly higher mean ratings of stomach upset and side ache. In conclusion, higher CHO concentration and osmolality in an ingested beverage provokes stomach upset and side ache.
- Publication
International Journal of Sport Nutrition & Exercise Metabolism, 2004, Vol 14, Issue 6, p673
- ISSN
1526-484X
- Publication type
Journal Article
- DOI
10.1123/ijsnem.14.6.673