Effects of dehydration on gastric emptying and gastrointestinal distress while running.

摘要: Gastrointestinal distress is commonly reported by athletes after ingestion of a beverage. We speculate that may be occurring dehydration has taken place. The high prevalence GI disorders in marathon runners who have lost greater than or equal to 4% body weight supports this theory. To test theory, the effects dehydration, and combination with endurance running, on gastric emptying (GE) frequency gastrointestinal (GI) complaints were tested experiment. A complete cross-over study was designed. Sixteen subjects ingested 8 ml.kg BW-1 7% carbohydrate (296 mOsm.kg-1), solution euhydration regime. Dehydration (4% BW loss) produced 60% maximal speed running at 30 degrees C intermittent sauna exposure 100 C. Euhydration experiments conducted 2 h rest period water administered 20 40 min. Gastric drink volumes measured every 10 min for Emptying curves compared using semi-log transformation percentage data simple linear regression. slope each line used as measure average GE rate. Dehydration-exercise resulted slower all other treatments (P less 0.05). ANOVA revealed significant 0.05) exercise 0.05), these two being additive delaying GE. 37.5% during dehydration-exercise experiments. No disturbance tests.(ABSTRACT TRUNCATED AT 250 WORDS)