Journal article
Effects of Carbonated and Noncarbonated Beverages at Specific Intervals during Treadmill Running in the Heat
International journal of sport nutrition, Vol.3(2), pp.177-193
06/1993
DOI: 10.1123/ijsn.3.2.177
PMID: 8508195
Abstract
Eight male runners performed four 2-hr treadmill runs at 65% ~ 0 , m a x in the heat (35"C, 15-20% RH). A different beverage was offered each trial and subjects drank ad libitum for 2 min every 20 min. The beverages were, 6% carbohydrate (CHO) solution (NC 6), 6% carbonated-CHO solution (C 6), 10% CHO solution (NC 10), and 10% carbonated-CHO solution (C 10). NC 6 and C 6 contained 4% sucrose and 2% glucose. NC 10 and C 10 contained high fructose corn syrup. Subjects drank more NC 6 than C 6. Fluid consumption was not different among other trials. During all trials, volume consumed and %ΔPV declined while heart rate and rectal temperature increased (p<0.05). No significant differences occurred between beverages for these variables. Percent body weight lost was greater (p<0.05) for the C 10 trial compared to the NC 6 trial. Neither sweat rate, percent fluid replaced, plasma [Na+], [K+], osmolality, percent of drink volume emptied from the stomach, or glucose concentration differed among trials. Plasma [K+] and osmolality increased (p<0.05) over time. Ratings of fullness and thirst were not different among beverages, although both perceptions increased (p<0.05) with time. It is concluded that (a) carbonation decreased the consumption of the 6% CHO beverage; (b) fluid homeostasis and thermoregulation were unaffected by the solutions ingested; and (c) fluid consumption decreased with time, while ratings of fullness and thirst increased.
Details
- Title: Subtitle
- Effects of Carbonated and Noncarbonated Beverages at Specific Intervals during Treadmill Running in the Heat
- Creators
- G. Patrick LambertTimothy L BleilerRay-Tai ChangAlan K JohnsonCarl V Gisolfi
- Resource Type
- Journal article
- Publication Details
- International journal of sport nutrition, Vol.3(2), pp.177-193
- DOI
- 10.1123/ijsn.3.2.177
- PMID
- 8508195
- ISSN
- 1050-1606
- Language
- English
- Date published
- 06/1993
- Academic Unit
- Psychological and Brain Sciences; Neuroscience and Pharmacology; Health and Human Physiology
- Record Identifier
- 9984213264802771
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