PMID- 8508195 OWN - NLM STAT- MEDLINE DCOM- 19930715 LR - 20191101 IS - 1050-1606 (Print) IS - 1050-1606 (Linking) VI - 3 IP - 2 DP - 1993 Jun TI - Effects of carbonated and noncarbonated beverages at specific intervals during treadmill running in the heat. PG - 177-93 AB - Eight male runners performed four 2-hr treadmill runs at 65% VO2max in the heat (35 degrees 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 % delta PV 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 thermo-regulation were unaffected by the solutions ingested; and (c) fluid consumption decreased with time, while ratings of fullness and thirst increased. FAU - Lambert, G P AU - Lambert GP AD - Department of Exercise Science, University of Iowa, Iowa City 52242. FAU - Bleiler, T L AU - Bleiler TL FAU - Chang, R T AU - Chang RT FAU - Johnson, A K AU - Johnson AK FAU - Gisolfi, C V AU - Gisolfi CV LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Int J Sport Nutr JT - International journal of sport nutrition JID - 9307702 RN - 0 (Blood Glucose) RN - 9NEZ333N27 (Sodium) RN - RWP5GA015D (Potassium) SB - IM MH - Adult MH - Blood Glucose/metabolism MH - Body Temperature Regulation MH - *Carbonated Beverages MH - Gastric Emptying MH - Heart Rate MH - Homeostasis MH - *Hot Temperature MH - Humans MH - Male MH - Osmolar Concentration MH - Plasma Volume MH - Potassium/blood MH - Running/*physiology MH - Sodium/blood EDAT- 1993/06/01 00:00 MHDA- 1993/06/01 00:01 CRDT- 1993/06/01 00:00 PHST- 1993/06/01 00:00 [pubmed] PHST- 1993/06/01 00:01 [medline] PHST- 1993/06/01 00:00 [entrez] AID - 10.1123/ijsn.3.2.177 [doi] PST - ppublish SO - Int J Sport Nutr. 1993 Jun;3(2):177-93. doi: 10.1123/ijsn.3.2.177.