Effects of carbonated and noncarbonated beverages at specific intervals during treadmill running in the heat.

G. Patrick Lambert, T. L. Bleiler, R. T. Chang, A. K. Johnson, C. V. Gisolfi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)177-193
Number of pages17
JournalInternational Journal of Sport Nutrition
Volume3
Issue number2
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

Fingerprint

Carbonated Beverages
Beverages
exercise equipment
beverages
Hot Temperature
heat
thirst
Thirst
osmolality
Osmolar Concentration
high fructose corn syrup
carbonation
Glucose
sweat
glucose
Sweat
thermoregulation
Sucrose
heart rate
homeostasis

All Science Journal Classification (ASJC) codes

  • Food Science
  • Medicine (miscellaneous)
  • Endocrinology
  • Public Health, Environmental and Occupational Health

Cite this

Effects of carbonated and noncarbonated beverages at specific intervals during treadmill running in the heat. / Lambert, G. Patrick; Bleiler, T. L.; Chang, R. T.; Johnson, A. K.; Gisolfi, C. V.

In: International Journal of Sport Nutrition, Vol. 3, No. 2, 01.01.1993, p. 177-193.

Research output: Contribution to journalArticle

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