This investigation evaluated the Influence of beverage carbonation and carbohydrate content on fluid replacement following exercise/thermal dehydration. Eight recreationally trained men cycled at 50% of their maximal aerobic power in a hot environment (40°C 40% relative humidity) until a body weight loss of 4.12 ± 0.02% was attained. In the subsequent four hours subjects ingested one of four randomly assigned solutions at 15 minute intervals. The total volume ingested equalled that lost during dehydration. The solutions varied in their carbohydrate and carbonation content as follows: 1) CK: carbonated 10% carbohydrate solution, 2) NCK: non-carbonated 10% carbohydrate solution, 3) CNK: carbonated non-caloric solution, and 4) NCNK: non-carbonated non-caloric solution. Before dehydration and at 0, 60, 120, 180, and 240 minutes of recovery subjects performed a five minute cycling bout (SCB) at 70% venous blood samples were obtained before and after dehydration, and at 30, 90, 150, and 240 minutes of of their maximal aerobic power. In addition, resting data from the carbohydrate treatments were pooled and recovery. Rehydration evaluated from body weight, plasma volume, plasma protein, and urine volume data was not significantly (p> 0.05) different between treatments at any time. In addition, carbonated beverage (CK and CNK) ingestion did not significantly alter the pC02 or pH of venous blood at rest or the respiratory exchange ratio (RER) during exercise, however, the ingestion of carbohydrate beverages (CK and NCK) elevated the RER during the SCB relative to the level elicited by Ingestion of non-carbohydrate beverages. Oxygen consumption during the SCB at 240 minutes was significantly (p< 0.05) higher in the non-carbohydrate treatments (NCNK vs. CK and CNK and NCNK vs. NCK), however, no differences in caloric expenditure were observed. Arterialized blood lactate one minute after each SCB was not different between treatments. Lactate levels were significantly higher, however, when compared to the non-carbohydrate treatments. No significant differences were observed in ratings of perceived exertion, or ratings of gastrointestinal comfort. The results of this Investigation suggest that solutions which are carbonated and/or contain a carbohydrate concentration of 10 b are as effective as non-carbonated and/or non-carbohydrate solutions with regard to fluid replacement. In addition, the ingestion of carbonated beverages does not appear to be associated with alterations in the pC02 or pH of venous blood or gastric distress relative to the levels attained with non-carbonated beverages. / School of Physical Education
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/183934 |
| Date | January 1990 |
| Creators | Lambert, Charles Paul |
| Contributors | Ball State University. School of Physical Education., Costill, David L. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | xi, 100 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
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