Dissertations and Theses @ UNI


Open Access Thesis


Carbonated beverages--Physiological effect; Oxygen--Physiological transport; Running--Physiological aspects;


The purpose of this study was to examine the effect of consumption of carbonated beverages on maximal aerobic capacity, as measured by maximal oxygen consumption (VO2MAX), and respiratory physiology, as measured by ventilation frequency (f), ventilatory equivalent for oxygen and carbon dioxide (O2VE, co2VE), expired minute ventilation (VE), carbon dioxide output (VCO2), respiratory exchange ratio (RER), and tidal volume (VT).

Thirteen male high school, collegiate and post collegiate distance runners from the local community performed two maximal treadmill tests exactly one week apart, following two different fluid ingestion treatments. The subjects were randomly assigned to a carbonated beverage or noncarbonated beverage treatment to which they adhered for the first week. They were then tested on the second protocol the following week. The subjects were to ingest a minimum of 24 ounces of a caffeine-free and sugar-free carbonated beverage per day for the entire week for the carbonation protocol. For the noncarbonation protocol, the subjects were not to ingest any beverage with carbonation for the duration of the week, but were to consume a minimum of 24 ounces of fluid per day of noncaffeinated fluids. Following each protocol subjects were administered a treadmill test from which VO2MAX and other respiratory variables were determined.

A repeated measures t test was used to determine significance of the data. The values obtained indicated that there was no significant difference (p>.05) between the noncarbonated and carbonated values for all the variables tested. Though not statistically significant, the mean values for VO2MAX were lower and the ventilation frequency was higher after the carbonation treatment. The results of this study suggest that an ingested amount of carbonation does not significantly affect maximal oxygen consumption or maximal respiratory values in trained male distance runners.

Year of Submission


Degree Name

Master of Arts

First Advisor

William Ryan

Second Advisor

Forrest Dolgener

Third Advisor

Sue Joslyn


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Date Original


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