The Effects of AccessTM Bar Supplementation on Aerobic Endurance

Publication Date


Type of Culminating Activity


Degree Title

Masters of Science in Exercise and Sport Studies



Major Advisor

Werner Hoeger


Chad Harris


Ronald Pfeiffer


The purpose of study was to determine if ingestion of the AccessTM Fat Conversion Bar prior to aerobic exercise would increase aerobic capacity and fat utilization, as per manufacturer’s claims. In this study the AccessTM bar was compared to a bar of equal macronutrient and caloric value, MyoplexTM Lite bar, and a non-caloric placebo, water. It was hypothesized that the AccessTM bar would not improve aerobic capacity above the other two conditions. Twelve subjects (10 male, 2 females) participated in this study. Aerobic endurance was measured by the total exercise time on a maximal graded exercise treadmill test, while fat utilization was measured by the respiratory exchange rate (RER) at 60% of the subject’s VO2max. The three supplements AccessTM bar (A), MyoplexTM Lite (M), and water (W) were administered one hour prior to each treadmill test, with one day of rest given between tests. The effects of the three independent variables on each subject’s performance during each condition were compared. A repeated measures design was used to analyze the data. The design was counterbalanced to ensure that the order of the treatment did not affect the results. The results showed that aerobic capacity, as measured by total exercise time, was similar in all three treatments; (A) X = 15.98min ± 3.3, (M) X = 16.6min ± 3.0 and (W) X = 15.89min ± 3.3. there was no significant difference (p ≥ .05) observed in total exercise time between the three trials completed. The results also showed that the AccessTM bar did not improve the ability of the subjects to utilize fat as an energy substrate, as measured by RER at 60% VO2max. There was no significant difference (p ≥ .05) between RER values; (A) X = .92 ± .08, (M) X = .92 ± .06, and (W) X = .92 ± .06 at 60% VO2max. These data supported the hypotheses that the AccessTM bar would not enhance aerobic endurance or fat utilization.

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