Publication Date


Document Type


First Advisor

Ball, Thomas E.

Degree Name

M.S. Ed. (Master of Education)

Legacy Department

Department of Physical Education


Adenosine triphosphate; Dietary supplements; Cyclists--Nutrition; Cyclists--Drug use


Eight male competitive cyclists (age = 26 + 4.93 yrs.) took part in three twenty-kilometer simulated time trials on a Schwinn Velodyne indoor trainer. The first test was a control time trial. With the second and third tests, the cyclists took either CAPS Enerzymes ergogenic aid or a placebo. The order of supplementation was randomly assigned. The dependant variable of time to completion for the control, CAPS, and placebo time trials were 2016.7 (± 120.1), 1939 (± 62.1), and 2053.2 (± 131.0) seconds respectively. A one-way repeated measures ANOVA showed that there was a statistically significant difference in time to completion for the three conditions (p = .05). When further tested with the Tukey's Post Hoc (113.31 seconds), only the time to completion between the CAPS and placebo time trials were significantly different (114.25 seconds). Seven out of eight subjects performed better using CAPS in time to completion between the control and CAPS trials with a mean improvement of 77 seconds for the CAPS supplementation. Time to completion between the control and placebo trials showed a 36-second difference (performance decrement) for the placebo supplementation. Neither of these two time differences met the 113.31 time requirement and are therefore not statistically significant. Based on the results of the inferential statistics, it not possible to conclude that CAPS Enerzymes work on any other group of cyclists. There was a design problem in losing five out of the original thirteen subjects. Also, the study was not truly double-blind due to a size and color difference between the placebos and CAPS Enerzymes. It was determined that at least two out of eight subjects recognized which supplement they were taking. The manufacturer originally stated that they were going to supply placebos that had the same appearance as CAPS Enerzymes but failed to do so. This made the double-blind protocol ineffective.


Includes bibliographical references.


45 pages




Northern Illinois University

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