Publication Date

1997

Document Type

Dissertation/Thesis

First Advisor

Ball, Thomas E.

Degree Name

M.S. Ed. (Master of Education)

Legacy Department

Department of Physical Education

LCSH

Cross-country running--Psychological aspects; Caffeine--Psychological effect; Women athletes--Physiology

Abstract

Eight trained (mean VO[sub 2] max = 56.4 ml kg^-1 min^-1 ± 6.1) collegiate female crosscountry runners (ages 18-26) ran two ten-mile treadmill runs (70% of VO[sub 2] max) after ingestion of caffeine (5 mg kg bw^-1, CAF trial) or a placebo (2 mg kg- bw^-1 PLA trial) lemonade solution. Respiratory exchange ratio (RER), blood glucose, and blood triglyceride levels were measured. Three of the subjects were dropped from all statistical analyses due to unreadable glucose blood samples. There were no changes in mean blood glucose and triglyceride levels of the CAF trials when compared to PLA trials(23.8 mg dL^-1 ± 24.7 vs. 11.6 mg dL^-1 ± 19.4 for glucose and 24.3 mg dL^-1 + 17.2 vs. 26.2 mg dL^-1 ± 17.9 for triglycerides). The mean RER recordings exhibited no change (first sample to last sample expressed in percent change) when comparing CAF to PLA trials (CAF RER = 7.20% ± 5.17 and PLA RER = 6.60% ± 2.95). A Wilcoxon nonparametric test was used to analyze RER percent changes, blood triglyceride and glucose measurements. Wilcoxon Matched-Pairs Signed-Ranks Test displayed no significant results between PLA trial and CAF trial with a Z = -.4045 for RER, Z = - 1.2136 and Z = -.4045 for glucose and triglycerides respectively. The results of this investigation illustrate that there is no ergogenic effects of a 5 mg kg bw^-1 dose of caffeine on RER, blood glucose levels, or blood triglyceride levels in female collegiate runners.

Comments

Includes bibliographical references (pages [27]-30)

Extent

63 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

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Text

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