Publication Date

1989

Document Type

Dissertation/Thesis

First Advisor

Ball, Thomas E.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Physical Education

LCSH

Exercise--Physiological aspects; Alkalosis; Exercise for women

Abstract

Twelve moderately trained females (mean V̇O₂ [sub peak] = 40.02 ml·kg⁻¹·min⁻¹) participated in identical exercise tests after ingestion of .1 g·kg⁻¹ body weight (BW) of NaHCO₃, .2 g·kg⁻¹ BW of NaHCO₃, or a CaCO₃ placebo. Subjects exercised for 5 min at both 30% V̇O₂ [sub peak] and 50% V̇O₂ [sub peak], followed immediately by 1-min bouts at 110% V̇O₂ [sub peak], spaced with 1-min passive rest periods. Intervals were continued to volitional fatigue. Mean total exercise times to exhaustion during the 110% exercise bouts were 133.9 ± 83.3 s, 162.4 ± 107.3 s, and 129.4 ± 104 s; mean change in blood lactate from preexercise to 5 min postexercise were 9.83 ± 1.76 mmol·L⁻¹, 10.9 ± 2.04 mmol ± L⁻¹, and 10.9 ± 3.18 mmol·L⁻¹; mean rate of perceived exertion (RPE) ratings were 8.4 ± 1.4, 8.7 ± 1.1, and 8.7 ± 1.1, respectively, for .1 g·kg⁻¹ BW NaHCO₃, .2 g·kg⁻¹ BW NaHCO₃, and the placebo. Repeated measures ANOVA revealed significant differences (p̲ < .05) in the mean exercise times, but no significant differences for RPE or blood lactate. Tukey HSD post hoc analysis revealed that subjects exercised significantly longer following ingestion of .2 g·kg⁻¹ BW, as compared to both .1 g·kg⁻¹ BW and placebo conditions. The findings of this study show that a NaHCO₃ dosage of .2 g·kg⁻¹ BW is effective in improving performance during short-duration, high- intensity work for moderately trained females.

Extent

iv, 37 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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