Date of Award

12-2005

Degree Name

Master of Arts

Department

Health, Physical Education & Recreation

First Advisor

Dr. Christopher C. Cheatham

Second Advisor

Dr. Timothy J. Michael

Third Advisor

Dr. Michael G. Miller

Access Setting

Masters Thesis-Open Access

Abstract

The purpose of this study was to examine the exercise variables of intensity and duration in relation to PV expansion during an acute bout of exercise, when the total amount of work performed was kept constant. Six male subjects completed a maximal graded exercise test and three two-day experimental trials. During the experimental trials, each subject performed one of three exercise protocols on a cycle ergometer: 50% VO2peak (60 minutes), 65% VO2peak (45 minutes), and 80% VO2peak (30 minutes). Measurements of hematocrit, hemoglobin, and serum albumin and total protein concentrations were obtained before exercise (BASE), immediately post-exercise (Post-EX), 2-hours post-exercise (2-hr REC), and 24-hours post-exercise (24-hr REC). Although none of the protocols resulted in PV expansion 24-hr post-exercise, the highest intensity/shortest duration protocol (80% VO2peak) resulted in the greatest recovery in PV after the post-exercise decline and the 65% and 80% VO2peak protocols resulted in the greatest increase in serum albumin concentration from Post-Ex to 24-hr REC. This data suggests that higher intensity exercise may result in a more beneficial PV response compared to lower intensity exercise even when the total amount of work is kept constant.

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