The effects of various intensities of exercise on post-exercise resting metabolic rate

Author

Helen G. Seay

Date of Award

8-1989

Degree Type

Thesis

Degree Name

Master of Science

Major

Kinesiology

Major Professor

Edward T. Howley

Committee Members

Jean Lewis, Wendy J. Bubb

Abstract

The purpose of this study was to determine the effect of exercise performed at 60% and 80% maximal oxygen uptake on the post-exercise resting metabolic rate when total work was controlled for all subjects. Five females and three males volunteered as subjects. On a non-exercise day, each subject participated in a resting metabolic rate (RMR) test. Following a 30 minute rest period, expired gas was analyzed for O₂ and CO₂ and ventilation volumes were measured. Prior to each exercise bout and following a 4 hour fast, a 30 minute RMR was measured. On two separate exercise days, each subject ran on a treadmill for a distance of 2 miles at 60% and 80% VO₂ max. Following the exercise bout, the post-exercise metabolic rate was measured for 2 hours. Eight 15 minute samples of expired air were collected and analyzed.

No significant differences were observed in the RMR when comparisons were made between the non-exercise day and the pre-exercise RMR prior to performing exercise at 60% and 80% VO₂ max (P = .99). No significant differences were revealed when the 2 hour post-exercise caloric expenditure was compared following exercise at 60% and 80% VO₂ max (P = .81). When total resting caloric expenditure for 2 hours on the non-exercise day was compared to 2 hours post-exercise at 60% and 80% VO₂ max, no significant difference was observed (P = .74). Statistical analysis indicated no significant differences between the pre-exercise and post-exercise RMR within each exercise intensity at any of the eight collection periods. There were also no significant differences in post-exercise RMR at any of the eight collection periods when comparing exercise at 60% and 80% VO₂ max.

It was concluded that EPOC was similar following exercise performed at 60% and 80% VO₂ max and of equal total work. Also, EPOC was of short duration following the two exercise intensities. The post-exercise caloric expenditure was not of significant magnitude to make a significant contribution to weight control.

Recommended Citation

Seay, Helen G., "The effects of various intensities of exercise on post-exercise resting metabolic rate. " Master's Thesis, University of Tennessee, 1989.
https://trace.tennessee.edu/utk_gradthes/13073