The primary purpose of this investigation was to determine if college age males and females (18 to 25 year old) can self-regulate exercise intensity during a 20 minute intermittent bout of aerobic exercise on the treadmill using the OMNI RPE scale. All subjects completed an estimation trial (EST) graded exercise test using the Bruce protocol to measure heart rate (HR), oxygen consumption (VO2), and rating of perceived exertion (RPE) every minute until exhaustion. Using data from the EST, target RPEs corresponding to 50% and 70% of VO2R were determined via regression analysis. A production trial (PROD) was then performed in which subjects titrated speed and grade on the treadmill to elicit the target RPEs corresponding to 50% and 70% of VO2R in counterbalance order. At an RPE corresponding to 50% of VO2R, HR and VO2 were significantly higher in the PROD compared to the EST for counterbalance order I (70% - 50%) (p less .001). However, there was no significant difference in HR and VO2 between the EST and PROD for counterbalance order II (50% - 70%) (p greater .05). When subjects exercised at an RPE corresponding to 70% of VO2R, the HR was significantly higher in the PROD compared to the EST for counterbalance order I (70% - 50%), (p less .05). However, there was no significant difference in HR between the EST and PROD trials for counterbalance order II (50% - 70%), (p greater.05). At an RPE corresponding to 70% of VO2R, there was no significant difference in the VO2 between the EST and PROD trials (p greater .05). Subjects were also able to perceptually differentiate between the two target RPEs corresponding to 50% and 70% of VO2R as indicated by the significant difference in HR (p less .05) and VO2 (p less .05) between the two prescribed PROD RPE intensities. The present investigation indicates that subjects were able to use RPE to self-regulate exercise intensity during 20 min of exercise at varying intensity when starting the exercise bout at the RPE corresponding to 50% of VO2R.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-06122007-154210 |
| Date | 27 September 2007 |
| Creators | Schafer, Mark |
| Contributors | Kevin Kim, Elizabeth Nagle-Stilly, Fredric L. Goss, Robert J. Robertson |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-06122007-154210/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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