Purpose: The purpose of this study is to determine if components of body composition differ between elite competitive older athletes and community-dwelling ambulatory controls and to examine the relationships between the components of body composition and the relationship between the components and strength.
Methods: One-hundred Senior Athletes from the 2005 National Senior Games and 86 healthy controls participated. Body composition was measured by dual-energy x-ray absorptiometry (DXA). The DXA scans provided measures of bone mineral density (BMD), bone mass, mineral free lean mass percentage (MFLP), and fat mass percentage (FMP) including regional measures (trunk, legs and arms) of body composition. Isometric strength of the quadriceps and hamstrings was measured.
Results: One factor ANOVAs (á=.05) were performed to assess regional FMP and regional MFLP. Controls had a significantly higher FMP in every body region than athletes. Athletes had a significantly higher MFLP of the arm and leg than controls. Correlational analyses (á=.05) were also performed to examine the relationship between MFLP and strength, MFLP and BMD, and FMP and BMD. Athletes had a stronger correlation between flexion strength values and MFLP of the leg and Controls showed a stronger correlation between extension strength values and MFLP of the leg. Significant correlations were found for the relationship between MFLP and BMD, with stronger correlations in the athlete group. Significant correlations between BMD and FMP were found in all regions except the trunk for all groups.
Discussion: Our predominant findings were that, as expected, all regional measures of body fat were higher in control subjects than in athletes. This study showed that all regional measures of lean muscle mass were greater in athletes than in control subjects. This indicates that physical activity may help to prevent the decrements associated with the aging process even well in to the 7th decade of life.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-07272007-191357 |
| Date | 27 September 2007 |
| Creators | Hunt, Sarah Elizabeth |
| Contributors | Fredric Goss, Ph.D., Jean L. McCrory, Ph.D., Robert Robertson, Ph.D., Susan L. Greenspan, M.D. |
| 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-07272007-191357/ |
| 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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