자료유형  

 학위논문

Control Number  

0016932254

International Standard Book Number  

9798380326186

Dewey Decimal Classification Number  

612

Main Entry-Personal Name  

Metoyer, Casey.

Publication, Distribution, etc. (Imprint  

[S.l.] : The University of Alabama., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(93 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-03, Section: A.

General Note  

Advisor: Esco, Michael R.;Fedewa, Michael V.

Dissertation Note  

Thesis (Ph.D.)--The University of Alabama, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약A smartphone application was recently developed that measures body composition from a 2-dimensional image of a standing person (%FatIMAGE). Three experiments were performed to 1) determine the reliability of %FatIMAGE in two different body positions and days, 2) determine the reliability of %FatIMAGE across different cameras, room lighting levels, and colored backgrounds, and 3) assess the potential sources of error related to %Fat estimation with bioimpedance, skinfold, and IMAGE. In the first study, %FatIMAGE was measured in the anterior (ANTDay1) and posterior (POSTDay1) positions, then again within 48 hours of the first visit (POSTDay2). The ANTDay1 was significantly lower compared to the reference, whereas the POSTDay2 was not. In the second study, %FatIMAGE was estimated in different megapixel cameras (12MP, 8MP, 5MP, and 0.7MP), different room lighting conditions (i.e., low=LL, medium=ML, ambient=AL, and bright light=BL), and different colored backgrounds (White=WB, Black=BB, Green=GnB, Orange=OB, and Gray=GyB). Conditions were compared to a reference (8MP, AL, and WB). The 0.7MP was significantly higher than the reference, whereas the 12MP and 5MP were not. The LL was significantly higher than the reference, whereas the BL and ML were not. The BB, GnB, and GyB were significantly higher than the WB, whereas the OB was not. In a third study, %Fat was measured via bioimpedance, skinfold, %FatIMAGE, and a criterion 4- compartment model. The constant error (CE) was calculated (%Fat condition - criterion) for each method (SKFERROR,BIAERROR., and IMAGEERROR). The CE was correlated with markers of physical activity (PA) and muscular fitness (MF): the International physical activity questionnaire (IPAQT, IPAQV, IPAQM); Perceived functional ability questionnaire (1mileSUB and 3mileSUB); Physical Activity Rating questionnaire (PA-R): handgrip test (HG); and push-up test (PU). SKFERROR displayed a small correlation with PU, while IPAQV, 1mileSUB, 3mileSUB, PA-R, and PU were associated with IMAGEERROR. Regression analyses indicated that only PU contributed to the model for SKFERROR and IMAGEERROR. In conclusion, the IMAGE produced acceptable reliability across different camera, lighting, and background conditions but attention should be paid to clothing color in contrast with background color. In addition, further evaluation of MF measures is recommended, as higher PU were associated with greater IMAGEERROR.

Subject Added Entry-Topical Term  

Kinesiology.

Subject Added Entry-Topical Term  

Biomedical engineering.

Subject Added Entry-Topical Term  

Web studies.

Index Term-Uncontrolled  

Body composition

Index Term-Uncontrolled  

Image

Index Term-Uncontrolled  

Prediction rrror

Index Term-Uncontrolled  

Reliability

Index Term-Uncontrolled  

Smartphone application

Index Term-Uncontrolled  

Technology

Added Entry-Corporate Name  

The University of Alabama Human Performance

Host Item Entry  

Dissertations Abstracts International. 85-03A.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:639330