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Theses/Dissertations

Kinesiology

Graduate Theses and Dissertations

Accelerometer

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Full-Text Articles in Life Sciences

Estimation Of Physical Activity Intensity Using Triaxial Actigraph Accelerometers In Youth Populations: Impact Of Data Type, Attachment Site, And Modeling Approach, Including Adaptations Of The Sojourn Method For Varied Use In Youth, Paul Hibbing Jan 2016

Estimation Of Physical Activity Intensity Using Triaxial Actigraph Accelerometers In Youth Populations: Impact Of Data Type, Attachment Site, And Modeling Approach, Including Adaptations Of The Sojourn Method For Varied Use In Youth, Paul Hibbing

Graduate Theses and Dissertations

Adequate physical activity (PA) in youth is essential for short- and long-term health. However, it is difficult to perform large-scale assessments of youth PA levels and be assured of accurate results. Recent developments in accelerometer-based PA monitoring for adults (e.g. the Sojourn method) have enhanced the accuracy attainable by those devices, but the same has not been accomplished for youth. PURPOSE: The purpose of this study was to develop and cross-validate versions of the established Sojourn method that can be used for research with youth. METHODS: The study involved two phases. In Phase 1, existing ActiGraph monitor data from ...


Validation And Calibration Of Self-Report Methods: The Youth Activity Profile, Pedro Frederico De Saint-Maurice Maduro Jan 2013

Validation And Calibration Of Self-Report Methods: The Youth Activity Profile, Pedro Frederico De Saint-Maurice Maduro

Graduate Theses and Dissertations

The development of more accurate and precise methods of assessing physical activity behavior is an important public health research priority. Objective monitoring devices have advantages but the high cost and burden of data processing make them impractical for large scale applications. Subjective (survey-based) tools are inexpensive and easy to use but these suffer from questionable validity. Objective measures are often used to validate less accurate measures such as subjective instruments but this does not directly improve the accuracy or precision of the self-report instrument. The proposed line of research developed and tested a calibration equation approach that enabled data from ...


Validity Of Consumer-Based Physical Activity Monitors And Calibration Of Smartphone For Prediction Of Physical Activity Energy Expenditure, Jung-Min Lee Jan 2013

Validity Of Consumer-Based Physical Activity Monitors And Calibration Of Smartphone For Prediction Of Physical Activity Energy Expenditure, Jung-Min Lee

Graduate Theses and Dissertations

Accelerometry-based activity monitors have become the standard objective method for assessing physical activity (PA) in field-based research [1]. They are small, non-invasive, easy-to use, and provide an objective indicator of physical activity over extended periods of time. The main advantage from a research perspective is they provide an objective indicator of physical activity behavior, thereby avoiding common sources of error in subjective measurement (e.g., self-report). Because of their storage data capacity, it is possible to monitor behavior over extended periods of time and easy to download the information to a computer for processing. Numerous studies have been published on ...


Physical Activity Levels And Cardiovascular Disease Risk Among U.S. Adults: Comparison Between Self-Reported And Objectively Measured Physical Activity, Jared Tucker Jan 2010

Physical Activity Levels And Cardiovascular Disease Risk Among U.S. Adults: Comparison Between Self-Reported And Objectively Measured Physical Activity, Jared Tucker

Graduate Theses and Dissertations

Background: In 2008, the US Department of Health and Human Services released the first set of official US physical activity guidelines (Physical Activity Guidelines for Americans - PAGA). These guidelines are based on numerous studies that have linked self-reported PA to substantial health benefits. However, levels of PA among US adults remain relatively low, and differ substantially depending upon whether measured subjectively or objectively. Therefore, a better understanding between these measures is needed. Additional evidence linking objective PA to health outcomes is also needed. Furthermore, no study has examined the proportion of Americans achieving the PAGA using an objective measure. Purpose ...