Results Search Electronic Theses and Dissertations (ETDs)

Influence of pedometer tilt angle on step counting validity during controlled treadmill walking trials: Author: Dock, Melissa; Date: 2008-05-15; Program: Health and Human Development; Abstract: Pedometers are tools frequently used to monitor walking-related physical activity patterns of overweight and obese populations. However, there is a known association between increasing body mass index (BMI) and decreasing pedometer accuracy. The decrease in pedometer accuracy has been attributed to tilt angle, but the specific tilt angle where pedometers fail to maintain accuracy is unclear. PURPOSE: The purpose of this study was to test two popular pedometer mechanisms, accelerometry- and pendulum-based, to determine the specific tilt angle where the pedometers fail to maintain step counts ac...; Download File | View full details

The influence of bout interruptions on measured and predicted physical activity during treadmill walking and running: Author: Howe, Stephanie Marie; Date: 2008-05-15; Program: Health and Human Development; Abstract: The importance of daily physical activity (PA) has been established as a means of decreasing risk for chronic diseases. However, the presence of bout interruptions ((BI), defined as a brief pause (< 2 min) PA), can complicate measures of PA. This study was designed to evaluate the influence of different BI rules on PA during treadmill locomotion. Fifteen runners (6 women, 9 men) completed a series of walking (53.6, 107.2 m/min) and running (160.8 m/min) trials while using a metabolic measurement system to measure actual activity energy expenditure (AEEA) and four activity monitors to measur...; Download File | View full details