Dissertations and Theses @ UNI

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Open Access Thesis

Keywords

Exercise--Physiological aspects;

Abstract

The purpose of this study was to validate the Caltrac Personal Activity Monitor against directly measured energy expenditure (EE) at treadmill speeds and grades of 3 mph, 0%; 3 mph, 8%; 5 mph, 0%; and 6 mph, 0%, with Caltracs located on the dominant hip, non-dominant hip, and the waistband at center back. It was hypothesized that there would be no significant difference between Caltrac Caloric output values (with Caltracs worn at any of the locations) and EE represented by Caloric output calculated from direct oxygen consumption (V02) and respiratory quotient (RQ) measurements from a Beckman metabolic measurement cart (MMC). It was also hypothesized that there would be no significant difference in Caltrac Caloric expenditure measures when the device was worn over a hip versus the back, and that the Caltrac would be insensitive to the vertical work component associated with walking up a grade on a motor-driven treadmill. Twenty healthy subjects (10 male, 10 female), age 21-29, were tested at the four continuous workloads for 8 minutes of data collection at each workload. VO2 was determined and EE in Calories was calculated. The results of this study indicated: 1. The Caltrac, worn at either position, does not accurately measure EE during level walking at 3 mph, graded walking at 3 mph, 8%, or level jogging at· 5 mph. 2. The Caltrac, worn at either position, does accurately measure EE during level jogging at 6 mph. 3. The Caltrac is more accurate when worn over the waistband at the center of the back while walking 3 mph on the level and when worn over the non-dominant hip when jogging at 5 mph and 6 mph on the level. 4. The Caltrac, worn at either location, over-estimates EE at 3 mph, 0%, and 5 mph, 0%, for both males and females. However, at 6 mph, 0%, the Caltrac over-estimation is not statistically significant. It was concluded that the Caltrac, at either position, is a valid measure of EE while jogging 6 mph on a level treadmill. At the remaining workloads tested, the Caltrac was not a valid measure of EE at either position.

Year of Submission

1990

Degree Name

Master of Arts

Department

School of Health, Physical Education, and Leisure Services

First Advisor

William Ryan

Second Advisor

Forrest A. Dolgener

Third Advisor

Ronald Anderson

Comments

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Date Original

1990

Object Description

1 PDF file (85 leaves)

Language

en

File Format

application/pdf

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