Research Database

184 results for "Validation"

Estimating Physical Activity Using the CSA Accelerometer and a Physical Activity Log

  • Published on 09/2003

Purpose To compare two methods for measuring time spent in physical activity of differing absolute intensities. Methods Over a 7-d period, 59 women wore Computer Science and Applications, Inc. (CSA) accelerometers and recorded their activity in physical activity logs (PAL) at 15-min intervals. Three published cut points were used to classify ...


Development and Validation of a Pregnancy Physical Activity Questionnaire

  • Published on 10/2004

Purpose The effect of physical activity during pregnancy on maternal and fetal health remains controversial and studies have yet to identify the optimal dose of physical activity associated with favorable pregnancy outcomes. The aim of this study was to develop and validate a pregnancy physical activity questionnaire (PPAQ). Methods To ...


Detecting Bouts of Physical Activity in a Field Setting

  • Published on 1999

The purposes of this study were to assess the TRITRAC and CSA for: (a) interaccelerometer agreement; (b) agreement in detecting patterns of moderate-intensity physical activity; and (c) agreement in detecting walking patterns recorded in a diary. Thirty-one women wore both the TRITRAC and CSA accelerometers for three consecutive days. Interaccelerometer ...



A Comparative Evaluation of Three Accelerometry-Based Physical Activity Monitors

  • Published on 09/2000

Purpose Accelerometry-based activity monitors offer promise for the assessment of free-living physical activity. They provide an objective record of frequency, intensity, and duration of physical activity with minimal burden on participants. The purpose of this study was to evaluate the absolute and relative validity of three contemporary activity monitors (Computer ...


Comparison of PAEE from Combined and Separate Heart Rate and Movement Models in Children

  • Published on 10/2007

Purpose Accurate measurement of physical activity in children is a challenge. Combining physiological (e.g., heart rate (HR)) and body movement registration (e.g., accelerometry) may overcome limitations with either method used alone. This study aimed to compare the estimated physical activity energy expenditure (PAEE) from hip- and ankle-mounted MTI ...


Convergent Validity of 3 Low Cost Motion Sensors With the ActiGraph Accelerometer

  • Published on 09/07/2010

Background This study evaluated the utility of several lower cost physical activity (PA) assessment instruments for detecting PA volume (steps) and intensity (time in MVPA or activity time) using convergent methods of assessment. Methods Participants included 26 adults (9 male) age 27.3 ± 7.1 years with a BMI of 23.8 ± 2.8 kg/m2. Instruments evaluated included the ...


The Accuracy of the Accelerometers (Actical and Actigraph) Among Korean People

  • Published on 09/28/2008

Background Nowadays, decreased physical activity is considered to be a contributor to increase the prevalence of many diseases such as obesity, coronary heart disease and so on. Many researches demonstrated that regular physical activity reduce all cause mortality. To increase the physical activities of the population, accurate estimation of the ...



Comparison of Two Approaches to Structured Physical Activity Surveys for Adolescents

  • Published on December 2004

Purpose To compare the test-retest reliability, convergent validity, and overall feasibility/usability of activity-based (AB) and time-based (TB) approaches for obtaining self-reported moderate-to-vigorous physical activity (MVPA) from adolescents. Methods Adolescents (206 females and 114 males) completed two 3-d physical activity recalls using the AB and TB surveys, which contained identical lists of ...