Objective measurement of physical activity remains an important challenge. For wearable monitors such as accelerometer-based physical activity monitors, more accurate methods are needed to convert activity counts into energy expenditure (EE). Purpose The purpose of this study was to examine the accuracy of the refined Crouter 2-Regression Model (C2RM) ...
The International Physical Activity Questionnaire (IPAQ-SF) has been validated and recommended as an efficient method to assess physical activity, but its validity has not been investigated in different population subgroups. We examined variations in IPAQ validity in the Hong Kong Chinese population by six factors: sex, age, job status, educational ...
Reliability and validity of accelerometer devices when used to detect differences in activity intensity and estimate energy expenditure in lean and overweight adults. Khalid S. AlJaloud, Adrienne R. Hughes, Stuart D.R. Galloway. Health and Exercise Science Research Group, School of Sport, University of Stirling, FK9 4LA. SCOTLAND, U.K. ...
Accelerometers are considered to be the most promising tool for measuring physical activity (PA) in free-living young children. So far, no studies have examined the feasibility and validity of accelerometer measurements in children under 3 years of age. Therefore, the purpose of the present study was to examine the feasibility and ...
Introduction Sitting at work is an emerging occupational health risk [1]. Few instruments designed for use in population-based research measure occupational sitting and standing as distinct behaviours [2]. The aim of this study was to develop and validate a brief measure of occupational sitting and physical activity. Methods A convenience sample (N=99, 61% ...
Introduction The MTI and GT1M (Actigraph,LLC, Florida) uniaxial accelerometers have been used interchangeably in field research, however their internal technologies are different. The GT1M detects acceleration via a polysilicon surface micromachined sensor while the MTI utilises a cantilevered beam sensor. Determining the reliability across accelerometers and the ...
This study aimed to evaluate the reliability and validity of two self-report physical activity (PA) questionnaires - the AQuAA (Activity Questionnaire for Adults and Adolescents) and PASE (Physical Activity Scale for the Elderly) - in cancer patients. Methods Test-retest reliability was determined by administering the questionnaires twice within 5 days. Intraclass ...
Background Toward stemming the rise in childhood obesity, researchers are increasingly targeting increased physical activity (PA) in very young children (i.e., 3-5 y). Interventions aimed at this age group are few but growing in number and have typically focused on evaluating changes in equipment, staff development, programs, and policies. ...
Objectives To test the validity, practical utility, and reliability of the Actigraph GT3-X accelerometer for measurement of habitual physical activity in pet dogs. Methods In the validation study, 30 dogs wore the accelerometer for 1 day while being filmed. Accelerometer and film were synchronised and 10-minute periods of the filmed records ...
Purpose To establish the validity and reliability of the GPAC for measuring physical activity and geographic location. Methods 20 subjects wore both the GRAC and an Actigraph while walking on a treadmill at 3,4, or 5 mph in a randomized order. In addition 24 subjects were asked to wear the GPAC and to record ...