Background: The General Practice Physical Activity Questionnaire (GPPAQ) is a screening tool developed by the National Health Service for use by general practitioners to assess physical activity (PA) levels of patients during clinical visits. Presently, it is not well understood if the GPPAQ classifications (active, moderately active, moderately inactive ...
Background: The International Physical Activity Questionnaire (IPAQ) is one of the most widely used questionnaires to assess self-reported physical activity (PA). However, few studies have compared IPAQ-data with maximal oxygen uptake (VO2max), waist circumference (WC) and accelerometer-measured PA, which all are significant predictors of health risks. Purpose: To ...
Purpose: Currently, there are no methods to distill information from the most widely used wrist-mounted accelerometer. A field-based calibration study was conducted in order to determine cut point thresholds for this wrist-mounted accelerometer in children aged 8-12 years. Methods: Forty-five children (25 developmental; 20 cross validation) aged 8-12 years, performed up to ...
Purpose: The purpose of this study was to develop and validate physical activity (PA) cut-points for wrist (WR) and ankle (AK) accelerometer placements in youth. Methods: : For cut-point development 84 girls and 97 boys (mean ± SD; age, 12.0 ± 1.5 yrs) completed 30 min of lying rest and two to seven structured activities (from a list ...
Purpose/Objectives & Rationale: To compare step count accuracy of ActiGraph GT3X+ monitors (hip and ankle placement) with the StepWatch 3 in geriatric in-patients. Relevance: The StepWatch 3 activity monitor is the gold standard for detecting steps in individuals who walk very slowly. However, because the ActiGraph GT3X+ monitor is ...
Objective: To assess the validity of the Global Physical Activity Questionnaire (GPAQ) for measuring sedentary behaviour (SB) in the Chilean adult population. Methods: 204 adults (88/116 male/female, 45.2±14.0) who were randomly selected during National Health Survey 2009-2010 completed the protocol. The participants wore an Actigraph GT3X (AG) for at least 7 consecutive ...
Aim: To assess the criterion validity of the ActiGraph inclinometer algorithm for detecting sitting and standing postures when worn on the thigh and waist. Methods: Thirty-nine adults (46% female, age: 31.0±8.8 years, BMI: 26.7±5.0 kg/m2) were directly observed whilst participating in a range of sedentary (typing on a computer, watching television, playing ...
Purpose: Impact loading of bone is thought to be an important prevention for osteoporosis throughout life. The purpose of this study was to assess validity of accelerometers that provide raw acceleration signals with ground reaction force (GRF) for daily physical activities in children. Understanding error of these devices is a ...
Objective: In order to determine Physical Activity (PA) levels under a health enhancing perspective, Physical activity questionnaires (PAQs) are widely used. Recall ability is a known systematic error in PAQs. The aim of the investigation was to assess the impact of age and type of activity (moderate or vigorous) on ...
Purpose: To compare the Freedson, Crouter and Santos-Lozano (vertical axis [VT] and vector-magnitude [VM]) equations for ActiGraph GT3X+ (AG) with indirect calorimetry for predicting energy expenditure (EE) in older adults in free-living environments. Methods: Forty older adults (age=77.36 yr (SD+8.13; range 66 to 99 years), BMI=25.96 kg∙m-2 (SD=3.67) completed a ...