Research Database

198 results for "Validation"

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 ...


Validation of the ActiGraph Two-Regression Model for Predicting Energy Expenditure

  • Published on 09/2010

Purpose To validate a two-regression model for predicting energy expenditure (EE) from ActiGraph GT1M accelerometer generated activity counts using a whole-room indirect calorimeter and the doubly-labeled water (DLW) technique. We also investigated if a low-pass filter (LPF) approach would improve the model’s accuracy in the minute-to-minute EE prediction. ...


Evaluation of the MyWellness Key Accelerometer

  • Published on 06/11/2010

Objective To examine the concurrent validity of the Technogym MyWellness Key accelerometer against objective and subjective physical activity (PA) measures. Design Randomised, cross-sectional design with two phases. The laboratory phase compared the MyWellness Key with the ActiGraph GT1M and the Yamax SW200 Digiwalker pedometer during graded treadmill walking, increasing ...


Surveillance of Physical Activity in the UK is Flawed: Validation of the Health Survey for England Physical Activity Questionnaire

  • Published on 09/09/2010

Objective Public health surveillance of physical activity in children in the UK depends on a parent-reported physical activity questionnaire which has not been validated. We aimed to validate this questionnaire against measurement of physical activity using accelerometry in 6–7-year-old children. Methods In 130 children aged 6–7 years (64 boys, 66 girls) we estimated habitual ...


Actigraphy as a measure of physical activity for wheelchair users with spinal cord injury

  • Added on March 1, 2004

Background: Research has indicated that actigraphy is valid and reliable for measuring low levels of physical activity among ambulatory individuals, and that it may be a valid indicator of energy expenditure for wheelchair users in laboratory conditions, but there are no reports of its evaluation in free-living conditions. Objective: To ...