Research Database

201 results for "Validation"

Selecting an Appropriate Motion Sensor in Children and Adolescents

  • Added on November 18, 2010

The purpose of the present study was to systematically review published evidence on the reproducibility, validity, and feasibility of motion sensors used to assess physical activity in healthy children and adolescents (2-18 yr). Method A systematic literature search was performed in October 2004 in PubMed, Embase, and SpycINFO. The clinimetric quality ...

Physical Activity During Pregnancy Measured with the MTI Actigraph

  • Published on 05/2003

Purpose To assess PA levels across trimesters of pregnancy using the actigraph. Methods 37 women (mean age = 29.9±7.5y) (trimester 1 (T1) n = 11. trimester 2 (T2) n = 14, trimester 3 (T3) n = 12) wore the MTI Actigraph for seven consecutive days. Time spent in moderate and vigorous activity (counts 1952) was classified by Freedson cut points. PA levels ...

Physical Activity Patterns in Normal, Overweight and Obese Individuals Using Minute-by-Minute Accelerometry

  • Published on 12/2000

Objective To determine the levels and patterns of daily physical activity in groups of normal-weight, overweight and obese adults using uniaxial minute-by-minute accelerometry. Design Cross-sectional study of physical activity levels over a 7 day period using accelerometers programmed to collect minute-by-minute data. Setting Participants were recruited from large companies in Bristol ...

Physical Activity Levels and Patterns of 9- and 15-year-old European Children

  • Added on November 8, 2010

Purpose The purpose of this study was to assess physical activity levels and patterns from children participating in the European Youth Heart Study (EYHS) Very limited physical activity data exist that have been collected from representative samples of children and even fewer data collected where physical activity has been measured ...

Technical Reliability Assessment of the Actigraph GT1M Accelerometer

  • Published on 04/2010

The purpose of this study was to determine the reliability of the Actigraph GT1M (Pensacola, FL, USA) accelerometer activity count and step functions. Fifty GT1M accelerometers were initialized to collect simultaneous acceleration counts and steps data using 15-sec epochs. All reliability testing was completed using a mechanical shaker ...

Nocturnal Activity and Sleep Assessment

  • Added on November 4, 2010

Sleep occupies approximately one third of our lives yet its modem study has largely been restricted to the use of the polygraph and to self-report via sleep logs. Actigraphy is a method for obtaining objective behavioral samples of nocturnal as well as diurnal activity. Activity is continuously measured and recorded ...