Research Database

215 results for "Adolescents"

Effects of a peer-led Walking In ScHools intervention (the WISH study) on physical activity levels of adolescent girls: a cluster randomised pilot study

  • Published on Jan 11, 2018

Background: School-based interventions may be effective at increasing levels of physical activity (PA) among adolescents; however, there is a paucity of evidence on whether walking can be successfully promoted to increase PA in this age group. This pilot study aimed to assess the effects of a 12-week school-based peer-led brisk ...


Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth

  • Published on Dec 23, 2017

Purpose: The present study examined various accelerometer nonwear definitions and their impact on detection of sedentary time using different ActiGraph models, filters, and axes. Methods: In total, 61 youth (34 children and 27 adolescents; aged 5-17 y) wore a 7164 and GT3X+ ActiGraph on a hip-worn belt during a 90-minute structured sedentary activity. ...


Association between Physical Activity and Adiposity in Adolescents with Down Syndrome

  • Published on Apr 2018

Purpose: Obesity is highly prevalent among adolescents with Down syndrome (DS); however, reported associations between body composition and moderate-to-vigorous physical activity (MVPA) have been small and nonsignificant. The purpose of this study was to compare group differences between adolescents with and without DS, including dual-energy x-ray absorptiometry (DXA) measured body ...


Accelerometric estimates of physical activity vary unstably with data handling.

  • Published on Nov 6, 2017

Background: Because of unreliable self-report, accelerometry is increasingly used to objectively monitor physical activity (PA). However, results of accelerometric studies vary depending on the chosen cutpoints between activity intensities. Population-specific activity patterns likely affect the size of these differences. To establish their size and stability we apply three sets of ...


Increases in Use and Activity Due to Urban Renewal: Effect of a Natural Experiment.

  • Published on Sep 2017

Introduction: Urban green space and other recreational facilities are associated with physical activity. For adolescents living in multistory housing, public outdoor spaces that support physical activity may play an important role in activity promotion strategies. However, stronger evidence for a relation between the built environment and adolescent physical activity is ...




EASY – An Instrument for Surveillance of Physical Activity in Youth

  • Published on Jun 21, 2017

There is a need for a self-report instrument, with sound psychometric properties, for monitoring compliance with physical activity guidelines in youth. This study aimed to develop such an instrument by applying Item Response Theory as well as traditional methods for assessing validity and reliability. Focus groups, conducted with 162 middle school ...


Relationship between school rhythm and physical activity in adolescents: the HELENA study

  • Published on 2017

The aim was to assess the relationship between school rhythm and physical activity (PA) in adolescents. The study included 2024 adolescents (12.5–17.4 years). Participants wore an accelerometer for 7 days. A short school rhythm was defined as a short time at school with short recesses and less time in teaching per day (Group 1). ...


Disparities in moderate-to-vigorous physical activity among girls and overweight and obese schoolchildren during school- and out-of-school time

  • Published on Mar 22, 2016

Background: Increasing physical activity (PA) during the school day and out-of-school time are critical strategies for preventing childhood obesity and improving overall health. The purpose of the present investigation was to examine schoolchildren’s volume and type of PA during school-time and out-of-school, compared to national recommendations and differences by ...