Research Database

221 results for "Adolescents"

Locations of physical activity as assessed by GPS in young adolescents

  • Published on Jan. 2016

Objectives: To compare adolescents’ physical activity at home, near home, at school, near school, and at other locations. Methods: Adolescents (N = 549) were ages 12 to 16 years (49.9% girls, 31.3% nonwhite or Hispanic) from 447 census block groups in 2 US regions. Accelerometers and Global Positioning System devices assessed minutes of and proportion of time spent ...


Effect and cost of an after-school dance programme on the physical activity of 11–12 year old girls: The Bristol Girls Dance Project, a school-based cluster randomised controlled trial

  • Published on Oct. 6, 2015

Background: The aim of this study was to examine the effectiveness and cost of an after-school dance intervention at increasing the physical activity levels of Year 7 girls (age 11–12). Methods: A cluster randomised controlled trial was conducted in 18 secondary schools. Participants were Year 7 girls attending a study school. The Bristol Girls ...


Misreporting of energy intake in a new web-based food record for children and adolescents

  • Presented on 2015

Background: Misreporting of energy intake is well known from traditional dietary assessment methods, and assessment among the youngest is especially challenging. Web-based tools are increasingly popular. However, little is known whether these web-tools improve the recording accuracy. Objective: To assess the accuracy of children and adolescent's energy intake estimated from ...


Association between neighborhood walkability and GPS-measured walking, bicycling and vehicle time in adolescents

  • Published on Jan. 9, 2015

Objectives: To investigate relations of walking, bicycling and vehicle time to neighborhood walkability and total physical activity in youth. Methods: Participants (N=690) were from 380 census block groups of high/low walkability and income in two US regions. Home neighborhood residential density, intersection density, retail density, entertainment density and walkability were ...


Longitudinal changes in sedentary time and physical activity during adolescence

  • Published on April 1, 2015

Background: Low levels of physical activity and high time spent in sedentary activities have been associated with unfavourable health outcomes in adolescents. During adolescence, physical activity declines and sedentary time increases, however little is known about whether the magnitude of these changes differs within or between school-time, after-school time, or ...


Separating Bedtime Rest from Activity Using Waist or Wrist-Worn Accelerometers in Youth

  • Published on April 11, 2014

Abstract: Recent interest in sedentary behavior and technological advances expanded use of watch-size accelerometers for continuous monitoring of physical activity (PA) over extended periods (e.g., 24 h/day for 1 week) in studies conducted in natural living environment. This approach necessitates the development of new methods separating bedtime rest and activity ...


Association of Concurrent Healthy Eating and Regular Physical Activity With Cardiovascular Disease Risk Factors in U.S. Youth

  • Published on Nov. 5, 2014

Purpose: Examine whether concurrently consuming a healthy diet and regularly being physically active among U.S. youth is more favorably associated with cardiovascular disease (CVD) biomarkers than other physical activity and dietary patterns. Design: Cross-sectional. Setting: United States (National Health and Nutrition Examination Survey) 2003–2006. Subjects: Two thousand six hundred twenty-nine ...


Exploring associations between parental and peer variables, personal variables and physical activity among adolescents: a mediation analysis

  • Published on Sept. 18, 2014

Background: This study aimed to investigate how parental and peer variables are associated with moderate- to-vigorous intensity physical activity (MVPA) on week- and weekend days among Australian adolescents (13-15y), and whether perceived internal barriers (e.g. lack of time), external barriers (e.g. lack of others to be physically ...


Combining GPS, GIS, and accelerometry to explore the physical activity and environment relationship in children and young people – a review

  • Published on Sept. 13, 2014

Abstract: The environment has long been associated with physical activity engagement, and recent developments in technology have resulted in the ability to objectively quantify activity behaviours and activity context. This paper reviews studies that have combined Global Positioning Systems (GPS), Geographic Information Systems (GIS) and accelerometry to investigate the PA-environment ...


Prevalence and Correlates of Screen time in Youth

  • Published on Sept. 15, 2014

Background: Screen time (including TV viewing/computer use) may be adversely associated with metabolic and mental health in children. Purpose: To describe the prevalence and sociodemographic correlates of screen time in an international sample of children aged 4–17 years. Methods: Data from the International Children’s Accelerometry Database were collected between 1997–2009 ...