Search again

208 Results for: "Adolescents"

Comparison of a physical activity recall questionnaire with accelerometry in children and adolescents with obesity: a pilot study

  • Published on Sep 21, 2016

This study aimed to determine the validity of the Habitual Activity Estimation Scale (HAES) for assessing physical activity (PA) in children and adolescents with severe obesity. Data were obtained from participants (n = 17) in the High Impact Strategies Toward Overweight Reduction in Youth study at the Hospital for Sick Children ...


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 (...


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 ...


School grounds and physical activity: Associations at secondary schools, and over the transition from primary to secondary schools

  • Published on May 2016

This paper aims to further understanding of the physical environments of secondary schools and their associations with young peoples' physical activity. Accelerometer-derived physical activity measurements from 299 participants in the SPEEDY study (Norfolk, UK) were obtained from baseline measurements (age 9–10 y) and +4y follow-up. These were linked to objective measures ...


Cardiorespiratory fitness in urban adolescent girls: associations with race and pubertal status

  • Published on Mar 4, 2016

Cardiorespiratory fitness affords health benefits to youth. Among females, weight-relative fitness declines during puberty and is lower among African American (AA) than Caucasian girls. Data indicate racial differences in pubertal timing and tempo, yet the interactive influence of puberty and race on fitness, and the role of physical activity (PA) ...


Changes in Individual and Social Environmental Characteristics in Relation to Changes in Physical Activity: a Longitudinal Study from Primary to Secondary School

  • Published on Oct 2016

Purpose: Physical activity (PA) strongly decreases when children make the transition from primary to secondary school. The study aimed to investigate how individual and social environmental factors toward PA changed when children (11–12 years) made the transition from primary to secondary school (13–14 years) and how changes in these factors ...


Changing from primary to secondary school highlights opportunities for school environment interventions aiming to increase physical activity and reduce sedentary behaviour: a longitudinal cohort study

  • Published on 2015

Background: There is little empirical evidence of the impact of transition from primary to secondary school on obesity-related risk behaviour. The purpose of this study was to examine the effect of a change of school system on physical activity (PA) and sedentary behaviour in pre-early adolescents. Methods: Fifteen schools in ...


Objectively Measured Physical Activity During Physical Education and School Recess and Their Associations With Academic Performance in Youth: The UP&DOWN Study

  • Published on Apr 4, 2017

Background: This study examined the associations of objectively measured physical activity in Physical Education and recess with academic performance in youth. Methods: This cross-sectional study was conducted with 1,780 participants aged 6 to 18 years (863 girls). Physical activity was objectively measured by accelerometry and was also classified according to sex- and age specific ...


Validation of thigh-based accelerometer estimates of postural allocation in 5–12 year-olds

  • Published on Aug 12, 2016

Objectives: To validate activPAL3™ (AP3) for classifying postural allocation, estimating time spent in postures and examining the number of breaks in sedentary behaviour (SB) in 5–12 year-olds. Design: Laboratory-based validation study. Methods: Fifty-seven children completed 15 sedentary, light- and moderate-to-vigorous intensity activities. Direct observation (DO) was used as the criterion ...