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  • Author: Vassilios Gourgoulis x
  • Psychology and Behavior in Sport/Exercise x
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Anastasia Bounova, Maria Michalopoulou, Nikolaos Agelousis, Thomas Kourtessis and Vassilios Gourgoulis


Nowadays, the majority of adolescents exceed the AAP guidelines for screen use and this is likely to be a risk factor for obesity. The current study aims at investigating adolescent screen viewing in the context of home and neighborhood environment.


A sample of 1141 adolescents as well as their parents participated in this survey. Adolescents were asked to complete a questionnaire about time spent on screen viewing behaviors. Respectively, parents completed a questionnaire concerning environmental predictors.


Almost two-thirds of the adolescents surveyed spend more than 2 hours per day on screen entertainment, with boys dealing with personal computers (PCs) and electronic games more than girls. The likelihood for an adolescent to exceed 2 hours of screen time is 3.87 times more when he has his meals in front of a TV screen on a daily basis, 1.69 times more when the TV is on, often as not on his return from school and 1.74 times more when there is a PC in the adolescent’s bedroom.


Certain environmental predictors influence adolescents’ screen time, as a result, corrective intervention should aim at the family as a whole, as this whole shapes home environment.

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Dimitrios Aivazidis, Fotini Venetsanou, Nikolaos Aggeloussis, Vassilios Gourgoulis and Antonis Kambas

Background: This study aimed at evaluating the effect of the “Walk,” an 8-month physical activity (PA) program led by classroom and physical education teachers, on the motor competence (MC) and PA of 5- to 6-year-old children. Methods: A total of 143 children (mean age = 61.51 [1.85] mo) participated in the study and were randomly assigned to the experimental and control groups. Children’s MC was assessed by the Körperkoordination Test für Kinder (KTK), and PA was objectively measured by Omron HJ-720IT-E2 pedometers. Measurements were performed at baseline, midintervention, and postintervention. A 1-sample t test computed at baseline step counts revealed that children presented significantly lower PA than recommended for their age (P < .001). To examine the effect of the intervention on children’s MC and PA, several repeated-measures analyses of variance were utilized on (1) KTK item scores and (2) pedometer data. Results: The results revealed that the Walk project led to practically significant changes in the experimental group compared with the control group in both MC (P < .001, η2 > .14 for all KTK items) and PA (P < .001, η2 = .23). Conclusions: This study highlights the efficacy of a PA project, involving both classroom and physical education teachers, for the enhancement of children’s MC and PA.