Browsing Publikasjoner fra Cristin by Subject "adolescents"
Now showing items 1-20 of 20
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Aerobic fitness mediates the intervention effects of a school-based physical activity intervention on academic performance: The School in Motion study: A cluster randomized controlled trial
(Peer reviewed; Journal article, 2021)Little information exists on the mechanism of how physical activity interventions effects academic performance. We examined whether the effects of a school-based physical activity intervention on academic performance were ... -
Anabolic–androgenic steroid use and correlates in Norwegian adolescents
(Journal article; Peer reviewed, 2018)This paper surveys the prevalence and correlates of anabolic androgenic steroids (AAS) use among Norwegian adolescents, and examines the degree to which sports participation is a mediating or moderating factor to well-known ... -
Associations between changes in physical fitness and psychological difficulties status among Norwegian adolescents
(Peer reviewed; Journal article, 2021)Objectives To investigate the associations for one-year changes in cardiorespiratory fitness, muscular strength and body mass index, with psychological difficulties status in adolescents. Methods Norwegian ... -
A closer look at the relationship among accelerometer-based physical activity metrics: ICAD pooled data
(Peer reviewed; Journal article, 2019)Background: Accelerometers are widely used to assess child physical activity (PA) levels. Using the accelerometer data, several PA metrics can be estimated. Knowledge about the relationships between these different metrics ... -
Development of positive emotions in physical education: Person-centered approach for understanding motivational stability and change
(Peer reviewed; Journal article, 2019)A person-centered exploration of positive emotions in relation to selfdetermination theory might shed light on the hidden dynamics in the motivational processes in physical education (PE). In the present longitudinal study, ... -
Device-measured sedentary time in Norwegian children and adolescents in the era of ubiquitous internet access: Secular changes between 2005, 2011 and 2018
(Peer reviewed; Journal article, 2022)Background: Access to screen-based media has been revolutionized during the past two decades. How this has affected sedentary time (ST) accumulation in children is poorly understood. Methods: This study, based on the ... -
The effect of a school-based intervention on physical activity, cardiorespiratory fitness and muscle strength: The School in Motion cluster randomized trial
(Peer reviewed; Journal article, 2020)Background: Physical activity (PA) declines throughout adolescence, therefore PA promotion during this period is important. We analyzed the effect of two school-based PA interventions on daily PA levels, cardiorespiratory ... -
Effects of a school-based physical activity intervention on academic performance in 14-year old adolescents: A cluster randomized controlled trial – the School in Motion study
(Peer reviewed; Journal article, 2021)Background: School-based physical activity interventions evaluating the effect on academic performance usually includes children. We aimed to investigate the effect of a nine-month, school-based physical activity intervention ... -
Genetic variation in candidate genes and patellar tendinopathy: Prospective cohort study of 126 elite volleyball players
(Journal article; Peer reviewed, 2018)Variation in genes coding for structural proteins may represent risk factors for developing tendinopathy among athletes. The purpose of this prospective cohort study of elite volleyball students was to investigate whether ... -
The healthy body image (HBI) intervention: Effects of a school-based cluster-randomized controlled trial with 12-months follow-up
(Peer reviewed; Journal article, 2019)We examined the effects of the Healthy Body Image (HBI) intervention on positive embodiment and health-related quality of life among Norwegian high school students. The intervention comprised three interactive workshops, ... -
Height and body-mass index trajectories of school-aged children and adolescents from 1985 to 2019 in 200 countries and territories: A pooled analysis of 2181 population-based studies with 65 million participants
(Peer reviewed; Journal article, 2020)Background: Comparable global data on health and nutrition of school-aged children and adolescents are scarce. We aimed to estimate age trajectories and time trends in mean height and mean body-mass index (BMI), which ... -
Influence of adiposity and physical activity on the cardiometabolic association pattern of lipoprotein subclasses to aerobic fitness in prepubertal children
(Peer reviewed; Journal article, 2021)Aerobic fitness (AF) and lipoprotein subclasses associate to each other and to cardiovascular health. Adiposity and physical activity (PA) influence the association pattern of AF to lipoproteins almost inversely making it ... -
Longitudinal Training-related Hematological Changes in Boys and Girls from Ages 12 to 15 yr
(Peer reviewed; Journal article, 2020)Purpose Natural growth and maturation cause hemoglobin mass (Hbmass) and blood volume (BV) to increase during childhood and adolescence. Whether endurance training during the same period can cause further increases in these ... -
Perceived versus real swimming skills of adolescents under standard and challenging conditions: Exploring water competencies as an approach to drowning prevention
(Peer reviewed; Journal article, 2020)In this study, we compared adolescents’ actual (expert assessed) front crawl swimming skills to their self-assessment in two conditions: in standard swimming (wearing a swimsuit and goggles) and in a simulated risk scenario ... -
Physical activity, mental health and academic achievement: A cross-sectional study of Norwegian adolescents
(Peer reviewed; Journal article, 2020)Background: The purpose of this study was to describe associations between physical activity (PA), mental health and academic achievement in a Norwegian adolescent cohort. Methods: In total, 1001 adolescents were invited ... -
The physical behaviour intensity spectrum and body mass index in school-aged youth: A compositional analysis of pooled individual participant data
(Peer reviewed; Journal article, 2022)We examined the compositional associations between the intensity spectrum derived from incremental acceleration intensity bands and the body mass index (BMI) z-score in youth, and investigated the estimated differences in ... -
Psychosocial predictors of drop-out from organised sport: A prospective study in adolescent soccer
(Peer reviewed; Journal article, 2022)In recent years an increased drop-out rate in adolescents’ soccer participation has been observed. Given the potentially adverse consequences of drop-out from soccer, more information about risk factors for drop-out is ... -
Self-reported health in adolescents with exercise-induced laryngeal obstruction; A cross-sectional study
(Peer reviewed; Journal article, 2021)Background: Exercise-induced laryngeal obstruction (EILO) is common in young people with exertional breathing difficulties. Psychological characteristics have been proposed as underlying contributors; however, the evidence ... -
Sexual harassment and abuse among young elite athletes, recreational athletes, and reference students: A prospective study
(Peer reviewed; Journal article, 2022)Purpose: To examine the 12-months prevalence and 12-months prospective change in reported sexual harassment and abuse (SHA)-victimization among young elite athletes, recreational athletes, and reference students in three ... -
Temporal trends in physical activity levels across more than a decade – a national physical activity surveillance system among Norwegian children and adolescents
(Peer reviewed; Journal article, 2021)Background: There is a scarcity of device measured data on temporal changes in physical activity (PA) in large population-based samples. The purpose of this study is to describe gender and age-group specific temporal trends ...