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Stefan Wagnsson, Magnus Lindwall, and Henrik Gustafsson

The purpose of the study was to test longitudinal (2 years across three occasions) associations between sport participation (SP) and self-esteem (SE) across adolescence (10–18 years), addressing the mediating role of perceived sport competence (PSC) from a developmental perspective. Three waves of data were collected from three age cohorts (10–12, 13–15, and 16–18 years) of school-aged youth (N = 1358). The results demonstrate that SP and SE are related across time and that PSC has an important mediating role in this relationship, both from a skill development and a self-enhancement perspective. In the skill development model, the mediating role of PSC was significantly stronger in the youngest cohort whereas the effect of PSC on subsequent SP in the self-enhancement model was significantly stronger in the 13–15 age group compared with the youngest age group.

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Iiris Kolunsarka, Arto Gråstén, Mikko Huhtiniemi, and Timo Jaakkola

childhood to early adolescence ( Barnett et al., 2022 ; Robinson et al., 2015 ; Stodden et al., 2008 ). The conceptual model of Stodden et al. ( 2008 ), titled “A Developmental Perspective on the Role of Motor Skill Competence in Physical Activity,” has been widely used to explain the physical activity

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Amanda Timler, Fleur McIntyre, and Beth Hands

adolescence is level of motor competence. Harter ( 2012 ) describes motor competence as an adolescent’s perceived athletic ability and preference to participate in sports and physical activity, such as outdoor games. An adolescent’s perceived judgement of their motor competence may influence their ability to

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Alberto Pardo-Ibáñez, Jose L. Bermejo, Sergio Gandia, Julien Maitre, Israel Villarrasa-Sapiña, Isaac Estevan, and Xavier Garcia-Masso

). Children largely depend on the visual system to maintain body stability ( Lee & Aronson, 1974 ; Lishman & Lee, 1973 ). This preponderance is reduced progressively as the proprioceptive system is developed during childhood and adolescence ( Barela, Barela, Rinaldi, & de Toledo, 2009 ; Godoi & Barela, 2008

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Ben Serrien, Maggy Goossens, and Jean-Pierre Baeyens

biomechanics and motor control research. In team sports such as volleyball, it is suggested that TDPs are typically organized during late puberty and adolescence (14–18 years) after the first signs of talent become visible. This period is notable for its considerable hormonal changes and increases in body size

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Pedro C. Hallal, Samuel Carvalho Dumith, Felipe Fossati Reichert, Ana M.B. Menezes, Cora L. Araújo, Jonathan C.K. Wells, Ulf Ekelund, and Cesar G. Victora


To explore cross-sectional and longitudinal associations between self-reported and accelerometry-based physical activity (PA) and blood pressure (BP) between 11 and 14 years of age.


Prospective birth cohort study in Pelotas, Brazil. Participants were 427 cohort members who were followed up with at 11, 12, and 14 years of age, and had questionnaire data on PA and BP at 11 and 14 years, as well as accelerometry and questionnaire data on PA at 12 years. Outcome measures were continuous systolic and diastolic BP at 14 years, and change in BP from 11 to 14 years.


PA was unrelated to systolic BP in any analyses. PA measured by accelerometry at 12 years, but not questionnaire-derived PA, was inversely associated with diastolic BP at 14 years of age in fully adjusted models. Those who exceeded the 300-minutes PA threshold at all 3 visits had a 2.6 mmHg lower mean increase in DBP from 11 to 14 years compared with those classified below the threshold in all visits.


Accelerometry-based PA was longitudinally inversely associated with diastolic BP. This finding was not evident when analyzing self-reported PA at a given age, suggesting a possible underestimation of the association when using subjective data.

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Stein G.P. Menting, Marco J. Konings, Marije T. Elferink-Gemser, and Florentina J. Hettinga

18 and cognitive changes 19 , 20 that athletes experience during adolescence, can be expected to have an effect on the development of pacing behavior of youth athletes. 13 To achieve a better understanding of the goal-directed decision-making process involved in pacing, the development process of

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Sari Aaltonen, Teemu Palviainen, Richard J. Rose, Urho M. Kujala, Jaakko Kaprio, and Karri Silventoinen

aimed to examine to what extent LTPA and academic performance in spelling, essay writing, reading aloud, reading comprehension, and mathematics share genetic and environmental influences in early adolescence using genetic twin modeling and polygenic scores (PGS). By using these 2 different methods, each

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Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K. Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z. Jamurtas, Craig A. Williams, and Ioannis G. Fatouros

, and a similar biomechanical movement pattern (eg, plyometric jumps). 17 The available information regarding the responses of soccer players to periodized complex strength/power training during early adolescence is limited. Therefore, this study used a comprehensive set of measurements to evaluate the

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Kalli A. Reynolds, Emma Haycraft, and Carolyn R. Plateau

–17 years do not meet the World Health Organization’s 4 recommendation of at least 60 minutes of moderate to vigorous physical activity per day. 5 Since adult physical activity behaviors and attitudes are often established in adolescence, 6 understanding the influences on physical activity in adolescents