ArticlePloS one2020
Decline of physical activity in early adolescence: A 3-year cohort study.
Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05912439 (Smartphone Based Health Behaviour Intervention for Adolescents; Usage and Daily Attrition Rates.), which is not on this map. Cited by 35 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Smartphone Based Health Behaviour Intervention for Adolescents; Usage and Daily Attrition Rates.
Who cites it
35 citing papers in PubMed, 2 syntheses or guidelines pooled it, 76 citations in OpenAlex.
- Global research on 24-hour movement behaviours guidelines in children and adolescents: a systematic review.The international journal of behavioral nutrition and physical activity · 2025Pooled it
- From active play to sedentary lifestyles: understanding the decline in physical activity from childhood through adolescence-a systematic review.Frontiers in public health · 2025Pooled it
- One-Year Effects of the FIT FIRST 20 High-Intensity and Multisport Physical Education Program on Physical Fitness and Psychological Outcomes in Early Adolescents: A Cluster-Randomized Controlled Trial.Scandinavian journal of medicine & science in sports · 2026Trial
- Usage and Daily Attrition of a Smartphone-Based Health Behavior Intervention: Randomized Controlled Trial.JMIR mHealth and uHealth · 2023Trial
- Physical activity-based, wholistic, wellness interventions for Indigenous women in Canada: An environmental scan to identify programs and promising practices.Canadian journal of public health = Revue canadienne de sante publique · 2026Review
- Variability in moderate-to-vigorous physical activity assessment: Comparing tri-axial accelerometry cut-off points in children.Sports medicine and health science · 2026Article
- Reframing nature connectedness as a psychosocial mechanism for youth mental health.Frontiers in psychiatry · 2026Review
- Article
- From furry friends to fit teens: unveiling the role of active dog breeds in shaping adolescent physical activity and screen time behaviors.BMC public health · 2025Article
- Changes in accelerometer-measured physical activity and self-reported leisure time physical activity from adolescence to young adulthood: a longitudinal cohort study from the Fit Futures Study.The international journal of behavioral nutrition and physical activity · 2025Article
- Effects of weight status, sex, age, sedentary behavior, pubertal status and socioeconomic status on the physical activity of children and adolescents.BMC public health · 2025Article
- Article
- Longitudinal Associations of Body Fatness and Physical Fitness with Cognitive Skills in Preschoolers.Children (Basel, Switzerland) · 2024Article
- Influence of Body Mass Index, Physical Fitness, and Physical Activity on Energy Expenditure during Recess.Children (Basel, Switzerland) · 2024Article
- Physical activity moderates the association between school start time and sleep duration in a cross-sectional national sample of adolescents.Journal of activity, sedentary and sleep behaviors · 2024Article
- Article
- Blended learning in physical education: application and motivation.Frontiers in psychology · 2024Article
- The Relationship of the PROMISChildren (Basel, Switzerland) · 2023Article
- Quantification of the Number of Steps in a School Recess by Means of Smart Bands: Proposal of Referential Values for Children and Adolescents.Children (Basel, Switzerland) · 2023Article
- Increasing Physical Activity at School Improves Physical Fitness of Early Adolescents.International journal of environmental research and public health · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This study analyses the changes of moderate-to-vigorous physical activity (MVPA) in a cohort of boys and girls aged 11 (n = 50) and 14 (n = 50). Physical activity was assessed with Bodymedia SenseWear Pro Armband monitor for 6 days in October 2013 and October 2016, considering 90% of daily wear time (21h and 40min). The initial sample (n = 160) included the children who wore the monitors at age 11 but the final analyzed sample included only those children from the initial sample (n = 50), whose data fulfilled the inclusion criteria at age 11 and 14. Physical fitness and somatic characteristics of the final sample (n = 50) were compared to a representative sample of Slovenian schoolchildren at ages 11 (n = 385) and 14 (n = 236) to detect possible bias. Changes in MVPA were controlled for maturity using the timing of adolescent growth spurt as its indicator. The average MVPA decreased more than one quarter (34.96 min) from age 11 to age 14. Children were significantly more active at age 11 than at age 14 (p < 0.01, d = 0.39). The timing of puberty onset in girls was significantly earlier (12.01 ± 1.0 years) (p < 0.01) than in boys (13.2 ± 0.75 years) (p < 0.01, d = 1.35). There was a significant gender difference in moderate-to vigorous physical activity at age 14 (p < 0.05, η2 = 0.12) and between moderate-to vigorous physical activity at age 11 and 14 (η2 = 0.11). After controlling for the timing of adolescent growth spurt the girls at age 11 showed significantly higher level of physical activity than at age 14 (p < 0.01, η2 = 0.17). Early adolescence is crucial for the development of physical activity behaviours, which is especially pronounced in girls. The significant decline of MVPA between ages 11 and 14 in Slovenia are likely influenced by environmental changes since the timing of adolescent growth spurt did not prove as a factor underlying the decline of MVPA.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.