Temporal relationships between screen-time and physical activity with cardiorespiratory fitness in English schoolchildren: a 2-year longitudinal study.
Prev Med
; 55(1): 37-9, 2012 Jul.
Article
em En
| MEDLINE
| ID: mdl-22561029
ABSTRACT
OBJECTIVE:
To determine the temporal relationships screen-time and physical activity have with cardiorespiratory fitness.METHOD:
Measures were made over two years (2008-2010) in 1500 participants aged 11.5 (SD 0.5) years at baseline.RESULTS:
Tracking coefficients were low-to-moderate for all measures. At follow-up, 25% of participants moved from having low (<2h) to high (≥ 2 h) daily screen-time and 6% became unfit according to FITNESSGRAM standards. Baseline screen-time was the strongest univariate predictor of becoming unfit. Multivariate analysis controlling for decimal age, BMI and deprivation confirmed baseline screen-time as the strongest independent predictor of becoming unfit over the 2-year study period (OR 2.4; 95%CI1.4-4.0). Current (OR 2.3; 95%CI1.3-4.0) and previous (OR 1.7; 95%CI1.0-2.9) physical activity levels also independently predicted becoming unfit.CONCLUSION:
There is currently no guidance for limiting screen-time in UK children. These longitudinal data add to the cross-sectional evidence of lower physical activity and fitness in children reporting ≥ 2 h daily screen-time. More importantly, these data demonstrate that high screen-time during childhood is an independent predictor of lower cardiorespiratory fitness in adolescence.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Estudantes
/
Televisão
/
Débito Cardíaco
/
Exercício Físico
/
Comportamento Sedentário
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Qualitative_research
/
Risk_factors_studies
Limite:
Adolescent
/
Child
/
Female
/
Humans
/
Male
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article