Adolescents' physical activity trends over the years: a three-cohort study based on the Health Behaviour in School-aged Children (HBSC) Portuguese survey

作者：Marques Adilson^*; de Matos Margarida Gaspar

来源：BMJ Open, 2014, 4(10): e006012.

DOI：10.1136/bmjopen-2014-006012

Objective: Many young people do not practise enough physical activity (PA) to benefit their health. The three-cohort study aimed to investigate the prevalence of PA and understand the trends between 2002 and 2010, using a representative sample of Portuguese adolescents.
Design, setting and participants: The participants were 8483 adolescents (4067 boys, 4416 girls) who participated in the Health Behaviour in School-aged Children Portuguese survey in 2002, 2006 and 2010.
Design, setting and participants: A questionnaire was used to collect data of PA. Analyses were run separately for boys and girls.
Results: Boys aged 15-17 reported practising 3.5 +/- 1.9 times a week in 2002, 3.9 +/- 1.9 times a week in 2006 and 3.8 +/- 1.9 times a week in 2010, with a significant increase from 2002 to 2006/2010 (p<0.05). PA practice during the past 7 days decreased from 4.2 +/- 2.1 to 3.9+1.9 between 2002 and 2006 (p<0.001) and also decreased from 4.4 +/- 2.1 to 3.8 +/- 1.9 between 2006 and 2010 (p<0.001). Among girls, PA practices during the past 7 days declined significantly from 3.5 +/- 1.9 to 2.7 +/- 1.7 between 2002 and 2006 (p<0.001), and from 3.3 +/- 1.9 to 2.9 +/- 1.7 between 2006 and 2010 (p<0.001).
Conclusions: The study points to age as a factor related to diminished PA participation. The study also revealed that the prevalence of PA has decreased over the years for the same age groups.

• 出版日期2014