TY - JOUR
T1 - Tracking of physical activity during adolescence
T2 - The 1993 Pelotas Birth Cohort, Brazil
AU - Azevedo, Mario Renato
AU - Menezes, Ana Maria
AU - Assunção, Maria Cecília
AU - Gonçalves, Helen
AU - Arumi, Ignasi
AU - Horta, Bernardo Lessa
AU - Halla, Pedro Curi
PY - 2014
Y1 - 2014
N2 - Objective: To analyze physical activity during adolescence in participants of the 1993 Pelotas Birth Cohort Study, Brazil. Methods: Data on leisure time physical activity at 11, 15, and 18 years of age were analyzed. At each visit, a cut-off point of 300 min/week was used to classify adolescents as active or inactive. A total of 3,736 participants provided data on physical activity at each of the three age points. Results: A significant decline in the proportion of active adolescents was observed from 11 to 18 years of age, particularly among girls (from 32.9% to 21.7%). The proportions of girls and boys who were active at all three age points were 28.0% and 55.1%, respectively. After adjustment for sex, economic status, and skin color, participants who were active at 11 and 15 years of age were 58.0% more likely to be active at 18 years of age compared with those who were inactive at 11 and 15 years of age. Conclusions: Physical activity declined during adolescence and inactivity tended to track over time. Our findings reinforce the need to promote physical activity at early stages of life, because active behavior established early tends to be maintained over time.
AB - Objective: To analyze physical activity during adolescence in participants of the 1993 Pelotas Birth Cohort Study, Brazil. Methods: Data on leisure time physical activity at 11, 15, and 18 years of age were analyzed. At each visit, a cut-off point of 300 min/week was used to classify adolescents as active or inactive. A total of 3,736 participants provided data on physical activity at each of the three age points. Results: A significant decline in the proportion of active adolescents was observed from 11 to 18 years of age, particularly among girls (from 32.9% to 21.7%). The proportions of girls and boys who were active at all three age points were 28.0% and 55.1%, respectively. After adjustment for sex, economic status, and skin color, participants who were active at 11 and 15 years of age were 58.0% more likely to be active at 18 years of age compared with those who were inactive at 11 and 15 years of age. Conclusions: Physical activity declined during adolescence and inactivity tended to track over time. Our findings reinforce the need to promote physical activity at early stages of life, because active behavior established early tends to be maintained over time.
KW - Adolescent
KW - Cohort studies
KW - Exercise
KW - Motor activity
KW - Sedentary lifestyle
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UR - http://www.scopus.com/inward/citedby.url?scp=84921448990&partnerID=8YFLogxK
U2 - 10.1590/S0034-8910.2014048005313
DO - 10.1590/S0034-8910.2014048005313
M3 - Article
C2 - 26039395
AN - SCOPUS:84921448990
SN - 0034-8910
VL - 48
SP - 925
EP - 930
JO - Revista de saude publica
JF - Revista de saude publica
IS - 6
ER -