Azevedo, Mario Renato, Ana Maria Menezes, Maria Cecília Assunção, Helen Gonçalves, Ignasi Arumi, Bernardo Lessa Horta, and Pedro Curi Hallal. 2014. “Tracking of Physical Activity During Adolescence: The 1993 Pelotas Birth Cohort, Brazil”. Revista De Saúde Pública 48 (6): 925-30. https://doi.org/10.1590/S0034-8910.2014048005313.