Body mass index, fitness and physical activity from childhood through adolescence
Katja Pahkala, Miika Hernelahti, Olli J Heinonen, Päivi Raittinen, Maarit Hakanen, Hanna Lagström, Jorma S A Viikari, Tapani Rönnemaa, Olli T Raitakari, Olli Simell
British Journal of Sports Medicine Jan 2013, 47 (2) 71-77; DOI: 10.1136/bjsports-2011-090704