Whys and hows of physical exercise for children / Hamar D.. Vnitřní lékařství. The 6th Central European congress on obestiy (CECON) and the 15th Slovak congress on obesity 2017 : october 5 - 7, 2017 Bratislava : abstract book Roč. 63, č. 9, suppl. 2 (2017), s. 2S42