“…It is proved that physical exercises suitable to aged and individual peculiarities of schoolchildren cause the expressed influence on their health, encouraging improvement of physical working capability and motor readiness, https://dx.doi.org/10.15405/epsbs.2018.09.02.39 Corresponding Author: Igor A. Krivolapchuk Selection and peer-review under (Janssen & Leblanc, 2010;Global recommendations…, 2010;Resaland, 2016). The physical working capability role, as the most important condition of children's FS optimization, educational activity of which passes more often under the raised informative tensions, psychical tension, mental fatigue and expressed hypokinesia is the most important at critical ontogenesis periods, characterized by qualitative morphofunctional reformation of main physiological systems against the background of complicating interrelations between biological and social factors of development (Brjazgunov, 2008;Razvitie mozga…, 2009;Silk, 2009;Spear, 2009;Fiziologija razvitija…, 2010;Berk, 2012;Quas, 2014;Krivolapchuk, 2017).…”