“…It was proved that prophylaxis measures are purposeful only at early stages of in work of muscular system. Traditional approach in the form of prophylaxis examination can not give confident information about initial stages of child organism's muscular work imbalance (Razumeiko, 2015b). It is important to substantiate selection of adequate tests (Khudolii, Iermakov, & Prusik, 2015;Khudolii, Iermakov, & Ananchenko, 2015) and pedagogic control over schoolchildren's motor qualities (Ivashchenko, Yermakova, Cieslicka, & Muszkieta, 2015;Ivashchenko, Yermakova, Cieślicka, & Śukowska, 2015;Ivashchenko et al, 2016).…”