Changes of indicators of high-speed and high-speed and power preparedness at volleyball players of 12–13 years old Journal title: Slobozans`kij Naukovo-Sportivnij Visnik [Slobozhanskyi Herald of Science and Sport] Authors: Shevchenko O.| Харківська державна академія фізичної культури, Харків, Україна Subject(s): Education, Sports and Recreation, Rehabilitation, Health and Wellness
