Becoming specific biological bicyclists 12–13 years under act of the specific loading Journal title: Slobozans`kij Naukovo-Sportivnij Visnik [Slobozhanskyi Herald of Science and Sport] Authors: Prudnikova М.| Харьковская государственная академия физической культуры, Mulik V .| Харьковская госу... Subject(s): Education, Sports and Recreation, Rehabilitation, Health and Wellness