TY JOUR TI DYNAMICS TRAINING MIDDLE DISTANCE RUNNERS IN GROUPS OF SPORTS IMPROVEMENT KW Training process KW group of sports improvement KW runners at mid-range KW the development of student sports. JO Scientific Papers Collection of the Angarsk State Technical University AU Yaroshevich, I.N. PY 2020 IS 2018 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»