TY JOUR TI IMPROVING SPEED AND STRENGTH QUALITIES IN THE TRAINING OF THE LONG JUMP WITH A RUN-UP KW planning KW improvement KW speed and strength qualities KW long jump KW athletics KW physical exercises KW motor skills JO Scientific Papers Collection of the Angarsk State Technical University AU Yaroshevich, I.N. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»