ВЛИЯНИЕ НА СМЕСЕНОТО ОБУЧЕНИЕ ПО ФИЗИЧЕСКО ВЪЗПИТАНИЕ И СПОРТ  ВЪРХУ ДВИГАТЕЛНИТЕ СПОСОБНОСТИ НА 11–12 ГОДИШНИ УЧЕНИЦИ Надежда Борисова Костова IMPACT OF THE COMBINED TEACHING IN PHYSICAL EDUCATION AND SPORT ON THE MOTION ABILITIES OF 11–12-YEAR-OLD PUPILS Nadezhda Borisova Kostova   Abstract: Mankind is subjected during these last years to the aggressive influence of a virus, […]