Research results and methodology grounds of development speed-strength qualities of middle-aged school-children under increased radiation conditions are defended. Problem’s aspects were considered in connection with morpho-functional peculiarities of children with limited moving activity, factors, which define peculiarities of development speed-strength qualities of 12-14 years old school-children. Strengthening of health, level rise of physical children preparedness of school age, engrafting in to them asquired habits of healthy mode of life, today is one of most sharp problems of social policy. But about action of raised radiation on development of basic physical qualities into children of different century groups it's known insufficiently. Also follows to mark, that practically do not take researches, directed on exposure of methods effectiveness of complex development of physical qualities and improving from a health point of view of children, which adapt with view counteraction of to inauspiciouse cological factors. Actuality of our researches consists in that hastening of tempos of scientific and technical progress and called this of negative emotions, by from by contamination of nearby environment and lowering of impellent activity, become by main causes, which conduce to exhaustion of protective schoolboys organism mechanisms, derangement of immune defense, growth of clinical pathology. The Inauspicious ecological conditions force to search health backlogs of child organism, to realize a practical children improving from a health point of view, in that number, by methods of physical education. Settlement of this pedagogic problem by dint of experimental state study and methods of physical children preparation in ecologically inauspicious conditions is necessary in tie with practical lack of data about rational methods use and methods of physical children education of middle school age in zone of raised radiation. Seen out over 10 years after failure on research Сhernobyl AES of physical schoolboys s tate of 12-14 years, which permanently reside on territories with raised radio-active background bear witness to that on majority of indexes of physical development, physical capacity and development of speed-power qualities for period from 1985 on 1996 year took place unsimple changes: not set clearly expressed lag in the physical making (Р>0,05), but for indexes of speed-power qualities, weighing with testing of 1985 year, they appeared considerably lower (Р<0,05 (0,001).) Inculcation in practician of our methodical developments allowed essentially to raise development effectiveness of speed-power qualities and educationally process from physical education with children of middle school age as whole: - differentiated approach to methods choice and development methods of speed-power qualities positively took development level on the rebound of their separate parameters.