SUMMARY Peculiarities of organizm to adaptation physical strain are very relevant problem to sport and its range. Relative narrow and particular purpose is raised in the solution of this problem: to estimate conception of professionals working in athletic club and those who goes in for sports there – abaut the importance of rest intervals in training for seeking result during the physical exercising also to ascertain the influence of rest intervals between physical strains to peculiarities of fast adaptacion. Results of the research are presented in this study; it joins together, first – results of survey of physical culture and sport also health professionals; second – results of survey of individuals who attends health strengthening training; third – results of survey of topical muscular blood circulation intensity during the time of rest intervals between physical strains; fourth – results of survey of functional condition index alternation during the rest intervals between physical strains. Results which were received showed, that people attending athletic club takes interest in optimal purport of training, though they are lacking in information about the lasting of rest intervals and its significance. In majority, trainers of health groups do not designate the time people must rest since the next repeat of exercise. Striving of wellbeing and pretty look are dominant reason of exercising people to attend trainings of healf strenthening. Other... [to full text]