The monograph is a result of our pedagogical research aimed at obtaining and enlarging the knowledge on evolution changes in the gait of pupils aged 11 - 15 and possibilities of influencing them by means of compensatory exercises within the framework of P.E. and sport lessons. Object of the study were 32 pupils attending elementary school in Nitra, who were observed in consecutive years. Totally 5 measurements of gait were executed. Between the measurements 2 and 3 experimental factor was implemented during a 4-month-long period. The method by Klein and Thomas modified by Mayer was used for...