Dynamics of schoolgirl physical health indices depending on organization of physical education teaching process

The aim of the research is to find out the dynamics of physical development, cardiorespiratory system and exercise performance indices in schoolgirls (7-18 years old) during the academic year depending on the organization of physical education teaching process. Materials and Methods. Two groups of schoolgirls (1-2 form, 6-7 form, 10-11 form) who attend physical education classes with full load were examined. The experimental group consisted of 38 girls, and the control group included 81 pupils. In the experimental group the physical education class activities were divided into 4 main cycles and intercycle periods lasting 4-5 weeks each. During the main cycles the schoolgirls attended 5 hours of physical training a week, and during intercycle periods - only 2 hours a week. The girls belonging to the control group attended 1-hour-physical education classes 3 times a week. The examination was conducted at the beginning and at the end of the academic year. The examination included the recording of the main anthropometric measurements (weight, height, chest circumference, wristle muscle strength and back strength), lung capacity, anoxia tolerance (timed inspiratory capacity), cardiac rate, and arterial blood pressure both at rest and uder standard step-ergometric loading. Exercise performance was defined using PWC170 test. Results. During the academic year the schoolgirls from the experimental group demonstrated much more increase in wristle muscle strength and back strength, external respiration function, resistance to hypoxia. They also demonstrated significant decrease in adaptive heart response to step-ergometric loading, and performance incoordination (in comparison to control group). Conclusion. When physical education class activities were organized in cycles, performance improvement in physical development, functional state of cardiorespiratory system, and exercise performance was observed during the academic year. Moreover, the differences between the compared groups increased with the age of the trial subjects