The study is devoted to the problem of terminological confusion in the concepts of “rhythmic gymnastics” and “classical aerobics”. We present a comparative description of two types of motor activity: rhythmic gymnastics and classical aerobics. The comparison is carried out for 12 criteria: the content of the classes (equipment); specific exercise technique; the physical qualities developed in the classroom; method of exercise; the structure and content of parts of lessons; music; methods of constructing combinations of the motor; pedagogical control; the predominant nature of the energy supply of muscle activity; requirements for equipment; equipment of the hall; instructor’s commands. On the basis of the conducted pedagogical experiment, the methods of the effectiveness of rhythmic gymnastics and classical aerobics is shown. Changes in the indicators of physical fitness of high school students taking part in the experiment are revealed.

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Health training based on aerobic exercise continues to occupy a leading position in modern fitness. Among them, aerobics on step-platforms occupies a special place. It is proved po- sitive influence of step aerobics on the cardiovascular system, respiratory system, musculoskeletal system, etc. It is important when doing any kind of aerobics to watch over students. The value of heart rate is one of the most objective indicators of the body’s response to stress. The problems of load management during the step aerobics classes both by the instructor and by the students themselves remain relevant. We detected pulse response of students in the individual steps of step aerobics performed on the steppes of in different heights and with different amplitudes of hand movements. Low heart rate was observed when performing steps on a low degree without hand movements (with the exception of Mambo), the highest rates – on a high degree with hand movements of large amplitude. The greatest increase in heart rate is observed when performing steps Chasse, Cha-cha-cha, Lift side, the smallest – V-step, Mambo, Basic step. However, the performance of all the selected steps on the lower step with the movements of the hands of the average amplitude gave a larger increase of the pulse response than if these steps are performed on a high degree without the hand movements. It is proved that a greater increase in heart rate leads to the addition of hand choreography of different amplitudes than the increase in the height of the step. In this regard, it can be noted that many instructors do not deservedly pay little attention to the choreography of hand movements, adjusting the intensity only with the help of changing the height of the step. Knowledge of the pulse reaction of those engaged in various steps of step aerobics will allow the instructor to plan and adjust the load more accurately in the classroom.