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CHANGES IN VEGETATIVE BALANCE OF YOUNG DANCERS TAKING STABILOMETRY TESTS (1.49 Mb, pdf) Read
Authors:
Zakhareva Natalia Nikolaevna
Malieva Elena Igorevna
Annotation:

The aim is to reveal age-related peculiarities of functioning of postural and autonomic nervous systems of dancers in pre-pubertal, pubertal and post-pubertal periods, taking «Romberg balance test» with two feet together and alternating right and left legs, with eyes open and eyes closed. Methods and organization of research. The research focused on evaluation of vegetative balance and vegetative reactivity of young dancers of various ages practicing sport ballroom dancing and having obtained high achievements at competitions. Evaluation of vegetative balance occurred at rest and during «Romberg balance test» with two feet together and alternating right and left legs, with eyes open and eyes closed. Spiroarteriocardiorhythmograph device was used (SAKR device, spiroarteriorhythmocardiograph elaborated in Saint Petersburg). The study involved 31 regularly practicing young dancers aged 7-10 (1st group) – 11 people; aged 11-14 (2nd group) – 12 people; and aged 15-19 (3rd group) – 8 people. Research results. The first group of young dancers had normotonic type of autonomic nervous system regulation of heart rate variability (ANSR HRV) – 72,72%, LF/HF>nu – 0,42±0,083; the second group of young dancers had vagotonic type of autonomic nervous system regulation of heart rate variability (ANSR HRV) – 27,2%, LF/HF>nu – 0,87±0,131. In determining typological features of regulation of SBP rate 2 types were distinguished: sympathicotonic type – 63,6%, normotonic type – 36,3%. In determining typological features of regulation of DBP rate 2 types were distinguished as well: sympathicotonic type is most common – 72,7%, normotonic type – 27,2%. Typological characteristics of regulation of breathing rhythm were significantly represented by normotonic type – 81,8% and rarely by vagotonic type – 18,1% (vagotonic type is considered to be optimal for regulation of variability of breathing rhythm). Evaluation of changes in vegetative reactivity revealed that girls in their pubertal period had demonstrated the most evident changes in vegetative balance during functional stabilograph test. Furthermore, “Romberg balance test” with two feet together performed by athletes of three age groups with vagotonic type of autonomic nervous regulation of heart rate variability revealed evident tension of intersystem relations, which demonstrates a high-tension degree of adaptation processes. Conclusion. Evaluation of postural system functioning is essential when practicing sport ballroom dancing. Stabilometry is an informative method for such evaluation. Vegetative reactivity is an important criterion reflecting the process of young dancers’ adaptation to physical exercises, and spiroarteriocardiorhythmography method carried out before and after performing stabilometry tests gives an opportunity to assess it. Regardless of the age of young dancers, the greatest changes in the analysis of autonomic nervous regulation of heart rate variability occur after having performed stabilometry tests in the spectra of heart and breathing rhythm variability.

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