| Abstrakt: |
This paper aims at showing which are the particularities of the biomechanical characteristics in learning the acrobatic exercises on balance beam by the junior gymnasts of category III. Material. The study was conducted within the Gymnastics Department of the „Dinamo" School Sports Club of Bucharest, over a period of 2 years (2018- 2019). The subjects of the study were 4 gymnasts level 3 (9-10 years old). The biomechanical analysis of the acrobatic exercises on balance beam was performed using the Physics ToolKit program. The linear and branching algorithmic programming was employed for learning and making better the acrobatic exercises specific to this gymnastics category. The statistical analysis and the graphical representation of data were done by means of KyPlot program. The performances on balance beam were monitored in three national competitions (C): C1 --National School Championship, junior III, level 1, 2018; C2 - National Championship for Juniors III, level 1, 2018 and C3 - National School Championship, junior III, level 2, 2019. Results. This study highlights the efficiency of implementing the algorithmic programs for improving the acrobatic exercises on balance beam in juniors III, level 1 and 2. The dynamics of acrobatic exercises learning according to the classification program and the improvement of these exercises led to the good results achieved during the national competitions. The video biomechanical analysis focused on the study of the technical execution of two or three acrobatic elements and the round-off back tuck dismount. At the same time, the trajectory of the body general center of mass and the angular velocity of the segments of the body in each moment and position of the exercise phasic structure were analyzed. Also, the particularities of the kinematic characteristics consistent with the movement general bases, direction of execution (from right to left or vice versa), amplitude of the split, rhythm -- tempo of execution (succession of arms-legs movement) and execution velocity were identified. Conclusion. The use of the computerized video method for the biomechanical analysis of the routines on balance beam helped to identify the particularities of technique basic elements, the deeper knowledge of the phasic structure and last but not least the execution faults. [ABSTRACT FROM AUTHOR] |
