Features of motion coordination of footballers with musculoskeletal system disorders when shooting

In the control group the footballer in the preparatory phase shows a shift to the right of the center of pressure (CP). Before the shot CP moves back a little. The trajectory of the shot is direct. After the shot CP moves to the left. In the main group the footballer in the preparatory phase shows pronounced fluctuations of CP. Before the shot CP deviates back significantly, the trajectory of CP in the phase of the shot is a little curved. After the kick there is a marked CP fluctuation in the sagittal plane. When kicking with the inside of the foot footballers with musculoskeletal system disorders (MSD) show differences in the basic parameters of equilibrium. The scatter in the frontal plane in the study group was significantly lower than in the control group. Variation in the sagittal axis of the players with MSD was significantly lower than that of the players without the disease. Offset by the sagittal axis of the players of the control group was significantly higher than that of the players with MSD. In addition, when shooting with the inside of the foot there is a difference in the group of athletes with MSD and the control group in the following indicators: the average speed of CP, the area of the ellipse, the area of statokinezigram change rate, the average linear velocity. All these indicators of balance were significantly lower than in the control group of athletes. When the ball is hit by the middle part of the instep in the group of footballers with MSD the front and sagittal variation is significantly lower than in the control group of athletes. Also, compared with the control group the average speed of CP, the area of ellipse, the area of statokinezigram change rate, the average linear velocity are significantly reduced. However, the quality of the balance function is significantly higher than in the control group of athletes. Thus, the players with MSD have motion coordination disorders associated with the displacement of the common center of gravity of the body, which leads to the break of the linear movements. The trajectory of CP when shooting is curved in all phases. However, athletes compensate for these disorders by reducing such factors as variation in the frontal and sagittal planes, the area of the ellipse, the rate of change of statokinezigram, the average linear velocity, the average velocity of the center of pressure. An increase in the quality of the equilibrium function is also noted.

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