MOTOR PERFORMANCE AS A FACTOR OF LIMITING MOTOR CAPABILITIES OF SOCCER PLAYERS
The purpose of the study is to study the GPS parameters, measured by inertial units, of motor performance as factors limiting the motor capabilities of soccer players, determined by the test values of the functional movement screen (FMS). 40 soccer players (age 16,8±2,.1 years; height 168,8±1,6 cm, weight 69,5±5,3 kg) were tested in training sessions (n=149) using the Catapult global positioning system (Optimeye S5; Catapult Innovations of Australia, Melbourne). The parameters of inertial high-intensity movement (IMA High>3,5 m/s<sup>-1</sup>) were recorded: acceleration (IMA acceleration High), deceleration (IMA deceleration High), change of direction to the left (IMA Cod Left High), change of direction to the right (IMA Cod Right High), jumps (IMA jump High). Functional motion screen (FMS) was performed twice during the study period. The diagnosis included 7 test exercises, in each of which the athlete could get from 0 to 3 points. There was a strong inverse correlation between the acceleration parameter and the FMS test exercises: the rotary stability of the right side (r=-0,917, P=0,018) and the overall score (r=-0,844, P=0,011); a strong direct correlation between the inertial high-intensity deceleration indicator and the FMS test scores: deep squat (r=0,759, P=0,013), hurdle step with the right foot (r=0,713, P=0,015), in-line lunges on the left (0,863, P=0,016) and right (r=0,879, P=0,011) legs, rotary stability of the right side of the athletes' body (r=0,749, P=0,013), overall score (r=0,.753, P=0,015); between inertial high-intensity changes of directions to the left and FMS test exercises: in-line lunge on the right leg (r=0,713, P=0,014), active raise of the right straight leg (r=0,935, P=0,011), mobility of the left side of the shoulder (r=0,717, P=0,014), overall score (r=0,912, P=0,012); between the indicator of high-intensity inertial changes of direction to the right and FMS test “in-line lunge on the left leg” (r=0,912, P=0,012); between jump-based inertial high-intensity activity and test scores in the following exercises: deep squat (r=0,827, P=0,012), hurdle step (r=0,771, P=0,013), mobility of the left shoulder (r=0,986, P=0,011). The parameters of inertial high-intensity movement (IMA High>3,5 m/s<sup>-1</sup>) can be considered as factors limiting the motor capabilities of soccer players. The most significant functional deficiencies are manifested in tasks related to deep squats, trunk stabilization and mobility of the lower limbs, as well as a large prevalence of asymmetry of the right and left sides of the body.