Evaluation of the relationship between general motor coordination and game performance of football players due to different biological age.

Title: Evaluation of the relationship between general motor coordination and game performance of football players due to different biological age. Objectives: Finding the relationship between the level of the level of motor coordination and the subjective assessment of game performance of football players by the coach due to biological age and the different pace of biological maturation of football players in pupils categories (U12-U14). Methods: The research group consisted of 43 players (average age 12.8±1.0 years) from pupils categories (U12-U14) from the professional club in the Czech republic. The method of dual energy X-ray absorptiometry (DEXA) was used to determine biological age. The Körperkoordinationtest für Kinder (KTK) was used to assess the level of motor coordination. Game performance was evaluated using a questionnaire filled out by the coaches of the individual categories. Results: Of the entire research population, 65,12 % of players achieved verbal ratings of "excellent", 32,55 % "above average" and 2,33 % "average". The most correlated variable with the performance evaluation was the subtest from the KTK "jumps on one leg", which had a correlation of 0,43. The game performance questionnaire correlated only 0,13 with the motor quotient from the KTK test. Playes with the best..