Abstract
In today’s leading football training centres, state-of-the-art performance diagnostic systems such as the “Footbonaut” allow controlled and standardized assessments of physical and mental components of agility, e.g. speed of action and ball control, that are considered to be decisive for talent identification and development. However, effects of induced physical and mental strain on performing football-specific practice patterns remain to be elucidated, particularly in youth players, and, thus, characterize the purpose of this study. 33 randomly assigned competitive football players (U14 to U16) performed a standardized Footbonaut practice pattern (i.e. 20 balls randomly drawn at 50 km/h each), prior to and immediately after either mentally demanding tasks (MDT; n = 11; continuous Vienna Test System’s Stroop task and determination test), physically demanding tasks (PDT; n = 11; consisted of 4 × 4 min of football-specific high-intensity intervals with 3 min of active recovery in between) or a control condition (CON; n = 11). Continuous heart rates (HR) as well as self-perceptions of fatigue were assessed. Main findings revealed performances for speed of action (p = 0.44; f = 0.01) and ball control (p = 0.15; f = 0.03) that were not modulated in the face of induced physical and mental strain as indicated by increased HR following PDT (p < 0.001; d > 0.8), or in the face of increased self-perceptions of fatigue following PDT and MDT (both p < 0.001; both d > 0.8) compared to CON. This is in line with a suggested talent factor and previous reports on motivational trade-off aspects in youth players. However, the present study’s short-timed practice patterns make it difficult to reliably compare a measuring sensitivity to complex football-specific movement behavioural and technical proficiencies with respect to mental and physical strain of longer-lasting football games and, thus, need further investigation in favour of improving talent identification and development using the Footbonaut.
Zusammenfassung
Heutzutage ermöglichen modernste leistungsdiagnostische Systeme wie der „Footbonaut“ in führenden Fußballtrainingszentren die kontrollierte und standardisierte Beurteilung physischer und mentaler Komponenten der Wendigkeit und Aufgewecktheit, z. B. Handlungsschnelligkeit und Ballkontrolle, die als entscheidend für die Talenterkennung und -entwicklung gelten. Jedoch bleiben die Auswirkungen induzierter physischer und mentaler Belastungen in der Umsetzung fußballspezifischer Übungsformen unklar, insbesondere bei Nachwuchsspielern. Dies zu untersuchen ist das Ziel der vorliegenden Studie. So führten 33 zufällig zugewiesene Nachwuchsfußballspieler (U14 bis U16) standardisierte Footbonaut-Übungsformen aus (d. h., 20 zufällig ausgegebene Bälle, jeweils mit einer Geschwindigkeit von 50 km/h), vor und direkt nach entweder mental fordernden Aufgaben (n = 11; „mental demanding tasks“, MDT; fortlaufender Stroop-Test gemäß dem Wiener Testsystem), physisch fordernden Aufgaben (n = 11; „physically demanding tasks“, PDT; bestehend aus 4 × 4 min fußballspezifischen Intervallen hoher Intensität mit 3 min aktiver Erholung dazwischen) oder einer Kontrollbedingung (n = 11; „control condition“, CON). Fortlaufend wurden die Herzfrequenz (HF) sowie die selbst wahrgenommene Beanspruchung gemessen. Als zentrale Erkenntnisse zeigten die Handlungsschnelligkeit (p = 0,44; f = 0,01) und die Ballkontrolle (p = 0,15; f = 0,03) keine Veränderungen durch eine induzierte physische oder mentale Belastung, welche sich in einer erhöhten HF nach PDT (p < 0,001; d > 0,8) oder einer erhöhten selbst wahrgenommenen Beanspruchung nach PDT und MDT (beide p < 0,001; beide d > 0,8) verglichen mit CON ausdrückte. Dies ist in Einklang mit einem naheliegenden Talentfaktor und vorangegangenen Berichten zu motivationalen Wechselwirkungsaspekten bei Nachwuchsspielern. Allerdings erschweren die zeitlich kurzen Übungsformen der vorliegenden Studie einen verlässlichen Vergleich hinsichtlich der Messsensitivität für verhaltensbezogene und technische Leistungen bei komplexen fußballspezifischen Bewegungen in Bezug auf mentale und physische Beanspruchungen in länger dauernden Fußballspielen. Somit werden weitere Untersuchungen zugunsten einer Verbesserung der Talenterkennung und -entwicklung unter Verwendung des Footbonaut benötigt.
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Acknowledgements
The authors would like to extend their sincere gratitude to all youth football talents for spending some of their valuable pre-season practice time to participate in the study. We further wish to thank the TSG 1899 Hoffenheim for enabling us to test in the Footbonaut and for providing supportive staff members during data collection.
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T. Vogt, S. Gassen, S. Wrede, J. Spielmann, M. Jedrusiak-Jung, S. Härtel and J. Mayer declare that they have no competing interests.
All participants and their legal guardians provided written informed consent. The study was approved by the Human Research Ethics Committee of the German Sport University Cologne in compliance with the Declaration of Helsinki.
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Vogt, T., Gassen, S., Wrede, S. et al. Football practice with youth players in the “Footbonaut”. Ger J Exerc Sport Res 48, 341–348 (2018). https://doi.org/10.1007/s12662-018-0514-3
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DOI: https://doi.org/10.1007/s12662-018-0514-3