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ORAL ABSTRACTS - THURSDAY, 21 MAY 2015sided games. Although this indicates that team dynamics around transition moments differ fromregular play, the outcome of a transition moment appears to depend on other factors.S09.4Determinants of physical match performance in youth football players: neuromuscularaspectsDarragh R Connolly(1), C Castagna(2), L Francini(1,2), A Bosio(1), M Induni(1), E Rampinini(1)(1) Human Performance Laboratory, MAPEI Sport Research Centre, Olgiate Olona, Varese, Italy(2) Football Training and Biomechanics Laboratory, Italian Football Federation (FIGC) TechnicalDepartment, Coverciano, Florence, ItalyThe purpose of this study was to investigate the relationships between neuromuscular characteristicsand physical match performance in youth football players. Eighty-six youth players (U14 to U17)performed a number of neuromuscular evaluations: vertical jump, single sprints (10-m and 30-m)and repeated-sprint ability (RSA, 5x30-m) test. Peripheral neuromuscular function of the right kneeextensors (peak torque, PT) was measured using electrical stimulation during a repeated 180°changes of direction (COD) test, consisting of 4 levels with increasing intensities. Players’ yearsfrom peak height velocity (Y-PHV) was also calculated. A 20-Hz GPS system measured matchperformance variables: total distance, distance covered above 18 km•h-1 (DS18), accelerations anddecelerations. Equivalent distance and distance with metabolic power above 23 W•kg-1 (DP23)were also monitored. Physical match performance increased with age (e.g. DS18, from 3.8±2.0 to7.4±3.8 m•min-1, p