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ORAL ABSTRACTS - SATURDAY, 23 MAY 2015SATURDAY, 23 MAY 201509:00 - 10:15S40 TACTIC AND TECHNICS40.1Intensity and technical actions in female youth soccer gamesChristina Ørntoft(1), MN Larsen(1), TB Andersen(2), LS Rasmussen(2), MB Randers(1), PeterKrustrup(1,3)(1) Copenhagen Centre for Team Sport And Health, University of Copenhagen, Copenhagen,Denmark(2) Department of Public Health - Sport Science, Aarhus University, Denmark(3) Sport and Health Sciences, College of Life and Environmental Science, St Luke’s Campus,University of Exeter, Exeter, United KingdomThe purpose of this study was to evaluate activity profile, heart rate and technical performance in7v7 and 8v8 football games for 9-10-year-old girls (U11). A total of 32 female youth playersparticipated in the study, all playing 20-min 7v7 and 8v8 games with 160 and 223 m2 per player,respectively. Activity profile, number of technical actions and heart rate (HR) were measuredduring the games using 5-Hz GPS, video filming and HR monitors. The number of technical actionswas higher in 7v7 than in 8v8 games (34±19 (±SD) vs. 28±14, P=0.03, d=0.37) as was the numberof successful actions (25±16 vs. 20±12, P=0.01, d=0.35) with no difference in the success rate forthe technical actions (70±13 vs. 69±14%, P=0.63, d=0.07). No difference was found between 7v7and 8v8 in total distance covered (1574±251 and 1622±281 m, P=0.66, d=0.18), peak speed(19.5±2.6 and 20.7±1.5 km∙h-1, P=0.16, d=0.56) and mean HR (169±8 and 172±10 bpm, P=0.87,d=0.30). Distance covered at the highest running speeds of >16 km∙h-1 was lower in 7v7 than in8v8 games (34±24 vs. 63±34 m; P=0.018; d=0.98), as was the number of entries into this speedzone (8±5 vs. 13±7, P=0.006, d=0.82). In conclusion, there were a higher number of technicalactions and successful actions were found in 7v7 than in 8v8 games, but the players covered moreground with high-speed running in 8v8. The study also revealed that heart rate and number oftechnical actions and running bouts were high in both game formats for U11 girls, with nodifference between formats.S40.2Attacking and defending team behaviour in 8v8 and 11v11Sigrid Olthof(1), WGP Frencken(1,2,3), KAPM Lemmink(1,2)(1) Center for Human Movement Sciences, University of Groningen, University Medical CenterGroningen, The Netherlands(2) School of Sport Studies, Hanze University of Applied Sciences Groningen, The Netherlands(3) Football Club Groningen, The Netherlands164