INTRODUCTION: Football research, notably in training load monitoring, has made great advances as a result of technological development (1). GPS and accelerometers parameters allow quantifying external load values (2). Accelerometry is a recent method to quantify the workload (3), providing important information of neuromuscular demands (4). The objective of our research is to analyze neuromuscular demands in SSGs, with and without GK, in three age groups through different Ac/Dec zones and PL. METHODS: Twenty-four football players participated in the study. The players belong to the U-12 (n=8), U-15 (n=8) and U-23 (n=8) age groups and play in clubs certified as formative entities by the Portuguese Football Federation. Participating players compete in the district football championships 7 and 9, national under-15 championship and U-23 Revelation League.The data were collected through GPS devices, certified by FIFA, Wimu ProTM, placed on the upper back of the trunk, using wimu-specific vests for this purpose. The tasks analyzed were The SSG1 - 4x4 and SSG2 - GK+4x4+GK, in a game space 20 x 30 meters. The data were analyzed using the Wimu Spro computer program.We used descriptive statistics (mean and standard deviation), t-test to compare between SSG and Anova One Way to compare between age groups. It was still the effect sizes. RESULTS: The use of GK promoted a higher neuromuscular intensity, being evident with the increase of Ac (U-12, SSG1 - 6.02±6.02, SSG2 - 12.58±10.00; U-15, SSG1 - 12.83±6.90, SSG2 - 21.99±14.18) and Dec (U-12, SSG1 - 11.71±7.97; SSG2 - 17.84±4.41; U-15, SSG1 - 14.65±7.61, SSG2 - 20.90±10.30) >3 m/s2.The effect size, with the use or not of GK, is large in the U-12 in Max Dec (ES=1.44), in the U-15 in Dec 1-2 m/s2 (ES=1.39) and Dec 2-3 m/s2 (ES=1.26) and in U-23 for PL (ES=1.49). There was also a very large effect on the use of GK in the age groups U-15 for Ac 1-2 m/s2 (ES=2.46) and PL (ES=2.41).Players age has a large effect size on SSG1 at Ac 1-2 m/s2 (ES=0.43), Ac >3 m/s2 (ES=0.59), Dec 1-2 m/s2 (ES=0.60), Dec 2 -3 m/s2 (ES=0.18), Dec >3 m/s2 (ES=0.27), Max Ac (ES=0.19) and PL (ES=0.24), in SSG2 to Dec 1-2 m/s2 (ES=0.22), Dec 2-3 m/s2 (ES=0.18), Max Ac (ES=0.20) and PL (ES=0.23). CONCLUSION: GK intrusion in 4x4 SSG is a promoter of higher neuromuscular activity of high intensity (>3m/s2), as a result of more accelerations/decelerations, with more evidence in the U-12 and U-15 levels. The use of GK has a big effect on PL in the U-15 and U-23 tiers. The age of the players is influencing the values in the different zones of accelerations/decelerations and PL in SSG1 . In SSG2 the age effect is not as evident in accelerations, but is more evident in decelerations, Max Ac and PL.
© Copyright 2022 27th Annual Congress of the European College of Sport Science (ECSS), Sevilla, 30. Aug - 2. Sep 2022. Julkaistu Tekijä Faculty of Sport Science - Universidad Pablo de Olavide. Kaikki oikeudet pidätetään. / Kääntänyt https://www.DeepL.com/Translator