RT info:eu-repo/semantics/article T1 Effect of rules changes on water polo shooting performance according to the final classification: high, medium and worst level. A1 Borges Hernández, Pablo José A1 Argudo Iturriaga, Francisco Manuel A1 García-Marín, Pablo A1 Ruiz-Lara, Encarnación A2 Didácticas Específicas K1 team sport K1 ranking K1 situational frameworks K1 rule modification AB Introduction: The aim of this study compare the influence of rules changes on shots performance consideringthree different levels, in the final classification, between two male European championships with different rules.Material and Methods: All shots made by the first, second, sixth, seventh, eleventh and twelfth classified in27th European Championship in 2006 (Belgrade, Serbia) and all shots made by the first, second, eighth, ninth,fifteenth and sixteenth classified in 34th European Championship in 2020 (Budapest, Hungary) were analysed.Results: The total sample was composed of 3,467 shots (1,813 in Belgrade Championship and 1,654 inBudapest). The study was developed with an observational design. Three observers with more than 300h ofexperience in observational studies of water polo consensually quantified all the actions. Discussion: Theeffectiveness of the shots, considering only those that have taken place in equality and counterattack, showsgreater scoring efficiency by the HL teams against the WL; and specifically among the shots made with abalanced period score (+-1) (F = 3.637; p = .032; S.E. = .107) and unbalanced (+-2) (F = 3.835; p = .027; S.E. =.106) stand out. In inequality situations its noted the existence of lower efficiency for WL teams when shot fromthe center stands out against the HL. Conclusions: It is concluded that the regulatory changes have reduced theimportance, in the performance of the teams, of effectiveness in situations of inequality, giving rise to a moredynamic game, balanced according to the skill of the players and not their body size, but above all less static. YR 2021 FD 2021 LK http://riull.ull.es/xmlui/handle/915/34650 UL http://riull.ull.es/xmlui/handle/915/34650 LA en DS Repositorio institucional de la Universidad de La Laguna RD 17-may-2024