The U-13 players employed most of their visual search related with “space” compared with players from the U-15 and U-17 age groups. No other significant differences were found in other categories. The “space” category displayed significant differences in the number of fixations between U-13 (74.35☑2.41) compared to U-15 (58.78☑4.22) and U-17 (61.88☑6.44) soccer players. Results displayed significant differences in one of the categories. One-way ANOVA was performed to compare the three groups. The number and time of fixations made by players, in each stimuli category was analysed.
Visual search stimuli were grouped into five categories: “player in possession of the ball” “ball” “teammates” “opponent” “space”. Participants were presented with a video based test. Players were grouped according to their age group: U-13 (17), U-15 (17), U-17 (17). This system is used to verify gaze behaviour through visual focus. The instrument used to collect and analyse data was the Mobile Eye. The sample comprised 51 youth soccer players. The aim of this study was to assess the visual search strategy of soccer players from different age groups.
Regarding tactical performance, there is a lack of information on the topic in the current literature. In summary, the results of the analyzed studies show that the effect of physical fatigue on cognitive performance is inconclusive and that technical and physical performance are negatively affected. Finally, the only study that analyzed the tactical performance in the field showed an increase in the team’s collective tactical behavior, but did not include analysis of the players’ individual tactical actions. With regard to physical performance, studies have shown a reduction in sprint capacity and distances covered at high velocity. Regarding technical performance, negative effects of physical fatigue were found on the technical fundamentals of the pass, dribble and kick. Studies on cognitive performance have shown divergent results, varying according to the cognitive task employed and the physical protocol used. The results section was organized in four main dimensions: cognitive, technical, physical and tactical. A total of 12 articles met the inclusion criteria: i) healthy soccer players from any age group, competitive level or sex ii) exposure to physical fatigue iii) pre and post-physical fatigue conditions iv) players’ cognitive, technical, physical and tactical performances and v) no restrictions regarding the study design. For this systematic review, searches were performed in Pubmed, Web of Science and SPORTDiscus electronic database until October 3, 2020, following the guidelines of PRISMA. This study aimed to carry out a systematic review to analyze, describe and discuss the effect of physical fatigue on the performance of soccer players.
0 kommentar(er)
