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• W2580898881 abstract "IntroductionKicking is one of the most fundamental ball-based soccer skills. Its execution can be divided from the perspective of the kicked ball's movement into kicks with high ball velocity and kicks with maximal accuracy. When trying to achieve high ball velocity and long trajectory, instep kick is used. The side-foot kick is the most accurate kick over shorter distances and it is the most frequently used type of soccer kick. There are a number of studies dealing with biomechanics and movement kinematics (Levanon and Depena, 1998) in terms of spatial analysis and kinematics of leg segments during the instep kick and also in terms of angular positions - time and angular velocity curve during the kick as well as linear kinematics of the involved joints (Lees, 1996; Lees and Nolan, 1998). Kicking is a crucial moment in every match since its number and efficiency influence the final score; therefore, soccer players should master it so that they would also be able to successfully kick or pass the ball when fatigued. Kicking technique is very important and it is necessary to realize that speed and accuracy of kick are influenced by several mechanisms and factors (Barfield, Kirkendall & Yu, 2002). The angle of running to the ball is one of the most important aspects which significantly affects soccer kick speed (Isokawa & Lees, 1988; Kellis & Katis, 2004; Opavsky, 1988). Kicking accuracy, or inaccuracy, is influenced by many factors ranging from mistakes in a player's approach to the kick, position of the supporting leg during the kick, movement of the kicking leg - its swing and placing the foot on the ball (so called contact properties). Ball speed depends on the velocity of the foot (segments) upon impact as well as the quality of ball - foot impact (Asai et al., 2002; Bull-Andersen et al., 1999; Lees and Nolan, 1998; Levanon and Dapena, 1998). Position of the supporting leg is very important because the supporting leg is considered to be responsible for body stabilization and it is assumed that it has a positive effect on kicking performance (Lees, Asai, Andresen, Nunome & Sterzing, 2010).The purpose of the present study is to identify and describe the relationship between speed and accuracy of instep kick in experienced soccer players.Material and methodStudy sampleThe monitored group consisted of U19 category soccer teams (n = 20, age = 18.4 ± 0.4 years, body height = 182.7 ± 5.8 cm, body weight = 77.0 ± 6.3 kg). Participants were regularly trained by qualified coaches, took part in training sessions 6-times a week and played one match a week and they had been playing soccer for 11.2 years on average. Participants recruited were not injured or recovering from injury at the time of testing.Assessment of kicking performance (ball velocity and accuracy)The ball velocity was recorded after instep kick using a STALKER ATS (Applied Concepts, Inc., Plano, Texas, USA) radar gun. Tests were carried out in the course of one day after a standard 20 minute warm-up when the players performed shots at goal with the dominant leg. The players conducted 3 maximum effort trials with the dominant leg (DL) at a distance of 11 m from the measuring device with the aim of transferring the ball into the target (centre of the goal). The target was formed using 2 red expanders (width of 2 cm) that were stretched in vertical and horizontal planes. Kicking accuracy was recorded using 2D kinematic analysis. Kicking accuracy was determined as the absolute distance between the centre of the ball and the target using TEMA Biomechanica software, version 2.3.Statistical analysisThe processed data are presented in Tables and Figures. To determine the relationship between the variables we used Pearson's correlation analysis. To reject the null hypothesis we worked with the risk of p" @default.
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• W2580898881 date "2016-06-01" @default.
• W2580898881 modified "2023-09-26" @default.
• W2580898881 title "Relationship between Speed and Accuracy of Instep Soccer Kick" @default.
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