BACKGROUND No study has investigated whether newcomers to professional soccer have a different injury rate than established players. PURPOSE The primary objective was to investigate whether being a newcomer to professional soccer influences injury rates. The secondary objective was to evaluate whether playing position and player age influence injury rates. STUDY DESIGN Cohort study; Level o...

The purpose of this study was to analyze the leadership power perception of amateur and professional soccer coaches and players according to their belief in good luck or not. Data collected from 165 male soccer coaches and 870 male soccer players including professionals and amateurs. The coaches had a mean age of 40.24 years (SD = 8.40) and had been coaching for an average of 8.56 years (SD = 6...

Excellent physical performance of soccer players is inevitable for the success of a team. Despite of this, a large-scale, quantitative analysis of the maximal speed of the players is missing due to the sensitive nature of trajectory datasets. We propose a novel method to derive the in-game speed profile of soccer players from event-based datasets, which are widely accessible. We show that eight...

The aim of current research was to investigate kinematics of lower extremity during side step cutting maneuver related to anterior cruciate ligament (ACL) injury in different male and female soccer positions. Therefore, 18 male and 18 female soccer players were tested for side step cutting maneuver. Kinematics variables (hip and knee flexion and knee valgus) were captured by one camera at 50 Hz...

37 38 The purpose of this study was to evaluate the anthropometric and performance characteristics 39 of high level youth female soccer players by annual-age category (U10-U16). Data were 40 collected from 157 female soccer players (U16; n=46, U14; n=43, U12; n=38, U10; n=30), 41 recruited from three high level female soccer academies in England. Players completed 42 assessments of anthropometr...

BACKGROUND To guarantee equal chances for different age groups, age-related tournaments for male and female players have been established in soccer. However, as registration at birth is not compulsory in some countries, other methods of age determination are needed to prevent participation in the incorrect age group. OBJECTIVES To evaluate the age of soccer players of international U-17 compe...

In this paper, a novel method for tracking multiple soccer players based on a support vector machine (SVM) and a particle filter is proposed for a monocular fixed soccer video. This paper considers three main topics. First, the state of a particle filter presented in a 3D world coordinate space, instead of a 2D image coordinate space, provides a more realistic model tracking because depth consi...

The purpose of the study was to compare the anthropometric, functional and sport-specific skill characteristics and goal orientations of male youth soccer players at the extremes of height and skeletal maturity in two competitive age groups, 11-12 and 13-14 years. The shortest and tallest players, and least and most skeletally mature players (n = 8 per group) within each age group were compared...

This paper presents a method for generating synthetic views of a soccer ground starting from a single uncalibrated image. The relative affine structure of the players is computed by exploiting the knowledge of the soccer ground geometry and the fact that the players are in vertical positions. Then, novel views are generated using the “plane+parallax” representation to reproject points.

Controversy surrounds the risk of heading a soccer ball. The research objectives were to determine the statistical distributions of head accelerations during soccer heading for adult versus youth players, to compare results with known safe levels, and to suggest steps to reduce risk for children. Monte Carlo simulations of large numbers of head-ball impacts were done using equations of motion b...