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Anton Kalén, Ezequiel Rey, Alejandro Sal de Rellán-Guerra, Carlos Lago-Peñas
The aims of the current study were to analyze the evolution of players' age in the UEFA Champions League since the start of its modern-day format in 1992-1993 up until 2017-2018 and to determine how the players' age relates to their market value. The sample consisted of all players participating in the UEFA Champions League from the 1992-1993 to 2017-2018 seasons ( n = 16062). The following variables were used in this study: players' age, number of seasons in the club, number of Champions Leagues won, team performance, and market value of the player in the season...
2019: Frontiers in Psychology
I Romanet, N Graillon, M K Le Roux, L Guyot, C Chossegros, M De Boutray, J M Foletti
INTRODUCTION: With more than 270 million spectators, football - or soccer - is the most popular sport in the world. International football events generate many risky situations, including hooliganism and are an opportunity to analyze the incidence and the particularities of associated trauma. We sought to underline the potential rapid and brutal increase in maxillofacial trauma during a world-class competition. MATERIAL AND METHODS: A retrospective multicenter study of the epidemiology of maxillofacial traumas during the UEFA 2016 Cup was conducted...
January 11, 2019: Journal of Stomatology, Oral and Maxillofacial Surgery
David Matesanz, Florian Holzmayer, Benno Torgler, Sascha L Schmidt, Guillermo J Ortega
Professional football is a globalized game in which players are the most valuable assets for clubs. In this study, we explore the evolution of the football players' transfer network among 21 European first leagues between the seasons 1996/1997 and 2015/2016. From a topological point of view, we show that this network achieved an upper limit expansion around season 2007/2008, thereafter becoming more connected and dense. Using a machine learning approach based on Self-Organizing Maps and Principal Component Analysis we confirm that European competitions, such as the UEFA Champions League or UEFA Europa League, are indeed a "money game" where the clubs with the highest transfer spending achieve better sportive performance...
2018: PloS One
Moman A Mohammad, Sofia Karlsson, Jonathan Haddad, Björn Cederberg, Tomas Jernberg, Bertil Lindahl, Ole Fröbert, Sasha Koul, David Erlinge
OBJECTIVES: To study circadian rhythm aspects, national holidays, and major sports events as triggers of myocardial infarction. DESIGN: Retrospective observational study using the nationwide coronary care unit registry, SWEDEHEART. SETTING: Sweden. PARTICIPANTS: 283 014 cases of myocardial infarction reported to SWEDEHEART between 1998 and 2013. Symptom onset date was documented for all cases, and time to the nearest minute for 88%...
December 12, 2018: BMJ: British Medical Journal
David P Trofa, Peter C Noback, Jon-Michael E Caldwell, J Chance Miller, Justin K Greisberg, Christopher S Ahmad, J Turner Vosseller
Background: The majority of Achilles tendon ruptures are sports related; however, no investigation has examined the impact of surgical repair for complete ruptures on professional soccer players. Purpose: To examine the return to play, playing time, and performance of professional soccer players following Achilles tendon repair. Study Design: Cohort study; Level of evidence, 3. Methods: Union of European Football Associations (UEFA) and Major League Soccer (MLS) athletes who sustained a primary complete Achilles tendon rupture and were treated surgically between 1988 and 2014 were identified via public injury reports...
November 2018: Orthopaedic Journal of Sports Medicine
Rafael Oliveira, João Brito, Alexandre Martins, Bruno Mendes, Francisco Calvete, Sandro Carriço, Ricardo Ferraz, Mário Marques
Top European soccer teams that play in UEFA competitions often participate in one, two- or three-games per week. Therefore, it is necessary to understand the variations in training load (TL) according to each team's competitive schedule. The aim of this study was to quantify internal and external TLs within five microcycles: M4 and M5 - one-game weeks; M1 and M3 - two-game weeks; M2 - three-game week). The sample consisted of thirteen elite soccer players. A global positioning system (GPS) was used to measure the total distance covered and distances of different exercise training zones (1-5), the session ratings of perceived exertion (s-RPE) scores and the amount of creatine kinase (CK) created during daily training sessions for the 2015-2016 in-season period...
December 6, 2018: Physiology & Behavior
Mathieu Nédélec, Brian Dawson, Grégory Dupont
Nédélec, M, Dawson, B, and Dupont, G. Influence of night soccer matches on sleep in elite players. J Strength Cond Res 33(1): 174-179, 2019-This study examined the impact of night matches on the sleep/wake behavior of elite soccer players participating in the UEFA Champions League and French Ligue 1. A mixed method approach was used, combining objective sleep assessment with wrist activity monitors, and a survey to ascertain the sleep complaints after night matches (kick off after 18:00 hours). Most players (90%) indicated worse sleep in the nights after evening matches than after training days...
January 2019: Journal of Strength and Conditioning Research
Adam L Owen, Marco A Cossio-Bolaños, Gordon Dunlop, Mehdi Rouissi, Moktar Chtara, Nicola Luigi Bragazzi, Karim Chamari
Introduction: The stability of hematological status indices is a key determinant of optimal sport performance. The capacity to monitor hematological behaviors of elite soccer players may better explain the stresses placed upon physiological systems and the potential decrements in performance and physical capacity. The primary aim of this investigation was to examine the post-seasonal hematological status of professional top-level soccer players in response to seasonal match-play and training demands, in terms of the training practices, intensity, and loadings that they experience before, during, and after each season...
2018: Open Access Journal of Sports Medicine
José M Yagüe, Alfonso de la Rubia, Joaquín Sánchez-Molina, Sergio Maroto-Izquierdo, Olga Molinero
The aim of the present research was to observe the relative age effect on professional soccer players of the ten best leagues of the Union of European Football Associations (UEFA), according to the IFFHS (International Federation of Football History and Statistics). The sample consisted of 5201 professional players who participated in the professional leagues during the 2016-2017 season. The birth date of each player was classified in four quartiles (Q1, Q2, Q3 and Q4). The frequencies (fr) and percentages (%) of the birth quartiles were analyzed...
September 2018: Journal of Sports Science & Medicine
Fabian Wunderlich, Daniel Memmert
Betting odds are frequently found to outperform mathematical models in sports related forecasting tasks, however the factors contributing to betting odds are not fully traceable and in contrast to rating-based forecasts no straightforward measure of team-specific quality is deducible from the betting odds. The present study investigates the approach of combining the methods of mathematical models and the information included in betting odds. A soccer forecasting model based on the well-known ELO rating system and taking advantage of betting odds as a source of information is presented...
2018: PloS One
Philip Furley, Geoffrey Schweizer, Daniel Memmert
The present research investigated whether perceivers could detect who is playing at home or away in soccer matches based on thin slices of professional (Experiment 1) and amateur (Experiment 3) athletes' nonverbal behavior prior to the match and whether perceivers rated athletes playing at home relatively higher on behavioral dimensions (Experiments 2 and 3) linked to territoriality. In Experiment 1 ( N = 80), participants watched short videos depicting soccer players prior to a UEFA Champions League match and rated whether athletes were more likely to be playing at home or away...
April 2018: Evolutionary Psychology: An International Journal of Evolutionary Approaches to Psychology and Behavior
Rachael Murray, Magdalena Opazo Breton, John Britton, Jo Cranwell, Bruce Grant-Braham
BACKGROUND: Alcohol advertising is a key driver of alcohol consumption, and is prohibited in France by the Loi Evin. In 2016 the Danish brewer Carlsberg sponsored the UEFA Euro 2016 finals, held in France, and used the alibis 'Probably' and '…the best in the world' in place of Carlsberg in pitch-side advertising. We have quantified the advertising exposure achieved during the final seven games in the UEFA Euro 2016 championship. METHODS: Appearances of the Carlsberg alibis 'Probably' and 'the best in the world' were counted and timed to the nearest second during all active play in live coverage of quarter final, semi-final and final matches broadcast in the UK...
April 25, 2018: BMC Public Health
Jonas Werner, Martin Hägglund, Jan Ekstrand, Markus Waldén
BACKGROUND: Hip and groin injuries are common in men's professional football, but the time-trend of these injuries is not known. AIM: To investigate hip and groin injury rates, especially time-trends, in men's professional football over 15 consecutive seasons. STUDY DESIGN: Prospective cohort study. SETTING: Men's professional football. METHODS: 47 European teams were followed prospectively for a varying number of seasons between 2001/2002 and 2015/2016, totalling 268 team seasons...
April 24, 2018: British Journal of Sports Medicine
M Waldén, M Hägglund, H Bengtsson, J Ekstrand
The high injury rate among men's professional football players is well-known. Therefore, the Union of European Football Associations (UEFA) launched an injury study already in 2001. This study, the UEFA Elite Club Injury Study (ECIS), currently includes data from a total of 51 clubs from 18 European countries with more than 14,000 registered injuries. With the 21st  World Cup (WC) in Russia just around the corner, we have from our study identified a higher match injury rate and a higher proportion of severe injuries in the European Championships compared to the preceding club competitive seasons...
June 2018: Der Unfallchirurg
Rubén Maneiro Dios, Mario Amatria Jiménez
Research in soccer has traditionally focused on very specific aspects of the game, such as technical and physiological aspects, and has largely ignored important issues such as tactical performance and the role of individual players within the team. The aim of this study was to study the different relationships that Xabi Alonso, one of the world's best midfielders, establishes with his teammates during offensive play, and to investigate his connections with the pitch in terms of where his direct interventions started and finished, his use of technical actions, his involvement in set plays and interceptions, and his relationship with shots at goal...
2018: Frontiers in Psychology
Alan McCall, Gregory Dupont, Jan Ekstrand
BACKGROUND: Internal workload (ie, from training and matches) is considered one of the most important injury risk factors for elite European football teams, however there is little published evidence to support this belief. OBJECTIVE: We examined the association and predictive power of internal workload and non-contact injuries. METHODS: Five elite European teams, 171 players (age: 25.1±4.9 years; height: 181.6±6.7 cm; body mass: 77...
April 6, 2018: British Journal of Sports Medicine
Matthias Kempe, Daniel Memmert
This study investigated the level of creativity of goals scored in football. Therefore, all goals in the Football FIFA World Cup 2010 and 2014, as well as the Football UEFA Euro 2016 were qualitatively examined. Three Football experts evaluated the last eight actions before each goal using a creativity scale ranging from 0 to 10 (0 = not creative, 10 = highly creative) of all goals scored via open play (311 goals in 153 matches). Level of creativity was revealed using an Analysis of Variance and the frquency of high highly creative goals using a Kruskall- Wallis Test...
November 2018: Journal of Sports Sciences
Stijn Baert, Simon Amez
We test the soccer myth suggesting that a particularly good moment to score a goal is just before half time. To this end, rich data on 1,179 games played in the UEFA Champions League and UEFA Europa League are analysed. In contrast to the myth, we find that, conditional on the goal difference and other game characteristics at half time, the final goal difference at the advantage of the home team is 0.520 goals lower in case of a goal just before half time by this team. We show that this finding relates to this team's lower probability of scoring a goal during the second half...
2018: PloS One
John R Doyle, Paul A Bottomley
The paper analyses two datasets of elite soccer players (top 1000 professionals and UEFA Under-19 Youth League). In both, we find a Relative Age Effect (RAE) for frequency, but not for value. That is, while there are more players born at the start of the competition year, their transfer values are no higher, nor are they given more game time. We use Poisson regression to derive a transparent index of the discrimination present in RAE. Also, because Poisson is valid for small frequency counts, it supports analysis at the disaggregated levels of country and club...
2018: PloS One
Matthew J Slater, S Alexander Haslam, Niklas K Steffens
The present research examined the link between passion displayed by team members during the singing of national anthems at UEFA Euro 2016 and team performance in the tournaments' 51 games. Drawing on social identity theorising, we hypothesised a positive relationship between passion and performance. Consistent with this hypothesis, results showed that teams that sang national anthems with greater passion went on to concede fewer goals. Moreover, results provided evidence that the impact of passion on the likelihood of winning a game depended on the stage of the competition: in the knockout stage (but not the group stage) greater passion was associated with a greater likelihood of victory...
May 2018: European Journal of Sport Science
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