On-field Performance Research Articles

No transfer of 3D-Multiple Object Tracking training on game performance in soccer: a follow-up study

The impact of domain-general cognitive ‘brain’ training on improving sports performance is highly debated. This study sought to follow-up on research that showcased the benefits of perceptual-cognitive 3D-Multiple Object Tracking (3D-MOT) training in enhancing the on-field performance of soccer players. Additionally, it explored the correlation between athletes’ cognitive performance and early career success.Sixty-two males from a professional soccer academy were randomly divided into a dual-task 3D-MOT training group (n=30) and a control group (n=32). Participants underwent a 3D-MOT test, a cognitive test of attention, and small-sided games at pre- and post-training. Pre-post-test performances were compared using ANCOVAs. A Chi-squared test evaluated the association between the training regimen and early career success. A Spearman test assessed the correlation between performance on the 3D-MOT, attention test, and early career success.The dual-task 3D-MOT trained group significantly improved its performance on 3D-MOT compared to the control group (p < 0.001). However, no significant pre-post-test differences were observed between the groups in the near-transfer cognitive test and on-field performance (ps > 0.05). There were no associations between the athletes’ early career success and the training regimen, and no associations between cognitive test performances and early career success (ps > 0.05).This follow-up study failed to replicate previous findings with dual-task 3D-MOT training unable to produce near or far transfer on soccer performance. In addition, cognitive performance was not related to early career success in this study. The value of cognitive screening and training in sport is discussed.

In pursuit of precısion: assessing the impact of physical attributes on change of direction speed ın women's cricket

Cricket demands a unique blend of athleticism, strategy, and precision, with physical fitness crucial in achieving sports excellence. While previous research has highlighted the importance of physical attributes such as speed, explosive power, and agility, the complex interactions between these factors about change of direction speed (CODS) still need to be better understood. This study investigated the relationship between CODS and key physical measures among female cricket players, providing insights into the factors influencing athletic performance in cricket. Thirty female cricketers (aged 16-26 years) participated in the study, undergoing assessments of CODS, speed, vertical jump, and broad jump. Statistical analyses, including Pearson correlation coefficients, multiple regression analysis, and ANOVA, were employed to examine the relationships between these physical measures and CODS. Reliability was deemed to be poor (&lt;0.3), moderate (0.4&lt;0.6), and strong (0.7≤) based on prior research. Significant positive correlations were observed between agility and acceleration and maximal speed tests, underscoring the importance of speed in cricket performance. Furthermore, moderate to strong negative correlations were found between CODS and explosive lower body power tests, highlighting the significance of lower body explosiveness for rapid directional shifts in cricket. Regression analysis revealed that speed, broad jump, and vertical jump collectively contributed to a strong predictive model for agility. Enhancing speed, explosive power, and agility through targeted training interventions could improve cricket players' on-field performance and competitive edge. Overall, this study contributes to understanding the complex interactions between physical attributes and cricket performance, offering practical insights for player development and strategic improvement. Key Words: Change of Direction Speed; Physical Attributes; Explosive Power; Agility

Optimizing sports performance in China: Investigating the influence of training, recovery, motivation, and environmental support within a moderation-mediation framework

The expansion of sports in China is astounding. Given the country's focus on athletic achievement, it is crucial to comprehend the different facets of sports. This research examines China's athletic success in training, recuperation, motivation, and environment. The moderation-mediation strategy is used to understand how these variables affect athletic performance. This study fills a gap in understanding Chinese players' on-field performance. The study examined 355 Chinese athletes from various regions and sports. The sample has a balanced gender distribution, diverse age distribution, and representation from various regions. Furthermore, training programs, recovery strategies, motivation, psychological well-being, support systems, and experience levels influence athletes' sports performance. The study reveals that the coefficients indicate that training, recuperation tactics, motivation, and support systems affect athletic performance. Psychological health emerges as a critical mediator in explaining the effects of these factors on performance outcomes. Additionally, athlete experience moderates the influence of these variables, highlighting nuanced differences. These findings offer crucial insights for enhancing the performance of Chinese athletes. By adopting a moderation-mediation approach, this research illuminates the interconnected dynamics among key components, enriching our understanding of avenues for athlete improvement. Specifically, the results underscore the interconnectedness of athletes' psychological well-being, on-field experience, and competitive performance, emphasizing the importance of tailored interventions. This study could help Chinese politicians, sports psychologists, and coaches enhance athletes' performance.

Preseason and In-Season High-Speed Running Demands of 2 Professional Australian Rules Football Teams.

Australian Rules Football athletes complete long preseasons, yet injuries occur frequently at early stages of the competitive season. Little is known about the high-speed running (HSR) prescription during a preseason or whether players are adequately prepared for competition. This study described absolute and relative preseason and in-season HSR demands of 2 professional Australian football teams. HSR and sprinting volumes are significantly lower in elite Australian Rules football athletes during in-season compared with preseason. Cohort study. Level 3. During the 2019 season, HSR volume was collected for 2 professional Australian football teams (n = 55). Individual maximum speeds (Vmax) were captured to calculate relative running speed thresholds, as reported in 5% increments from 70%Vmax to 100%Vmax. Weekly volume of running above 70%Vmax (P = 0.01; r = 0.56) and 80%Vmax (P = 0.01; r = 0.58) was significantly greater in the preseason than the in-season. The weekly volume completed above 90%Vmax was not significantly greater in the preseason than the in-season (P = 0.10; r = 0.22). Individual variation in the distance completed at specific percentages of Vmax expressed as a coefficient of variation was reported as 51% at 71% to 80%Vmax, 39% at 81% to 90%Vmax, and 41% at 91% to 100%Vmax. The volume of HSR completed by athletes is far greater in the initial 4 weeks of the preseason than in any other point in preseason or competitive phases. At the individual level, there is substantial variation in the distance covered. This supports the concept of a heavily individualized approach to high-speed prescription and monitoring. Practitioners should carefully consider individual variation regarding sprinting volume during both preseason and in-season when prescribing and monitoring training to improve on-field performance and reduce the risk of injury.

Impact Of Medicine Ball Training On Physical Fitness, Body Composition, And Batting Performance In Female Cricketers

Background: The purpose of this research was to evaluate the impact of medicine ball training on body composition, physical fitness and batting performance of female cricketers in Bahawalpur City. Physical fitness and skill performance is crucial for cricketers, as it directly affects their gameplay. Medicine ball training, known for improving strength and power was utilized to explore its effects on the athletic performance of batswomen. Methodology: The study sample comprised 20 female cricketers (n=20) who were subjected to an 8-week medicine ball training program, conducted from Monday to Friday each week. Data collection tools included a stadiometer, weight machine, large and small sliding calipers, measuring tape, skinfold caliper, [1]dynamometer, sit and reach box, cricket ball, video camera and radar gun. Baseline data were recorded before the commencement of the training. Standardized tools and SPSS were used for data collection and analysis, with statistical significance set at p&lt;0.05. Results: The results indicated a significant positive effect of medicine ball training on the physical fitness of the participants. Notable improvements were observed in speed, power, flexibility, and agility. The training significantly enhanced the participants’ ability to perform cricket-specific batting techniques, demonstrating improved execution of shots like the half volley lofted shot, pull shot and cover drive. Conclusion: Medicine ball training effectively enhanced both physical fitness and batting performance in female cricketers. The training regimen’s focus on core strength and explosive movements translates directly into on-field performance. Coaches and trainers should consider incorporating such exercises into cricket training programs for female athletes to optimize performance.

Kinanthropometry and dietary habits of non-professional rugby players.

Evaluating the body composition and dietary habits of non-professional athletes can help identify areas for improvement to enhance sports performance. The present study aimed to describe the anthropometric and body composition features, as well as the dietary habits, of non-professional rugby players in Argentina. Fifty-seven rugby players from a Group III Club of the Unión de Rugby de Buenos Aires (URBA) were assessed using extensive anthropometric measurements according to the International Society for the Advancement of Kinanthropometry (ISAK) protocol. Reference data from professional rugby players in Group I clubs were used as a control for body composition comparisons. Dietary intake was evaluated using the 24-h recall method, and nutrient analysis was performed with SARA software. Non-professional rugby players were shorter (Forwards: 175.9 vs. 181.5 cm; Backs: 172.5 vs. 175.7 cm), had higher body fat percentages (Forwards: 16.4 vs. 12.3%; Backs: 11.0 vs. 9.3%), and were less muscular (Forwards: 46.0 vs. 48.8%; Backs: 48.4 vs. 50.2%) compared to professional rugby players. The average dietary intake was 3,363 Kcal, with protein and carbohydrate intakes of 1.4 g kg-1 day-1 and 4.1 g kg-1 day-1, respectively, and 35% of energy intake from fat. Backs reported a higher caloric intake than forwards (3,682 vs. 2,827 Kcal). There was a high prevalence of insufficient intake of calcium (58%), vitamin A (49%), and vitamin C (65%), the latter two corresponding with a low intake of fruits and vegetables (6% of total energy intake). Meal pattern analysis showed that 46% of total energy was ingested at dinner. The body composition of non-professional rugby players from low-income clubs could be improved to enhance rugby performance, as compared to players in more competitive tiers. Economic constraints might contribute to a sub-optimal nutritional profile, potentially affecting body composition and on-field performance negatively. Recommendations to improve dietary intake should be made considering the budget constraints of these players.

Integrating Electroencephalography with Motophysic training: Assessing the shift in fitness and cognitive functions in elite youth soccer players

Motor and physical fitness play a crucial role to optimize the player performance in the soccer game. Implementing a customized workout schedule targeting Motophysic Fitness (MPF) helps to elevate their on-field performance. The present study was aimed to assess the impact of a 12-week MPF Training program targeted to have improvements in physical fitness for elite soccer players. MPF training program was implemented during the off-season for youth soccer players with average age (20 ± 1 years), height (1.75 ± 0.5 m) weight (64.3 ± 5.7 kg). Soccer-related fitness traits were assessed to evaluate performance levels, while Electroencephalography (EEG) was utilized for cognitive assessment. Statistical analysis was performed to evaluate the outcome of the fitness traits. Significant improvements were observed across diverse fitness traits, with mean values increasing by a minimum of 2 % and a maximum of 5 %. Speed emerged as a predominant contributor, showing a robust correlation (Adjusted R2 = 0.84), while agility, strength, power, endurance, balance, coordination, and reaction time also displayed substantial improvements. Despite observable gains in flexibility, its impact on overall fitness appeared comparatively modest (Adjusted R2 = 0.23). Z-test confirmed the statistical significance of all fitness assessments post-MPF, with p-values less than 0.05 for each test. Features extracted from EEG highlighted the improvement in cognitive ability before and after training.

Marketisation, ownership and digitalisation strategies in the sport industry – generic insights and future research

PurposeThe motivation for this paper is to provide a deeper understanding of some of the important and trending topics in the sport industry. Besides this, to consider the changing landscape of ownership, strategies and organisation of several types of sports in the contemporary environment, there is a need for deeper contextual knowledge of how different sport/s, leagues, clubs, associations, teams etc. own, organise and strategise at local to national to regional to international contexts.Design/methodology/approachThis paper introduces the special issue on the sport industry that welcomes three interesting contributions of focusing on the important themes related to the sport industry. They include (1) digital transformation and needed capabilities, (2) fan engagement in a digital way using social media and finally (3) the relevance and relation of social capital in the organisational strategy of sports organisations.FindingsFour generic insights related to the themes and emerging trends in marketisation, ownership and digitalisation strategies in the sport industry are introduced in this paper. The first insight is that sports digitalisation and politicisation significantly impact the strategising, organising and networking activities of sports owners to foster value capture. Secondly, owners’ performance duality of marketisation of their sports clubs and vested business interests unravels the paradoxes of idealism and profit-maximisation. Thirdly, individual sports stars position themselves as an influential platform of value creation through on-field performance, social engagement and self-interests. Finally, the fourth insight is that the dual aims of sporting on-field success and profit making of large capital-funded sports clubs endanger the autonomy and governance of sports bodies/associations and an equitable sporting competition environment.Originality/valueThis paper provides an overview and reflections on the contributions of the papers in this special issue. The papers give different perspectives on how sport has been influenced by the development in society (1) with increasing digitalisation influencing organising of sport clubs and strategies for engaging fans, and (2) the influence of marketisation and politics in ownership strategies. As such, four insightful reflections are developed based on the originality of the contributions and the related extant literature presented on the themes of marketisation, ownership and digitalisation of the sport industry.

Strength, speed, and anthropometric predictors of in-game batting performance in baseball

ABSTRACT A key focus of sports science research is the identification of quantitative assessments that can predict players’ on-field performance and developmental potential. Despite efforts to establish predictive models, there are few validated measures that show reliable associations and large gaps in understanding. Here, we test a multidimensional battery of assessments developed through the USA Baseball, Prospect Development Pipeline that capture strength and functional movement abilities, and anthropometric characteristics, in a two-year cohort of collegiate baseball players from the Appalachian League. Swing propensity metrics for Zone Contact Percentage (ZCP: proportion pitches in strike zone swung at and hit) and Hard-Hit Percentage (HHP: proportion in-play balls with exit velocity ≥ 95 mph) were calculated on 189 players. Models testing hierarchical combinations of anthropometric and anthropometric plus assessment data were implemented using nested cross-validation with random forest and elastic net regression. Results indicate that anthropometric features account for 29% of variance in ZCP and 50–55% of HHP, while the addition of assessment contributed an additional 1–3% to ZCP and 5–12% to HHP, with top predictors coming from PDP strength and power assessments. These findings delineate contributions of andromorphic and physical abilities to in-game baseball performance using a validated assessment battery and advanced game statistics.

A valuation of football companies between tangible and intangible values: A preliminary study

This study delves into the dynamic world Football Club Valuations, an area rich in economic and cultural significance. It addresses the complex issue of which factors most profoundly influence the enterprise value of a football club. Central to the hypothesis is the notion that a club's infrastructural investments, player salaries, and on-field successes are determining factors in its financial value. To test this, and the other hypotheses of the study, the research employs a rigorous quantitative approach, utilizing multiple linear regression analysis, to investigate the factors influencing the enterprise value of European football clubs. Examining data from 28 prominent clubs between 2018 and 2023, our research focuses on infrastructural investments, player salaries, team value, and on-field performance. The results of this study are revealing, demonstrating a clear correlation between the hypothesized factors and club valuations, with infrastructural investments and player salaries emerging as key determinants of club valuation. The integration of a polynomial transformation for team value captures its complex, non-linear relationship with enterprise value. The model provides nuanced insights for football club stakeholders and managements. What distinguishes this work is its pioneering integration of financial acumen with a deep understanding of the unique cultural and economic landscape of football and reveals, how the dynamics of investment in infrastructure and player salaries, along with success in international competitions, significantly and complexly influence the corporate value in the football sector, offering a new framework for analyzing enterprise value in football.

Effect of Quality of Sleep on Choice Reaction Time, Coordination and Fatigue Level in Football Players

Introduction: The relationship between sleep quality and athletic performance is an important but little-researched topic in the immense world of football. This study aims to provide insight into how sleep quality affect football players’ choice reaction time, coordination, and fatigue levels, providing important information for training optimisation and improving on-field performance. Aim: To examine the effects of sleep quality on the athletic performance of young football players. Materials and Methods: A total of 40, (U-17)-developmental stage male football players who were able to perform functional keys for choice reaction time task from Chandigarh Football Association were recruited using non-probability convenience sampling. Correlational design was employed to assess sleep quality and fatigue levels using Sleep Quality Scale-(SQS) and Fatigue Assessment Scale-(FAS). Choice reaction time and coordination was determined via Deary liewald reaction time task software and Hand-eye coordination test respectively. Quantitative analysis was conducted by Karl Pearson’s coefficient correlation. Results: Study found a non significant weak positive relationship between sleep quality and choice reaction time, [r (40)=0.025, p=0.881], significant moderate positive relationship between sleep quality and coordination, [r (40)=0.433, p=0.005], and significant moderate negative relationship between sleep quality and fatigue level, [r (40)=-0.517, p=0.001]. Increased sleep quality improved coordination and reduced fatigue levels, while choice reaction time showed no significant improvements. Conclusion: Sleep quality significantly impacts coordination and fatigue levels, but no effect was observed on choice reaction time. Future research should explore various sports with a larger sample size.

Investigating the Effects of High Intensity Resistance Training on Physical Fitness of University Male Football Players

High intensity resistance training (HIRT) can enhance strength, power, speed, agility, endurance and reduce injury risk in football players contributing to improved performance on the field. The purpose of this study was to determine eight-week high intensity resistance training (HIRT) intervention affected the physical fitness of male university football players. A randomized controlled design was adopted for the study and (n=24) football players between the ages of 19 and 25 took part. Before and during the intervention, which included three weekly training sessions, the participants were evaluated. The Yo Yo intermittent recovery test level 1 (YYIRT1), the 30 m sprint time (ST), the running based anaerobic sprint test (RAST) and the change of direction time (COD) were among the physical fitness tests. Following the eight week HIRT intervention, all experimental group variables revealed significant changes between pre- and post-tests.

Academic Success of Collegiate Athletes and Social and Emotional Learning

College student-athletes represent a unique sub-population of college students with several competing responsibilities to fulfill. While institutions of higher education have historically used standardized test scores and GPA as predictors of students’ academic success, there have been shifts to include non-cognitive, social and emotional factors in this predictive model. Social and emotional skills can be developed. Research has shown that implementing social and emotional learning curriculum has positive impacts on academic achievement, student attitudes about learning, and the creation of prosocial behaviors. These benefits contribute to increased student persistence, retention, and graduation rates. While the connection between social and emotional learning and academic achievement is well documented, there is a lack of research and practical application of social and emotional learning curriculum in higher education with collegiate student-athletes. Advisors, academic support personnel, coaches, and athletic administrators who understand student-athletes’ social and emotional capabilities can use this understanding to help holistically develop student-athletes. Breaking down siloed, departmental operations within higher education and sharing information to work collaboratively for the good of student-athletes can lead to higher academic achievement, better on-field performance, and graduates with the necessary soft skills to succeed in a competitive job market.

A Study on Optimizing Error Detection and Correction Strategies in Physical Education and Sport Teaching using Data Mining Algorithms

In the fiercely competitive realm of sports and physical education, the application of data mining algorithms has emerged as a vital solution. Machine learning has streamlined processes, offering a seamless means of elevating the quality of education and training provided to students, particularly in the context of sports. This technological support empowers the sports education system to make more informed decisions pertaining to the physical development of aspiring athletes. In this comprehensive study, a blended approach of qualitative methods has been leveraged to gather intricate insights, enriching the overall understanding of the subject. Additionally, an in-depth exploration of articles and journals has been undertaken to scrutinize the practical implementation of data algorithm techniques geared towards enhancing physical training. The resultant findings underscore a substantial and tangible nexus between data algorithms and the domain of sports education. Of paramount significance is the central role played by data mining algorithms in augmenting performance. Notably, the National Sports Board (NSB) has extensively harnessed this technology to meticulously monitor players' on-field performance, ultimately leading to a granular comprehension of each player's capabilities. This paper emphasizes the methods of optimizing mistake detection and its joining systems for increasing the punishment in the operational procedures.

Dry Stacking of Filtered Iron Ore Tailings: Comparing On-Field Performance of Two Drying Methods

Dry Stacking of Filtered Iron Ore Tailings: Comparing On-Field Performance of Two Drying Methods

Determining the playing 11 based on opposition squad: An IPL illustration

Indian Premier League (IPL) is the most popular T20 domestic sporting league globally. Player selection is crucial in winning the competitive IPL tournament. Thus, team management select 11 players for each match from a team’s squad of 15 to 25 players. Different player statistics are analysed to select the best playing 11 for each match. This study attempts an approach where the on-field player performance is used to determine the playing-11. A player’s on-field performance in a match is computed as a single metric considering a player’s attributes against every player present in the opposition squad. For this computation, past ball-by-ball data is cleaned and mined to generate data containing player-vs-player performance attributes. Next, the various performance attributes for a player-vs-player combination is converted into a player’s performance rating by computing a weighted score of the performance attributes. Finally, an optimisation model is proposed and developed to determine the best playing-11 using the computed performance ratings. The developed optimisation model suggests the playing-11 that maximises the possibility of winning against a given opponent. The proposed procedure to determine the playing-11 for an IPL match is demonstrated using past data from 2008-20. The demonstration indicates that for matches in the league stage, the suggested playing-11 by model and the actual playing-11 have a ∼7% similarity across all teams. The remaining ∼3% are different from those selected in the actual team. Nevertheless, this difference approximately yields a ∼ Indian Premier League (IPL) is the most popular T20 domestic sporting league globally. Player selection is crucial in winning the competitive IPL tournament. Thus, team management select 11 players for each match from a team’s squad of 15 to 25 players. Different player statistics are analysed to select the best playing 11 for each match. This study attempts an approach where the on-field player performance is used to determine the playing-11. A player’s on-field performance in a match is computed as a single metric considering a player’s attributes against every player present in the opposition squad. For this computation, past ball-by-ball data is cleaned and mined to generate data containing player-vs-player performance attributes. Next, the various performance attributes for a player-vs-player combination is converted into a player’s performance rating by computing a weighted score of the performance attributes. Finally, an optimisation model is proposed and developed to determine the best playing-11 using the computed performance ratings. The developed optimisation model suggests the playing-11 that maximises the possibility of winning against a given opponent. The proposed procedure to determine the playing-11 for an IPL match is demonstrated using past data from 2008-20. The demonstration indicates that for matches in the league stage, the suggested playing-11 by model and the actual playing-11 have a ∼7% similarity across all teams. The remaining ∼3% are different from those selected in the actual team. Nevertheless, this difference approximately yields a ∼13.32% increase in performance rating compared to the existing team.3.32% increase in performance rating compared to the existing team.

Jump and sprint force velocity profile of young soccer players differ according to playing position

ABSTRACT Our study aimed to compare explosive performance and underlying mechanical determinants explored through F-V profiles in jumping and sprinting among young soccer players based on their playing position. Ninety elite soccer players were categorized into the following positions: goalkeepers, central defenders, wide defenders, central midfielders, wide midfielders, and forwards. Two testing sessions were conducted to measure the 30-metre sprint time (T30) using an over-ground sprint test and jump height (Hmax) through the SJ test. Results demonstrated performance variations among positions. In sprinting, forwards showed greater T30 (4.5 ± 0.14 s) compared to other positions, with goalkeepers exhibiting the lowest T30 (4.86 ± 0.18 s). Forwards also displayed higher maximal theoretical velocity (8.8 ± 0.4 m.s−1) and power output (Pmax) (19.4 ± 2.6 W.kg−1) than other positions, while goalkeepers had the lowest Pmax (16.5 ± 2 W.kg−1). In jumping, forwards (33.2 ± 3.9 cm) and wide-midfielders (33.6 ± 3.8 cm) achieved higher Hmax compared to goalkeepers (29.2 ± 5 cm) and central-midfielders (29.2 ± 3.8 cm). Wide-midfielders (28.5 ± 4.8 W.kg−1) and forwards (27.1 ± 4.3 W.kg−1) surpassed goalkeepers (23 ± 2.8 W.kg−1) and central-midfielders (25.1 ± 3.8 W.kg−1) in Pmax. Our findings reveal substantial position-related disparities in F-V profiles among elite young soccer players, in sprinting and jumping emphasizing the need for position-specific training programmes to optimize player development and on-field performance from an early age.

Selection of Key Performance Indicators for Your Sport and Program: Proposing a Complementary Process-Driven Approach

ABSTRACT Key performance indicators (KPIs) are commonplace in business and sport. They offer an objective means to link data and processes with performance outcomes. Yet, their application in sports performance, particularly team sports, is not without issue. Here, we review 4 key issues relating to KPI application in team sports; lack of a universal definition, complexity of performance, drifting from on-field performance goals with off-field targets, and agency issues across different key stakeholders. With these issues relating to sports performance KPIs in mind, we propose a complementary approach to help practitioners focus on implementing the conditions that create performance environments and opportunities for success in a complex sporting environment. Ongoing process trackers (OPTs) are quantifiable measures of the execution of behaviors and processes that create the environments, cultures, and conditions for successful performance outcomes. This approach equips sports science practitioners with key questions they can ask themselves and their team when starting to select and use OPTs in their program.

Putting the football back into football stardom: a case study of Gareth Bale as a national football ‘star’

ABSTRACT Work on footballing stardom has struggled with positioning on-field performance within the image of notable players. This is mainly born out of early scholarship that positioned the topic primarily within a celebrity studies framework, leading to a far greater concentration on footballers’ private lives away from the field of play. 1 This paper argues that the closely related, but meaningfully different, star studies framework (traditionally applied to analyse film stardom) provides a more appropriate model for interpreting footballing fame. Unlike celebrity studies, which does not separate the on-screen (or on-field) from the off-screen (or off-field) image, star studies positions the relationship between the two identities as more central to forming the overall star persona. This article develops this approach based upon a case study analysis of Welsh footballer Gareth Bale.

Valuing Australian football league draft picks.

To ensure uncertainty in match outcomes, professional sporting leagues have used various competitive balance policies, including player salary caps, revenue sharing among teams and player drafts. The Australian Football League (AFL) introduced a player draft in 1986, and to refine its operation, a draft value index (DVI) was introduced in 2015. The DVI allocates a numeric value to each individual player draft pick, with these values determined by the AFL using historic player compensation or wage and salary data. The AFL DVI plays an essential role in the operation of its player draft; however, other research has questioned the validity of such indexes. This paper aims to produce an alternative to the AFL DVI. The former index uses career compensation as the determinant of value, whereas we use other measures of player performance. First, various models were developed to predict on-field performance, such as games played (both in a recruit's career and season) after a draftee was selected for the first time by a team. This was then retrofitted to the pick used to select these draftees to create the new DVIs. Even though the predicted DVI followed an inverse monotonic function like the existing index, the decline in value for the DVI produced here was less steep, unlike the AFL's. This allowed us to conclude that players' salaries did not always strongly correlate to performance. The change in performance between players selected at different points in the draft did not vary as much as their wages. Though this scheme is applied to the AFL, the underlying concept could be directly exported to other player drafts.