scholarly journals Moving Toward a More Comprehensive Analysis of Acceleration Profiles in Elite Youth Football

2022 ◽  
Vol 3 ◽  
Author(s):  
Damian Kovacevic ◽  
George Elias ◽  
Susanne Ellens ◽  
Adam Cox ◽  
Fabio R. Serpiello
Keyword(s):  
Comprehensive Analysis ◽  
Football Players ◽  
Specific Information ◽  
Match Play ◽  
Acceleration Ability ◽  
Individual Level ◽  
Youth Football ◽  
High Acceleration ◽  
Level Monitoring

In football, having greater acceleration ability may decide the most important moments within matches. Up to now, commonly used acceleration variables have typically been investigated in isolation, with each variable suffering from unique limitations. Subsequently, any findings may provide a limited representation of what specific acceleration demands had actually occurred. Without gaining a comprehensive understanding of acceleration demands in football, it appears difficult to identify how to best monitor and maximize the long-term development of acceleration ability in footballers, all whilst doing so in a safe, sport-specific manner. Moving toward a more comprehensive analysis of acceleration profiles addresses this, as it can provide a more robust, informative understanding of the unique acceleration demands of competitive match-play. This perspective article aims to discuss the benefits of adopting a more comprehensive analysis of the acceleration demands during competitive matches for football players, by simultaneously analyzing high-intensity accelerations, repeated high acceleration ability (RHAA), and average acceleration. We discuss examples of the calculation and application of a more comprehensive acceleration profile at a team level throughout the course of an entire elite youth football season, as well as on an individual level. Monitoring acceleration profiles more comprehensively not only appears important from a training load/injury prevention perspective, but also, equips coaches and conditioning staff with the specific information necessary to develop and prescribe individualized, acceleration-emphasized training protocols that are replicable to the demands of match-play. Examples of such protocols are provided.

Constraints on visual exploration of youth football players during 11v11 match-play: The influence of playing role, pitch position and phase of play

2020 ◽  
Vol 38 (6) ◽  
pp. 658-668 ◽  
Author(s):  
Thomas B. McGuckian ◽  
Michael H. Cole ◽  
Daniel Chalkley ◽  
Geir Jordet ◽  
Gert-Jan Pepping
Keyword(s):  
Visual Exploration ◽  
Football Players ◽  
Match Play ◽  
Youth Football

The Occurrence of Repeated High Acceleration Ability (RHAA) in Elite Youth Football

2018 ◽  
Vol 39 (07) ◽  
pp. 502-507 ◽  
Author(s):  
Fabio Serpiello ◽  
Grant Duthie ◽  
Codey Moran ◽  
Damian Kovacevic ◽  
Erch Selimi ◽  
...  
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Small Difference ◽  
Soccer Players ◽  
Acceleration Ability ◽  
Youth Football ◽  
Maximal Acceleration ◽  
High Acceleration ◽  
Generalised Linear Mixed Model ◽  
Gps Devices

AbstractThe aim of the present study was to investigate the occurrence of Repeated High-Acceleration Ability (RHAA) bouts in elite youth football games using 10-Hz GPS devices and two relative thresholds derived from players’ actual maximal acceleration. Thirty-six outfield soccer players (age 14.9±0.6 years) participated in the study. Players wore 10-Hz GPS units during 41 official games. High accelerations were defined as efforts commencing above a threshold corresponding to 70% (T70%) or 80% (T80%) of the average 5-m acceleration obtained during a 40-m sprint test; RHAA bouts were defined as ≥3 efforts with ≤45 s recovery between efforts. Results were analysed via generalised linear mixed model and magnitude-based inferential statistics. On average, 8.0±4.6 and 5.1±3.5 bouts were detected in an entire game using T70% and T80%, respectively. When all positions were analysed together, there was a very-likely small difference in the number of RHAA bouts between first and second half for T70% and T80%, respectively. RHAA bouts occur frequently in elite youth football, with small differences between halves and between playing positions within the first or second half in most variables assessed.

scholarly journals Cycles of Training Sessions and Competitions of Youth Football Players

2021 ◽  
Vol 13 (2) ◽  
pp. 423-441
Author(s):  
Valerii Nikolaienko ◽  
Borys Maksymchuk ◽  
Ihor Donets ◽  
Pavlo Oksom ◽  
Nazarii Verbyn ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Training Programme ◽  
Football Players ◽  
System Modelling ◽  
Sources Of Information ◽  
Training Process ◽  
Theoretical Methods ◽  
Youth Football ◽  
Fierce Competition

At the present level of football development, the requirements for athletic skills are increasing. Given a fierce competition in the international and national sports arena as never before, it is important to mobilize functional reserves and maximize individual inclinations of players to demonstrate the highest capability for sport in the period optimal for it. It is precisely a long-term training programme focused on the demonstration of natural inclinations that is a strategic area in the training of qualified athletes under the current conditions. Adhering to qualitative characteristics of the training process should become the basis for evaluating the rational structure of a long-term training process. The paper aims to theoretically and methodically justify the periods of training sessions and competitions of youth football players. Research methods are the following: general theoretical methods (analysis, synthesis, abstraction, comparison, generalization and descriptive mathematical statistics), systemic theoretical methods (structural analysis, functional analysis, structural-and-functional analysis, historical method, system modelling), a study of the printed and electronic sources of information, description, interviewing, expert survey. An analysis of scientific and methodological literature, legal documents and training programmes adopted in the countries with a high level of football development has made it possible to construct models of annual programs based on the years of study with further regulation of cycles of training sessions and competitions. Rational construction of the system of footballers’ long-term training is based on the introduction of changes in the organization and holding of children’s and youth competitions, pedagogical principles of managing sports activities and technologies for training youth football players, as well as methods of evaluating children’s coaches’ professional performance.

Are specific players more likely to be involved in high-magnitude head impacts in youth football?

2019 ◽  
Vol 24 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Ryan A. Gellner ◽  
Eamon T. Campolettano ◽  
Eric P. Smith ◽  
Steven Rowson
Keyword(s):  
Data Driven ◽  
Small Subset ◽  
Football Players ◽  
Head Acceleration ◽  
Long Term Effects ◽  
Head Impacts ◽  
Youth Football ◽  
High Magnitude ◽  
The Relationship

OBJECTIVEYouth football attracts approximately 3.5 million participants every year, but concern has recently arisen about the long-term effects of experiencing repetitive head accelerations from a young age due to participation in football. The objective of this study was to quantify total involvement in high-magnitude impacts among individual players in youth football practices. The authors explored the relationship between the total number of high-magnitude accelerations in which players were involved (experienced either by themselves or by other players) during practices and the number of high-magnitude accelerations players experienced.METHODSA local cohort of 94 youth football players (mean age 11.9 ± 1.5, mean body mass 50.3 ± 16.4 kg) from 4 different teams were recruited and outfitted with helmet-mounted accelerometer arrays. The teams were followed for one season each for a total of 128 sessions (practices, games, and scrimmages). All players involved in high-magnitude (greater than 40g) head accelerations were subsequently identified through analysis of practice film.RESULTSPlayers who experienced more high-magnitude accelerations were more likely to be involved in impacts associated with high-magnitude accelerations in other players. A small subset of 6 players (6%) were collectively involved in 230 (53%) high-magnitude impacts during practice, were involved in but did not experience a high-magnitude acceleration 78 times (21% of the 370 one-sided high-magnitude impacts), and experienced 152 (30%) of the 502 high-magnitude accelerations measured. Quarterbacks/running backs/linebackers were involved in the greatest number of high-magnitude impacts in practice and experienced the greatest number of high-magnitude accelerations. Which team a player was on was an important factor, as one team showed much greater head impact exposure than all others.CONCLUSIONSThis study showed that targeting the most impact-prone players for individualized interventions could reduce high-magnitude acceleration exposure for entire teams. These data will help to further quantify elevated head acceleration exposure and enable data-driven interventions that modify exposure for individual players and entire teams.

scholarly journals Quantification of training and match-play load across a season in professional youth football players

2021 ◽  
pp. 174795412110003
Author(s):  
Patrick C Maughan ◽  
Niall G MacFarlane ◽  
Paul A Swinton
Keyword(s):  
Perceived Exertion ◽  
Linear Models ◽  
Training Load ◽  
Effect Sizes ◽  
Future Research ◽  
Football Players ◽  
Mixed Linear Models ◽  
Match Play ◽  
Mean Values ◽  
Youth Football

The purpose of this study was to quantify load across an entire season for professional youth football players and assess the effects of stage of season, playing position and training day relative to match day (MD). Data from ratings of perceived exertion and seven global positioning system (GPS) derived measures of external training load were collected from 20 players across a 47-week season. Mixed linear models were used to assess the effects of stage of season, training proximity to match day (e.g. MD-1, MD-2) and position across each dependent variable. Training proximity to match day was found to have the most substantive effect with effect sizes ranging from small ([Formula: see text] to large ([Formula: see text]. Across training load measures, mean values collected on match day were on average 47% higher than all other sessions. Whilst significant regression coefficients were obtained for playing position (p ≤ 0.003) and stage of season (p ≤ 0.049), effect sizes were close to zero ([Formula: see text]in each instance. This study provides insight into the season-long training and match-play demands of a professional youth football team. It highlights the significant impact of match-play on load and supports the use of multiple methods of collecting training load data. Overall, there was limited variation in mean values of dependent variables across playing position, stage of the season and loading during midweek training. These findings highlight the need for future research to investigate whether greater systematic variations in training load can be used to increase physical fitness and maximise physical performance during competition.

Creativity in Sociocultural Systems

2019 ◽  
pp. 269-284
Author(s):  
Dean Keith Simonton
Keyword(s):  
Macro Level ◽  
Historical Overview ◽  
Creative Activity ◽  
Cross Sectional ◽  
Individual Level ◽  
Short And Long Term ◽  
The Cross ◽  
Sociocultural Systems

Although psychologists typically see creativity as an individual-level event, sociologists and cultural anthropologists are more likely to view it as a sociocultural phenomenon. This phenomenon takes place at the level of relatively large and enduring collectives, such as cultures, nations, and even whole civilizations. This chapter reviews the extensive research on such macro-level creativity. The review begins with a historical overview before turning to the cross-sectional research on the creative Ortgeist, a subject that encompasses the factors that influence the relative creativity of both preliterate cultures and entire modern nations. From there the chapter turns to role of the Zeitgeist in affecting the creativity of civilizations across time—the rise and fall of creative activity. This research examines both quantitative and qualitative causes that operate both short- and long-term.

scholarly journals Performance Effects with Injury Prevention Exercise Programmes in Male Youth Football Players: A Randomised Trial Comparing Two Interventions

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Hanna Lindblom ◽  
Markus Waldén ◽  
Martin Hägglund
Keyword(s):  
Injury Prevention ◽  
Randomised Trial ◽  
Football Players ◽  
Male Athletes ◽  
Male Youth ◽  
Link Type ◽  
Youth Football ◽  
Performance Effects ◽  
Improved Performance ◽  
Exercise Programmes

Abstract Background Increased performance from injury prevention exercise programmes (IPEPs) may affect injury risks positively and support the implementation of IPEPs. The primary aim was to study the performance effects of injury prevention exercises from two different IPEPs, the Knee Control IPEP and the further developed Knee Control+ IPEP, in youth male football players, and the secondary aim was to compare potential differences in performance effects between the IPEPs. Methods Four male youth football teams were tested for agility, hop and sprint performance at the start of the second half of the competitive season and after the end of the 8-week season. Per randomisation, two teams used Knee Control and two teams Knee Control+. Results In total, 47 players executed a median of 13 IPEP sessions (range 11–21 sessions). No improvements in performance were seen in the group as a whole. The intervention groups showed small declines in sprint and agility performance. There was a significant between-group difference in change for the 505 agility test, with improved performance in the Knee Control and worse performance in the Knee Control+ group, ΔKC vs KC+ = − 0.012 (95% CI − 0.19 to −0.04), d = 0.98. Conclusions No clinically meaningful performance effects were seen from the Knee Control or Knee Control+ IPEP in youth male athletes and no meaningful differences were seen between Knee Control and Knee Control+ regarding effects on performance tests. Trial registration ClinicalTrials.gov identifier: NCT03251404. Registered on 16 August 2017.

scholarly journals Comprehensive analysis and insights gained from long-term experience of the Spanish DILI registry

2021 ◽  
Author(s):  
Camilla Stephens ◽  
Mercedes Robles-Diaz ◽  
Inmaculada Medina-Caliz ◽  
Miren Garcia-Cortes ◽  
Aida Ortega-Alonso ◽  
...  
Keyword(s):  
Comprehensive Analysis ◽  
Long Term Experience
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