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Sarmento H, Martinho DV, Gouveia ÉR, Afonso J, Chmura P, Field A, Savedra NO, Oliveira R, Praça G, Silva R, Barrera-Díaz J, Clemente FM. The Influence of Playing Position on Physical, Physiological, and Technical Demands in Adult Male Soccer Matches: A Systematic Scoping Review with Evidence Gap Map. Sports Med 2024:10.1007/s40279-024-02088-z. [PMID: 39259431 DOI: 10.1007/s40279-024-02088-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2024] [Indexed: 09/13/2024]
Abstract
BACKGROUND There has been an increase in studies examining the demands of soccer relative to each playing position in recent years. Understanding the physical, physiological, and technical demands on soccer players according to their positional role during competitive matches is necessary to understand match requirements and develop position-specific training practices. Thereby, there is a clear need to synthesize the information on the different profiles of each playing position. OBJECTIVE This review aimed to organize the literature investigating physical, physiological, and technical demands according to playing positions and provide a framework to identify gaps and suggestions for future studies. METHODS A systematic search was conducted in October 2023 using four electronic databases: Web of Science, SPORTDiscus, PubMed and Scopus. The review followed PRISMA 2020 guidelines and the PRISMA-ScR extension for Scoping Reviews. The studies were included if the sample comprised adult male soccer players categorized from Tier 3 to Tier 5 (i.e., highly trained/national level, elite/international level, or world class) and compared the physical, physiological, or technical parameters across playing positions. RESULTS A total of 178 studies met the inclusion criteria and were included in the review. The number of teams, players, and matches analyzed per study varied considerably. Although a range of classifications were reported across studies, 59% of studies classified players as central defenders, full-backs, central midfielders, wide midfielders, and forwards. The findings suggests that central and external midfielders, and external defenders cover greater total and high-speed distance than forwards or central defenders. Sprint distance was higher in external midfielders versus all other positions. Defenders and central midfielders perform more passes than external midfielders and forwards. Heart rate was the most commonly reported physiological variable across playing positions. When expressed as a percentage of maximal heart rate, midfielders presented higher mean values than all other playing positions. CONCLUSION This scoping review demonstrates that there are differences in the demands on players across playing positions in soccer. Training practices in soccer should be based on the specific requirements of each positional role to ensure players can fulfill their tactical responsibilities during the game.
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Affiliation(s)
- Hugo Sarmento
- University of Coimbra, Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal.
| | - Diogo V Martinho
- University of Coimbra, Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
- LARSYS, Interactive Technologies Institute, Funchal, Portugal
| | - Élvio R Gouveia
- LARSYS, Interactive Technologies Institute, Funchal, Portugal
- Department of Physical Education and Sport, University of Madeira, Funchal, Portugal
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - José Afonso
- Faculty of Sport, Centre of Research, Education, Innovation, and Intervention in Sport (CIFI2D), University of Porto, Porto, Portugal
| | - Paweł Chmura
- Department of Team Games, Wroclaw University of Health and Sport Sciences, 51-612, Wrocław, Poland
| | - Adam Field
- Department of Sport and Exercise Science, Institute of Sport, Manchester Metropolitan University, Manchester, UK
| | - Nestor Ordoñez Savedra
- Research Group in Sports Science and Physical Activity, Faculty of Health Sciences, Sports Science Program, University of Applied and Environmental Sciences, Bogota, Colombia
| | - Rafael Oliveira
- Santarém Polytechnic University, School of Sport, Rio Maior, Portugal
- Research Center in Sport Sciences, Health Sciences and Human Development (CIDESD), Santarém Polytechnic University, Rio Maior, Portugal
| | - Gibson Praça
- Sports Department/UFMG Soccer Science Center/CECA, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rui Silva
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, Portugal
- Sport Physical Activity and Health Research & Innovation Center, 4900-347, Viana do Castelo, Portugal
| | - Joel Barrera-Díaz
- University of Coimbra, Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, Portugal
- Sport Physical Activity and Health Research & Innovation Center, 4900-347, Viana do Castelo, Portugal
- Gdansk University of Physical Education and Sport, 80-336, Gdańsk, Poland
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Connolly DR, Stolp S, Gualtieri A, Ferrari Bravo D, Sassi R, Rampinini E, Coutts AJ. How Do Young Soccer Players Train? A 5-Year Analysis of Weekly Training Load and its Variability Between Age Groups in an Elite Youth Academy. J Strength Cond Res 2024; 38:e423-e429. [PMID: 39072663 DOI: 10.1519/jsc.0000000000004813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
ABSTRACT Connolly, DR, Stolp, S, Gualtieri, A, Ferrari Bravo, D, Sassi, R, Rampinini, E, and Coutts, AJ. How do young soccer players train? A 5-year analysis of weekly training load and its variability between age groups in an elite youth academy. J Strength Cond Res 38(8): e423-e429, 2024-The aim of this study was to quantify the session rating of perceived exertion (sRPE), duration, and training load accrued across typical training weeks undertaken by youth soccer players. Differences between starters, nonstarters, and variations in training load variables were also investigated. Data were collected from 230 elite youth players in 4 age groups (U15, U16, U17, and U19) during 5 competitive seasons. Mixed models were used to describe variation between age groups and compare starters with nonstarters, with season as a fixed covariate effect. Week-to-week variation in training load was expressed as the percentage coefficient of variation. The main findings may be used to highlight a significant effect of age and playing status on training intensity, duration, and internal training load. Weekly training load increased progressively from the U15 to U17, with significant differences between each age group (p < 0.03). Lower mean weekly perceived intensity (sRPE) was noted in U15 when compared with the older age groups (4.2 vs. 4.6-4.9 arbitrary unit for U16 to U19, p < 0.001). Low weekly training load variation was observed across the different phases of the season in each age group, with the preseason exhibiting the greatest variance (3.6-6.2%). Differences in the training load are likely more attributable to changes in training duration rather than sRPE. Control of session duration seems to play an important role when aiming to control load in the academy environment, and practitioners should closely monitor the differences in duration and load being recorded between starters and nonstarters.
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Affiliation(s)
- Darragh R Connolly
- Sport Science and R&D Department, Juventus Football Club, Torino, Italy
- School of Sport, Exercise and Rehabilitation, Human Performance Research Centre, University of Technology Sydney, Sydney, Australia
| | - Sean Stolp
- School of Sport, Exercise and Rehabilitation, Human Performance Research Centre, University of Technology Sydney, Sydney, Australia
| | - Antonio Gualtieri
- Sport Science and R&D Department, Juventus Football Club, Torino, Italy
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
| | | | | | - Ermanno Rampinini
- Human Performance Laboratory, Mapei Sport Research Centre, Olgiate Olona, Italy; and
- Sport and Exercise Discipline Group, Human Performance Research Centre, University of Technology Sydney, New South Wales, Australia
| | - Aaron J Coutts
- School of Sport, Exercise and Rehabilitation, Human Performance Research Centre, University of Technology Sydney, Sydney, Australia
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Mandorino M, Tessitore A, Lacome M. Loading or Unloading? This Is the Question! A Multi-Season Study in Professional Football Players. Sports (Basel) 2024; 12:148. [PMID: 38921842 PMCID: PMC11209073 DOI: 10.3390/sports12060148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 06/27/2024] Open
Abstract
This study examined the impact of training load periodization on neuromuscular readiness in elite football players using the Locomotor Efficiency Index (LEI) as a measure of performance optimization. Throughout the 2021/22 and 2022/23 seasons, 106 elite male players (age: 19.5 ± 3.9 years) from an Italian professional football club were monitored using Global Positioning Systems (GPS) external load data. The LEI was derived from a machine learning model, specifically random forest regression, which compared predicted and actual PlayerLoad™ values to evaluate neuromuscular efficiency. Players were categorized by weekly LEI into three readiness states: bad, normal, and good. Analysis focused on the variation in weekly LEI relative to weekly load percentage variation (large decrease, moderate decrease, no variation, moderate increase, large increase), which included total distance, high-speed distance (above 25.2 km/h), and mechanical load, defined as the sum of accelerations and decelerations. Statistical analysis showed significant differences only with variations in total distance and mechanical load. Specifically, reducing weekly loads improved LEI in players in lower readiness states, while maintaining or slightly increasing loads promoted optimal readiness. This approach enables coaches to tailor training prescriptions more effectively, optimizing workload and recovery to sustain player performance throughout a demanding season.
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Affiliation(s)
- Mauro Mandorino
- Performance and Analytics Department, Parma Calcio 1913, 43121 Parma, Italy;
- Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, 00135 Rome, Italy;
| | - Antonio Tessitore
- Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, 00135 Rome, Italy;
| | - Mathieu Lacome
- Performance and Analytics Department, Parma Calcio 1913, 43121 Parma, Italy;
- Sport Expertise and Performance Laboratory, French National Institute of Sports (INSEP), 75012 Paris, France
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Soler A, Agulló F, Hernández-Davó J, Raya-González J, Del Coso J, González-Ródenas J, Moreno-Pérez V. Influence of the External Workload on Calf Muscle Strain Injuries in Professional Football Players: A Pilot Study. Sports Health 2024:19417381241247754. [PMID: 38708680 DOI: 10.1177/19417381241247754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024] Open
Abstract
BACKGROUND The influence of external workload variables on the development of calf muscle strainsin football players has not been previously explored. HYPOTHESIS Overloaded players would have an increased risk of calf muscle strain injury. STUDY DESIGN Prospective observational study. LEVEL OF EVIDENCE Level 4. METHODS A total of 41 professional football players from 1 team were monitored for 2 consecutive seasons. Total distance covered (TD), and distances covered at high-intensity running, high sprint running, low (LACC) and high (HACC) acceleration, low (LDEC) and high (HDEC) deceleration, and at high metabolic load distance (HMLD) were monitored with GPS units. Accumulated players' external workload in the week before injury was compared with the weekly mean value of the 6 weeks before injury occurred for each player. RESULTS Ten players (24.3%) suffered 16 calf muscle strain injuries (3.1 injuries per 1000 hours of match play; 0.5 injuries per 1000 hours of training exposure). Players with a calf muscle injury were older (p = 0.03), with higher body weight (p = 0.01) and height (p = 0.03). Injured players displayed substantially higher total training volume (p < 0.01), TD (p < 0.01), LACC (p < 0.01), LDEC (p < 0.01), HACC (p < 0.01), HDEC (p < 0.01), and HMLD (p = 0.03) in the week before injury, in comparison with the mean values of these variables in the 6 weeks before injury. CONCLUSION A week with a higher-than-habitual external workload might increase the risk of calf muscle strain injury in professional football players. Calf muscle injuries were preceded by a week with unusually high workloads associated with accelerating and decelerating distances and higher training volumes. CLINICAL RELEVANCE Monitoring external workload indicators may be helpful in determine players with a higher risk of calf muscle strain injury due to excessive workload during training/competition.
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Affiliation(s)
| | | | | | | | - Juan Del Coso
- Sport Sciences Research Centre, Rey Juan Carlos University, Spain
| | | | - Víctor Moreno-Pérez
- Sports Research Center, Miguel Hernandez University of Elche, Alicante, Spain
- Center for Translational Research in Physiotherapy, Department of Pathology and Surgery, Miguel Hernandez University of Elche, San Joan, Spain
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Harøy J, Bache-Mathiesen LK, Andersen TE. Lower HAGOS subscale scores associated with a longer duration of groin problems in football players in the subsequent season. BMJ Open Sport Exerc Med 2024; 10:e001812. [PMID: 38685919 PMCID: PMC11057268 DOI: 10.1136/bmjsem-2023-001812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2024] [Indexed: 05/02/2024] Open
Abstract
Introduction Groin injuries represent a considerable problem in football. Although the Adductor Strengthening Programme reduced groin injury risk, players can still experience groin symptoms throughout the season. This study aimed to determine whether preseason Copenhagen Hip and Groin Outcome Score (HAGOS) and a history of previous injury can identify individuals at risk of having a longer duration of groin problems the subsequent season, using an 'any physical complaint' definition of injury. Methods Preseason HAGOS score and weekly groin problems were registered with the Oslo Sports Trauma Research Center Overuse questionnaire during one full season in 632 male semiprofessional adult players. Results The prognostic model showed a decreased number of weeks with groin problems for each increase in HAGOS score for 'groin-related quality of life' (QOL) (IRR=0.99, p=0.003). A 10-point higher 'QOL' score predicted 10% fewer weeks of groin problems. Additionally, previous hip/groin injury was associated with a 74% increase in the number of weeks with symptoms (p<0.001). Conclusion The HAGOS questionnaire applied preseason can detect players at risk of getting more weeks with groin problems the following season. The 'QOL' subscale seems to be the superior subscale for estimating subsequent groin problem duration. While HAGOS appears promising in identifying players at risk, previous groin injury is the most robust indicator, showing a substantial 74% increase in weeks with symptoms.
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Affiliation(s)
- Joar Harøy
- Oslo Sports Trauma Research Center, Department of of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
- The Norwegian Football Association's Sports Medicine Center, Oslo, Norway
| | - Lena Kristin Bache-Mathiesen
- Oslo Sports Trauma Research Center, Department of of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Thor Einar Andersen
- Oslo Sports Trauma Research Center, Department of of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
- The Norwegian Football Association's Sports Medicine Center, Oslo, Norway
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Ferguson J, Gibson NV, Weston M, McCunn R. Reliability of Measures of Lower-Body Strength and Speed in Academy Male Adolescent Soccer Players. J Strength Cond Res 2024; 38:e96-e103. [PMID: 38416449 PMCID: PMC10880938 DOI: 10.1519/jsc.0000000000004639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
ABSTRACT Ferguson, J, Gibson, NV, Weston, M, and McCunn, R. Reliability of measures of lower body strength and speed in academy male adolescent soccer players. J Strength Cond Res 38(3): e96-e103, 2024-The Nordbord and ForceFrame represent a practical and time efficient means of assessing eccentric hamstring and isometric adductor strength in the large number of squads and players associated with youth soccer academies, yet measurement reliability in this population is unexamined. Therefore, over a period of 4 days, with no less than 24 hours and no more than 48 hours between trials, 37 players (age: 14.7 ± 0.8 years, stature: 168.7 ± 7.8 cm, mass: 57.7 ± 9.1 kg, and maturity offset: 0.8 ± 0.9 years) were assessed for eccentric hamstring strength (force, torque), isometric adductor strength (long and short lever positions), and 30-m sprint (5, 10, and 20-m splits), using the Nordbord, ForceFrame, and electronic timing gates, respectively, on 3 separate occasions. Relative reliability (intraclass correlation coefficient) was rated as good for all Nordbord (range: 0.86-0.89) and ForceFrame (0.78-0.85) measures and ranged from moderate (0.53) to excellent (0.93) for the speed measures, improving with increased distance. Absolute reliability (standard error of the measurement [%SEM]) ranged from 7 to 8% (Nordbord), 3 to 11% (ForceFrame), and 1 to 4% (sprints). Our data provide the first Nordbord and ForceFrame reliability estimates in adolescent soccer academy players. To interpret test sensitivity, practitioners are encouraged to interpret our estimates of absolute reliability against meaningful change values derived from personal experience and evidence-based knowledge and not against absolute or standardized thresholds.
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Affiliation(s)
- Jack Ferguson
- Heart of Midlothian Football Club, Oriam, Scotland's Sport Performance Centre, Edinburgh, United Kingdom
| | - Neil V. Gibson
- City Architect and Transformational Design, Blacktown City Council, Sydney, Australia; and
| | - Matthew Weston
- Institute for Sport, Physical Education and Health Science, Moray House School of Education and Sport, University of Edinburgh, Edinburgh, United Kingdom
| | - Robert McCunn
- Heart of Midlothian Football Club, Oriam, Scotland's Sport Performance Centre, Edinburgh, United Kingdom
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Neupert E, Holder T, Gupta L, Jobson SA. More than metrics: The role of socio-environmental factors in determining the success of athlete monitoring. J Sports Sci 2024; 42:323-332. [PMID: 38493350 DOI: 10.1080/02640414.2024.2330178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024]
Abstract
The perceived value of athlete monitoring systems (AMS) has recently been questioned. Poor perceptions of AMS are important, because where practitioners lack confidence in monitoring their ability to influence programming, and performance is likely diminished. To address this, researchers have primarily sought to improve factors related to monitoring metrics, e.g., validity rather than socio-environmental factors, e.g., buy-in. Seventy-five practitioners (response rate: n = 30) working with Olympic and Paralympic athletes were invited to take part in a survey about their perceptions of AMS value. Fifty-two per cent (n = 13) was confident in the sensitivity of their athlete self-report measures, but only 64% (n = 16), indicated their monitoring was underpinned by scientific evidence. A scientific base was associated with improved athlete feedback (rS (23) = 0.487, p =0.014*) and feedback correlated with athlete monitoring adherence (rS (22) = 0.675, p = <0.001**). If athletes did not complete their monitoring, 52% (n = 13) of respondents felt performance might be compromised. However, most respondents 56% (n = 14), had worked with internationally successful athlete(s) who did not complete their monitoring. While AMS can be a useful tool to aid performance optimisation, its potential value is not always realised. Addressing socio-environmental factors alongside metric-factors may improve AMS efficacy.
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Affiliation(s)
- Emma Neupert
- School of Sport, Health and Exercise Science, University of Portsmouth, Portsmouth, UK
- School of Sport, Health and Community, University of Winchester, Winchester, UK
| | - Tim Holder
- School of Sport, Health and Community, University of Winchester, Winchester, UK
| | - Luke Gupta
- UK Sports Institute, Bisham Abbey, Marlow, UK
| | - Simon A Jobson
- Faculty of Health and Wellbeing, University of Winchester, Winchester, UK
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Marynowicz J, Lango M, Horna D, Kikut K, Konefał M, Chmura P, Andrzejewski M. Within-Subject Principal Component Analysis of External Training Load and Intensity Measures in Youth Soccer Training. J Strength Cond Res 2023; 37:2411-2416. [PMID: 38015730 DOI: 10.1519/jsc.0000000000004545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
ABSTRACT Marynowicz, J, Lango, M, Horna, D, Kikut, K, Konefał, M, Chmura, P, and Andrzejewski, M. Within-participant principal component analysis of external training load and intensity measures in youth soccer training. J Strength Cond Res 37(12): 2411-2416, 2023-The aim of this study was to identify which combination of external training load (EL) and external intensity (EI) metrics during youth soccer training sessions captured similar or unique information. Data were collected from 18 youth soccer players during an 18-week in-season competition period using a 10-Hz global positioning system, rating of perceived exertion (RPE), and session-RPE (sRPE). External training load measures included total distance (TD, in meters), PlayerLoad (PL, in arbitrary units), high-speed running distance (HSR, in meters), and number of accelerations (ACC, n). All EL metrics were also divided by session duration (minutes) to obtain EI values. A total of 804 training observations were undertaken (43 ± 17 sessions per player). The analysis was performed by use of the principal component analysis technique. The first principal component (PC) captured 49-70% and 68-89% of the total variance in EI and EL, respectively. The findings show that from the 5 EI metrics, most of the information can be explained by either TD per minute or PL per minute, with a loading from 0.87 to 0.98 and from 0.76 to 0.95, respectively. The majority of EL information can be explained by PL (loading: 0.93-0.98), TD (loading: 0.95-0.99), ACC (loading: 0.71-0.91), or sRPE (loading: 0.70-0.93). The second PC for EL metrics is most strongly correlated with HSR, with loadings from 0.53 to 0.84. The results suggest that the majority of the information contained in the EL variables can be captured in 1 PC without losing much information. The findings suggest that stakeholders who intend to provide a fast and holistic view of EL information in a daily training environment should report TD, PL, ACC, or sRPE plus HSR to coaching staff as a metrics that provides additional unique information.
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Affiliation(s)
- Jakub Marynowicz
- Department of Theory and Methodology of Team Sport Games, Poznan University of Physical Education, Poznań, Poland
- KKS Lech Poznań S.A.-Football Club, Poznań, Poland
| | - Mateusz Lango
- Institute of Computer Science, Poznan University of Technology, Poznań, Poland
| | - Damian Horna
- Institute of Computer Science, Poznan University of Technology, Poznań, Poland
| | - Karol Kikut
- KKS Lech Poznań S.A.-Football Club, Poznań, Poland
| | - Marek Konefał
- Department of Biological and Motor Sport Bases, Wroclaw University of Health and Sport Sciences, Wrocław, Poland
| | - Paweł Chmura
- Department of Team Games, Wroclaw University of Health and Sport Sciences, Wrocław, Poland; and
| | - Marcin Andrzejewski
- Department of Methodology of Recreation, Poznan University of Physical Education, Poznań, Poland
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Sousa H, Musa RM, Clemente FM, Sarmento H, Gouveia ÉR. Physical predictors for retention and dismissal of professional soccer head coaches: an analysis of locomotor variables using logistic regression pipeline. Front Sports Act Living 2023; 5:1301845. [PMID: 38053523 PMCID: PMC10694450 DOI: 10.3389/fspor.2023.1301845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/07/2023] [Indexed: 12/07/2023] Open
Abstract
Introduction Soccer has enormous global popularity, increasing pressure on clubs to optimize performance. In failure, the tendency is to replace the Head coach (HC). This study aimed to check the physical effects of mid-season replacements of HCs, investigating which external load variables can predict retention or dismissal. Methods The data was collected in training and matches of a professional adult male soccer team during three complete seasons (2020/21-2022/2023). The sample included 6 different HCs (48.8 ± 7.4 years of age; 11.2 ± 3.9 years as a HC). The 4 weeks and 4 games before and after the replacement of HCs were analysed. External load variables were collected with Global Positioning System (GPS) devices. A logistic regression (LR) model was developed to classify the HCs' retention or dismissal. A sensitivity analysis was also conducted to determine the specific locomotive variables that could predict the likelihood of HC retention or dismissal. Results In competition, locomotor performance was better under the dismissed HCs, whereas the new HC had better values during training. The LR model demonstrated a good prediction accuracy of 80% with a recall and precision of 85% and 78%, respectively, amongst other model performance indicators. Meters per minute in games was the only significant variable that could serve as a potential physical marker to signal performance decline and predict the potential dismissal of an HC with an odd ratio of 32.4%. Discussion An in-depth analysis and further studies are needed to understand other factors' effects on HC replacement or retention.
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Affiliation(s)
- Honorato Sousa
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Rabiu Muazu Musa
- Centre for Fundamental and Continuing Education, Universiti Malaysia Terengganu, Kuala Nerus, Malaysia
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, Viana do Castelo, Portugal
- Gdansk University of Physical Education and Sport, Gdańsk, Poland
- Sport Physical Activity and Health Research & Innovation Center SPRINT, Melgaço, Portugal
| | - Hugo Sarmento
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Élvio R. Gouveia
- Department of Physical Education and Sport, University of Madeira, Funchal, Portugal
- LARSyS, Interactive Technologies Institute, Funchal, Portugal
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Arenas L, Frenger M, Skorski S, Meyer T. Survey of the current practices of German football academies towards biological maturation assessment. SCI MED FOOTBALL 2023:1-14. [PMID: 37840319 DOI: 10.1080/24733938.2023.2270563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES This study aimed to examine the importance assigned to assessing and considering biological maturation in thematic areas of player development and provide an overview of current practices in German football academies regarding its consideration in training and competition. METHODS An online survey was sent to 56 elite German football academies. A total of 46 responded to the questionnaire (82% response rate). Six participants provided incomplete information resulting in a total of 40 completed surveys in the period from March to May 2022. RESULTS Only 20 of participants regularly carried out maturation assessments, despite 95% recognizing its importance for load management, 90% for player development, and 85% for injury prevention. There was no consistent approach to modifying training and competition formats based on maturity status, with a primary focus on gym-based sessions for load management. CONCLUSION The survey results highlight limited implementation of maturation assessment and training modification based on maturity status in German elite youth football academies. Despite recognizing the importance of load monitoring, reporting to parents, and long-term player development in considering biological maturation, practices are not widespread. The predominant use of the maturity offset method suggests an opportunity to improve accuracy by exploring alternative measurement methods and increasing assessment frequency. Moreover, a lack of established procedures for incorporating maturity status into training and competition exists, hindering comprehensive consideration of biological maturation and injury risk prevention. Further research is needed to understand the reasons for inconsistent approaches in maturation assessment and load modification during training and competition.
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Affiliation(s)
- Lukas Arenas
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Monika Frenger
- Department Economics and Sociology of Sport, Saarland University, Saarbrücken, Germany
| | - Sabrina Skorski
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Tim Meyer
- Institute of Sport and Preventive Medicine, Saarland University, Saarbrücken, Germany
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Oliveira RFS, Canário-Lemos R, Peixoto R, Vilaça-Alves J, Morgans R, Brito JP. The relationship between wellness and training and match load in professional male soccer players. PLoS One 2023; 18:e0289374. [PMID: 37523395 PMCID: PMC10389715 DOI: 10.1371/journal.pone.0289374] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 07/18/2023] [Indexed: 08/02/2023] Open
Abstract
The aims of this study were to: (i) analyse the within-microcycle variations in professional soccer players; (ii) analyse the relationships between wellness and training and match load demands; (iii) analyse the relationships between match-day (MD) demands and wellness during the following day (MD+1); and (iv) analyse the relationships between MD and wellness during the day before match-play (MD-1). Thirteen professional soccer players (age: 24.85±3.13 years) were monitored daily over 16-weeks for wellness and training and match-play intensity. The daily wellness measures included fatigue, quality of sleep, muscle soreness, mood and stress using a 1-5 scale. Internal intensity was subjectively measured daily using the rating of perceived exertion (RPE) and the multiplication of RPE by session duration (s-RPE). While external intensity was quantified utilising high-speed running, sprinting, and acceleration and deceleration metrics. Data was analysed from each training session before (i.e., MD-5) or after the match (i.e., MD+1). Repeated measures ANOVA or Friedman ANOVA was used to analyse the aims (i) where Spearman correlation was applied to analyse the relationships between the aims (ii) and (iii) between sleep quality and training intensity. The main results for aim (i) showed that MD+1 presented the lowest values for wellness variables (p < 0.05). While MD-1 presented the lowest internal and external load values (for all variables), with MD presenting the highest values (p < 0.05). Regarding aim (ii), the main result showed significant large negative correlations between fatigue and s-RPE (r = -0.593; p = 0.033). Considering aim (iii), significant small to very large negative correlations were found for sleep quality, fatigue and muscle soreness with all internal and external variables (p < 0.05). Lastly, the main results for aim (iv) showed large negative correlations for fatigue and session duration; fatigue and s-RPE; muscle soreness and session duration; muscle soreness and s-RPE; and muscle soreness and decelerations (p < 0.05, for all). The main conclusions were that MD had an influence on wellness and internal and external training intensity, notably MD-1 and MD+1 were most affected. In this regard, a tendency of higher internal and external intensity on MD was associated with lower wellness measures of sleep quality, muscle soreness and fatigue on MD+1.
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Affiliation(s)
- Rafael Franco Soares Oliveira
- Sports Science School of Rio Maior-Polytechnic Institute of Santarém, Rio Maior, Portugal
- Life Quality Research Centre, Rio Maior, Portugal
- Health Sciences and Human Development (CIDESD), The Research Centre in Sports Sciences, Vila Real, Portugal
| | - Rui Canário-Lemos
- University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Research Group in Strength Training and Fitness Activities, GEETFAA, Vila Real, Portugal
| | - Rafael Peixoto
- University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Research Group in Strength Training and Fitness Activities, GEETFAA, Vila Real, Portugal
| | - José Vilaça-Alves
- Health Sciences and Human Development (CIDESD), The Research Centre in Sports Sciences, Vila Real, Portugal
- University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Research Group in Strength Training and Fitness Activities, GEETFAA, Vila Real, Portugal
| | - Ryland Morgans
- Football Performance Hub, University of Central Lancashire, Preston, United Kingdom
| | - João Paulo Brito
- Sports Science School of Rio Maior-Polytechnic Institute of Santarém, Rio Maior, Portugal
- Life Quality Research Centre, Rio Maior, Portugal
- Health Sciences and Human Development (CIDESD), The Research Centre in Sports Sciences, Vila Real, Portugal
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Gdovin JR, Galloway R, Tomasiello LS, Seabolt M, Booker R. External Training Load Monitoring and the Impact on Training Load Management in Collegiate Male Soccer Players. J Strength Cond Res 2023; 37:1434-1439. [PMID: 34149043 DOI: 10.1519/jsc.0000000000004080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Gdovin, JR, Galloway, R, Tomasiello, LS, Seabolt, M, and Booker, R. External training load monitoring and the impact on training load management in collegiate male soccer players. J Strength Cond Res 37(7): 1434-1439, 2023-Soccer is a physically demanding sport within the National Collegiate Athletic Association and continuously increases in popularity. To ensure athletes are adequately prepared for weekly physical stressors, coaches can use global positioning system technology to monitor external workloads and exercise intensity. These data can subsequently help coaches and practitioners better implement individualized training programs to ensure athletes are properly balancing the overreaching and overtraining paradigm. Therefore, the purpose of this observational study was to retrospectively analyze 3 consecutive seasons of external workload (total and high intensity distance) and injury data, which were derived from all training sessions and matches in 46 Division-I collegiate male soccer players. A coach's interpretation sought to provide practical insight into the functionality behind load management and how it prepares athletes for the physical stressors placed on them throughout a season. Two separate 3 × 3 repeated measures ANOVAs were conducted to determine differences between total distance and distance at high-intensity with an alpha level set at 0.05. Total distance between preseason and in-season ( p = 0.003), acute high-intensity distance ( p < 0.001), and chronic high-intensity distance ( p < 0.001) yielded significant differences. These results conclude the demands of each athlete change weekly and between seasons. It is recommended that sport coaches and practitioners develop individualized training programs by workload monitoring while considering variables such as a team's style of play, experience, position, role within a program, training intensity, and the length of time between conditioning sessions, practices, and matches.
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Affiliation(s)
- Jacob R Gdovin
- Department of Physical Education, Sport, and Human Performance, Winthrop University, Rock Hill, South Carolina
| | - Riley Galloway
- School of Kinesiology and Nutrition, The University of Southern Mississippi, Hattiesburg, Mississippi
| | | | - Michael Seabolt
- Athletic Department, Missouri State University, Springfield, Missouri; and
| | - Robert Booker
- Department of Kinesiology, Mississippi State University, Mississippi State, Mississippi
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Makar P, Silva AF, Oliveira R, Janusiak M, Parus P, Smoter M, Clemente FM. Assessing the agreement between a global navigation satellite system and an optical-tracking system for measuring total, high-speed running, and sprint distances in official soccer matches. Sci Prog 2023; 106:368504231187501. [PMID: 37424399 PMCID: PMC10358465 DOI: 10.1177/00368504231187501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
This study aimed to compare the agreement of total distance (TD), high-speed running (HSR) distance, and sprint distance during 16 official soccer matches between a global navigation satellite system (GNSS) and an optical-tracking system. A total of 24 male soccer players, who are actively participating in the Polish Ekstraklasa professional league, were included in the analysis conducted during official competitions. The players were systematically monitored using Catapult GNSS (10-Hz, S7) and Tracab optical-tracking system (25-Hz, ChyronHego). TD, HSR distance, sprint distance, HSR count (HSRC), and sprint count (SC) were collected. The data were extracted in 5-min epochs. A statistical approach was employed to visually examine the relationship between the systems based on the same measure. Additionally, R2 was utilized as a metric to quantify the proportion of variance accounted for by a variable. To assess agreement, Bland-Altman plots were visually inspected. The data from both systems were compared using the estimates derived from the intraclass correlation (ICC) test and Pearson product-moment correlation. Finally, a paired t-test was employed to compare the measurements obtained from both systems. The interaction between Catapult and Tracab systems revealed an R2 of 0.717 for TD, 0.512 for HSR distance, 0.647 for sprint distance, 0.349 for HSRC, and 0.261 for SC. The ICC values for absolute agreement between the systems were excellent for TD (ICC = 0.974) and good for HSR distance (ICC = 0.766), sprint distance (ICC = 0.822). The ICC values were not good for HSRCs (ICC = 0.659) and SCs (ICC = 0.640). t-test revealed significant differences between Catapult and Tracab for TD (p < 0.001; d = -0.084), HSR distance (p < 0.001; d = -0.481), sprint distance (p < 0.001; d = -0.513), HSRC (p < 0.001; d = -0.558), and SC (p < 0.001; d = -0.334). Although both systems present acceptable agreement in TD, they may not be perfectly interchangeable, which sports scientists and coaches must consider when using them.
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Affiliation(s)
- Piotr Makar
- Gdańsk University of Physical Education and Sport, Gdańsk, Poland
| | - Ana Filipa Silva
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal
- Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, Portugal
- The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, Portugal
| | - Rafael Oliveira
- The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, Portugal
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, Rio Maior, Portugal
- Life Quality Research Centre, Rio Maior, Portugal
| | - Marcin Janusiak
- Śląsk Wrocław Basketball, Physiology Department, Wrocław, Poland
| | - Przemysław Parus
- FC WKS Śląsk Wrocław, Physical Performance Department, Wrocław, Poland
| | - Małgorzata Smoter
- Department of Basics of Physiotherapy, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal
- Instituto de Telecomunicações, Delegação da Covilhã, Lisboa, Portugal
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Piñero JÁ, Chena M, Zapardiel JC, Roso-Moliner A, Mainer-Pardos E, Lampre M, Lozano D. Relative Individual Sprint in Most Demanding Passages of Play in Spanish Professional Soccer Matches. Sports (Basel) 2023; 11:sports11040072. [PMID: 37104146 PMCID: PMC10141546 DOI: 10.3390/sports11040072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/10/2023] [Accepted: 03/20/2023] [Indexed: 04/28/2023] Open
Abstract
(1) Background: The objective of this research was to analyse the most demanding passages (MDP) considering the sprint variable relative to the maximum level of sprint ability of each player as a function of player position, final outcome and part of the match during the competitive phase of a professional soccer season. (2) Methods: Global positioning system (GPS) data were collected from 22 players according to their playing position in the last 19 match days of the Spanish La Liga professional soccer in the 2020/2021 season. MDP were calculated from 80% of the maximum sprint speed of each player. (3) Results: Wide midfielders covered the greatest distance at >80% of the maximum speed (2.4 ± 1.63 seg) and the longest duration (21.91 ± 13.35 m) in their MDP. When the whole team was losing, it demonstrated greater distances (20.23 ± 13.04 m) and longer durations (2.24 ± 1.58 seg) compared to games in which it was winning. When the team ended up drawing, the relative sprint distance covered in the second half was significantly greater than in the first (16.12 ± 21.02; SD = 0.26 ± 0.28 (-0.03/-0.54). (4) Conclusions: Different demands of MDP, according to the sprint variable relative to the maximum individual capacity in competition, are required when contextual game factors are considered.
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Affiliation(s)
| | - Marcos Chena
- Facultad de Ciencias del Deporte de Toledo, Universidad de Castilla La Mancha, 13001 Ciudad Real, Spain
- Faculty of Medicine and Health Sciences, Campus Universitario-C/19, University of Alcalá, Av. de Madrid, Km 33,600, 28871 Madrid, Spain
| | - Juan Carlos Zapardiel
- Faculty of Medicine and Health Sciences, Campus Universitario-C/19, University of Alcalá, Av. de Madrid, Km 33,600, 28871 Madrid, Spain
| | - Alberto Roso-Moliner
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Elena Mainer-Pardos
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Miguel Lampre
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Demetrio Lozano
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
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A Qualitative Study of 11 World-Class Team-Sport Athletes' Experiences Answering Subjective Questionnaires: A Key Ingredient for 'Visible' Health and Performance Monitoring? Sports Med 2023; 53:1085-1100. [PMID: 36763237 PMCID: PMC10115681 DOI: 10.1007/s40279-023-01814-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Abstract
BACKGROUND Athlete monitoring trends appear to be favouring objective over subjective measures. One reason of potentially several is that subjective monitoring affords athletes to give dishonest responses. Indeed, athletes have never been systematically researched to understand why they are honest or not. OBJECTIVE Because we do not know what motivates professional athletes to be honest or not when responding to subjective monitoring, our objective is to explore the motives for why the athlete may or may not respond honestly. METHODS A qualitative and phenomenological approach was used, interviewing 11 world-class team-sport athletes (five women, six men) about their experiences when asked to respond to subjective monitoring questionnaires. Interview transcripts were read in full and significant quotations/statements extracted. Meanings were formulated for each interviewees' story and assigned codes. Codes were reflected upon and labelled as categories, with similar categories grouped into an overall theme. Themes were examined, articulated, re-interpreted, re-formulated, and written as a thematic story, drawing on elements reported from different athletes creating a blended story, allowing readers a feel for what it is like to live the experience. RESULTS Overall, four key themes emerged: (i) pursuit of the ideal-self, (ii) individual barriers to athlete engagement, (iii) social facilitators to athlete engagement; and (iv) feeling compassion from performance staff. CONCLUSIONS Our main insight is that athletes' emotions play a major role in whether they respond honestly or not, with these emotions being driven at least in part by the performance staff asking the questions.
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Construct Validity and Test-Retest Reliability of Hip Load Compared With Playerload During Football-Specific Running, Kicking, and Jumping Tasks. Int J Sports Physiol Perform 2023; 18:3-10. [PMID: 36455553 DOI: 10.1123/ijspp.2022-0194] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/26/2022] [Accepted: 08/10/2022] [Indexed: 12/05/2022]
Abstract
PURPOSE To determine the test-retest reliability of the recently developed Hip Load metric, evaluate its construct validity, and assess the differences with Playerload during football-specific short-distance shuttle runs. METHODS Eleven amateur football players participated in 2 identical experimental sessions. Each session included 3 different shuttle runs that were performed at 2 pace-controlled running intensities. The runs consisted of only running, running combined with kicks, and running combined with jumps. Cumulative Playerload and Hip Loads of the preferred and nonpreferred kicking leg were collected for each shuttle run. Test-retest reliability was determined using intraclass correlations, coefficients of variation, and Bland-Altman analyses. To compare the load metrics with each other, they were normalized to their respective values obtained during a 54-m run at 9 km/h. Sensitivity of each load metric to running intensity, kicks, and jumps was assessed using separate linear mixed models. RESULTS Intraclass correlations were high for the Hip Loads of the preferred kicking leg (.91) and the nonpreferred kicking leg (.96) and moderate for the Playerload (.87). The effects (95% CIs) of intensity and kicks on the normalized Hip Load of the kicking leg (intensity: 0.95 to 1.50, kicks: 0.36 to 1.59) and nonkicking leg (intensity: 0.96 to 1.53, kicks: 0.06 to 1.34) were larger than on the normalized Playerload (intensity: 0.12 to 0.25, kicks: 0.22 to 0.53). CONCLUSIONS The inclusion of Hip Load in training load quantification may help sport practitioners to better balance load and recovery.
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Aquino R, Guimarães R, Junior GOC, Clemente FM, García-Calvo T, Pulido JJ, Nobari H, Praça GM. Effects of match contextual factors on internal and external load in elite Brazilian professional soccer players through the season. Sci Rep 2022; 12:21287. [PMID: 36494482 PMCID: PMC9734126 DOI: 10.1038/s41598-022-25903-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
This study aimed to investigate the effects of contextual match factors (quality of opposition, match outcome, change of head coach or playing style) on internal and external load in elite Brazilian professional soccer players, considering the total and effective playing time. Twenty-two professional male outfield soccer players participated in this study (age 28.4 ± 4.9 years; height 1.78 ± 0.1 cm; body mass 72.9 ± 7.1 kg). The internal (rating of perceived exertion-based load [sRPE]) and external load (distance and accelerometry-based measures) were recorded during 38 matches, over the 2021 season of the Brazilian National 1st Division League using a global position system (10 Hz) integrated with an accelerometer (200 Hz). The main results were: (i) matches played against weak opponents presented greater values of sprinting distances compared to matches against intermediate and strong opponents; (ii) players covered greater high-intensity running distances when drawing than winning the matches; (iii) matches with assistant coaches presented higher mean speed relative to effective playing time (MSEPT) compared to coach 1 and coach 2 conditions. In addition, players covered greater MSEPT and high-acceleration in matches with coach 2 vs. coach 3; (iv) finally, small positive correlations were observed between positional attack sequences and MSTPT, total distance covered, and acceleration. Coaches and practitioners should consider these results when interpreting external load variables during elite Brazilian soccer matches.
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Affiliation(s)
- Rodrigo Aquino
- grid.412371.20000 0001 2167 4168LabSport, Post-Graduate Program in Physical Education, Centre of Physical Education and Sports, Federal University of Espírito Santo, Vitória, Brazil
| | - Rodrigo Guimarães
- Department of Physiology, América Football Club, Belo Horizonte, Brazil ,grid.8393.10000000119412521Programa de Doctorado en Ciencias del Deporte, Facultad de Ciencias del Deporte, Universidad de Extremadura, 10071 Cáceres, Spain
| | | | - Filipe Manuel Clemente
- grid.27883.360000 0000 8824 6371Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal ,Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), 4960-320 Melgaço, Portugal ,grid.421174.50000 0004 0393 4941Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal
| | - Tomas García-Calvo
- grid.8393.10000000119412521Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad, 10003 Cáceres, Spain
| | - Juan José Pulido
- grid.8393.10000000119412521Faculty of Education and Psychology, University of Extremadura, Avenida de Elvas, 06006 Badajoz, Spain
| | - Hadi Nobari
- grid.8393.10000000119412521Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad, 10003 Cáceres, Spain ,grid.413026.20000 0004 1762 5445Department of Exercise Physiology, Faculty of Educational Science and Psychology, University of Mohaghegh, Ardabil, 56199-11367 Iran ,grid.5120.60000 0001 2159 8361Department of Motor Performance, Faculty of Physical Education and Mountain Sports, Transilvania University of Braşov, 500068 Braşov, Romania
| | - Gibson Moreira Praça
- grid.8430.f0000 0001 2181 4888Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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18
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Akyildiz Z, Ocak Y, Clemente FM, Birgonul Y, Günay M, Nobari H. Monitoring the post-match neuromuscular fatigue of young Turkish football players. Sci Rep 2022; 12:13835. [PMID: 35974069 PMCID: PMC9381501 DOI: 10.1038/s41598-022-17831-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
Neuromuscular fatigue tests have been used in previous studies to organize post-match training programs and to minimize injuries. The aim of this study is to describe the neuromuscular fatigue that occurs after a football match and to examine the relationship between internal and external load values in the match and fatigue parameters obtained at different time intervals. Twenty male U19 academy league soccer players (age: 19; height: 181.3 ± 4.3; weight: 73.4 ± 6.7) participated in the study. The countermovement jump (CMJ) test was applied to the players 24 h before, as well as 24, 48, 72, 96, and 120 h after a football match. During the CMJ tests, the maximum velocity of each player during the jump was recorded by using the GymAware linear position transducer. The CMJ maximum velocity values 24 h before and 24 h after the match, as well as the CMJ height values (Cohen's d: 1.210; p < 0.001), were statistically different from the values recorded 24 h before and 24 and 48 h after the match (Cohen's d: 1.578; p < 0.001; Cohen's d: 0,922; p < 0.009). The correlation values were not statistically significant. The results suggest, CMJ height and CMJ maximum velocity values, which determine neuromuscular fatigue after a football match, can be used by practitioners to display post-match neuromuscular fatigue measurements.
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Affiliation(s)
- Zeki Akyildiz
- Faculty of Sport Sciences, Gazi University, Ankara, Turkey
| | - Yücel Ocak
- Faculty of Sport Sciences, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, 4900-347, Viana do Castelo, Portugal
- Delegação da Covilhã, Instituto de Telecomunicações, 1049-001, Lisboa, Portugal
| | - Yasar Birgonul
- Faculty of Sport Sciences, Gazi University, Ankara, Turkey
| | - Mehmet Günay
- Faculty of Sport Sciences, Gazi University, Ankara, Turkey
| | - Hadi Nobari
- Faculty of Sport Sciences, University of Extremadura, 10003, Cáceres, Spain.
- Department of Motor Performance, Faculty of Physical Education and Mountain Sports, Transilvania University of Braşov, 500068, Braşov, Romania.
- Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran.
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Ruf L, Drust B, Ehmann P, Skorski S, Meyer T. Are Measurement Instruments Responsive to Assess Acute Responses to Load in High-Level Youth Soccer Players? Front Sports Act Living 2022; 4:879858. [PMID: 35847450 PMCID: PMC9283776 DOI: 10.3389/fspor.2022.879858] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
PurposeThe aim of this study was to assess the short-term responsiveness of measurement instruments aiming at quantifying the acute psycho-physiological response to load in high-level adolescent soccer players.MethodsData were collected from 16 high-level male youth soccer players from the Under 15 age group. Players were assessed on two occasions during the week: after 2 days of load accumulation (“high load”) and after at least 48 h of rest. Measurements consisted of the Short Recovery and Stress Scale (SRSS), a countermovement jump (CMJ) and a sub-maximal run to assess exercise heart-rate (HRex) and heart-rate recovery (HRR60s). Training load was quantified using total distance and high-speed running distance to express external and sRPE training load to express internal load. It was expected that good instruments can distinguish reliably between high load and rest.ResultsOdd ratios (0.74–1.73) of rating one unit higher or lower were very low for athlete-reported ratings of stress and recovery of the SRSS. Standardized mean high load vs. rest differences for CMJ parameters were trivial to small (−0.31 to 0.34). The degree of evidence against the null hypothesis that changes are interchangeable ranged from p = 0.04 to p = 0.83. Moderate changes were observed for HRex (−0.62; 90% Cl −0.78 to −0.47; p = 3.24 × 10−9), while small changes were evident for HRR60s (0.45; 90% Cl 0.08–0.80; p = 0.04). Only small to moderate repeated-measures correlations were found between the accumulation of load and acute responses across all measurement instruments. The strongest relationships were observed between HRex and total distance (rm-r = −0.48; 90% Cl −0.76 to −0.25).ConclusionResults suggest that most of the investigated measurement instruments to assess acute psycho-physiological responses in adolescent soccer players have limited short-term responsiveness. This questions their potential usefulness to detect meaningful changes and manage subsequent training load and program adequate recovery.
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Affiliation(s)
- Ludwig Ruf
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany
- TSG ResearchLab gGmbH, Zuzenhausen, Germany
- TSG 1899 Hoffenheim, Zuzenhausen, Germany
- *Correspondence: Ludwig Ruf ; orcid.org/0000-0001-8589-8910
| | - Barry Drust
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Paul Ehmann
- TSG ResearchLab gGmbH, Zuzenhausen, Germany
- TSG 1899 Hoffenheim, Zuzenhausen, Germany
| | - Sabrina Skorski
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Tim Meyer
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany
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Houtmeyers KC, Brink MS, Helsen WF, Haelewijn N, Hagen M, Jaspers A, Vanrenterghem J. A lab-based comparison of differential ratings of perceived exertion between a run and jump protocol involving low or high impacts on the lower extremities. Eur J Sport Sci 2022; 23:746-754. [PMID: 35348436 DOI: 10.1080/17461391.2022.2060136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
ABSTRACTThe rating of perceived exertion method allows to describe training intensity in a single value. To better understand the underlying components, the separate rating of perceived breathlessness (RPE-B) and leg-muscle exertion (RPE-L) has been proposed. Here we hypothesized that the separation between the two components may (partly) be determined by the impacts on the lower extremities. In this study, we aimed to experimentally evaluate the differential effect of high versus low impact running and jumping on RPE-B and RPE-L in team sport activities by manipulating the movement strategy (heel strike and passive landing pattern versus forefoot strike and active landing pattern). Eighteen recreational team sport players participated in two submaximal tests consisting of a sequence of running and jumping bouts, whilst ground reaction forces (GRF) were collected. RPE-B and RPE-L data were collected after each bout using the CR100 scale. Paired-samples t-tests were used to analyse between-session differences in these variables. GRF analysis showed that absorption mechanics differed considerably between the two sessions. RPE-L was on average 6.50 AU higher in the low impact session (p = 0.006). However, RPE-B was also increased by 4.96 AU with low impact (p = 0.009). We conclude that the extent to which the lower extremities are being exposed to high or low impacts does not explain a possible separation between the two RPE types.
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Affiliation(s)
- Kobe C Houtmeyers
- Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium @MichelBrink, @WeHelsen, @HoutmeyersKobe
| | - Michel S Brink
- Center for Human Movement sciences, University of Groningen, University Medical Center, Groningen, Netherlands @Nhaelewijn, @jaspersarne
| | - Werner F Helsen
- Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium @MichelBrink, @WeHelsen, @HoutmeyersKobe
| | - Nicolas Haelewijn
- Department of Rehabilitation Sciences, KU Leuven, Brugge, Belgium, @ScienceJos
| | - Michiel Hagen
- Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium @MichelBrink, @WeHelsen, @HoutmeyersKobe
| | - Arne Jaspers
- Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium @MichelBrink, @WeHelsen, @HoutmeyersKobe
| | - Jos Vanrenterghem
- Faculty of Movement and Rehabilitation Sciences, KU Leuven, Leuven, Belgium @MichelBrink, @WeHelsen, @HoutmeyersKobe
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Weekly Variations of Well-Being and Interactions with Training and Match Intensities: A Descriptive Case Study in Youth Male Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052935. [PMID: 35270628 PMCID: PMC8910011 DOI: 10.3390/ijerph19052935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 02/05/2023]
Abstract
The aim of this study was two-fold: (i) analyze the weekly variations of well-being and training/match intensity measures in youth soccer players, and (ii) test relations between well-being and training intensity outcomes. The study followed a descriptive case study design. Twenty-seven under-17 male soccer players were monitored for well-being and training intensity parameters over seventeen consecutive weeks. An adjusted version of the Hooper questionnaire was used to monitor the perceptive sleep quality, readiness, fatigue, and delayed onset muscle soreness (DOMS) early in the morning. The CR-10 Borg’s scale was also used for monitoring the rate of perceived exertion (RPE) of players after training sessions. Repeated-measures analysis of variance was executed to test the between-week variations of both well-being and training intensity outcomes. Moreover, Pearson product moment correlation was used to test the relations between well-being and training intensity outcomes. Repeated measures ANOVA revealed significant differences between weeks in the sleep quality (F = 0.422; p < 0.001; ηp2 = 0.140), readiness (F = 0.8.734; p < 0.001; ηp2 = 0.251), fatigue (F = 4.484; p < 0.001; ηp2 = 0.147), DOMS (F = 3.775; p = 0.001; ηp2 = 0.127), RPE (F = 7.301; p < 0.001; ηp2 = 0.219), and session-RPE (F = 17.708; p < 0.001; ηp2 = 0.405). Correlations between well-being and training intensity outcomes in the same week revealed moderate correlations between fatigue and session-RPE (r = 0.325). As conclusions, it was found that well-being and training intensity fluctuates over the season, while well-being outcomes seems to be related with training intensity, although with a small magnitude.
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22
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Dalen-Lorentsen T. Training load and health problems in football: more complex than we first thought? (PhD Academy Award). Br J Sports Med 2022; 56:592-593. [PMID: 35193855 DOI: 10.1136/bjsports-2021-105403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2022] [Indexed: 11/04/2022]
Affiliation(s)
- Torstein Dalen-Lorentsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway .,Department of Smart Senors and Microsystems, SINTEF Digital, Oslo, Norway
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Ellis M, Penny R, Wright B, Noon M, Myers T, Akubat I. The dose-response relationship between training-load measures and aerobic fitness in elite academy soccer players. SCI MED FOOTBALL 2022; 5:128-136. [PMID: 35077333 DOI: 10.1080/24733938.2020.1817536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The aim of the current study is to examine the dose-response relationships between training load (TL) measures and the consequent changes in aerobic fitness. Data were collected over the 6-week pre-season period in elite youth soccer players. Participants completed a lactate threshold test to identify changes in treadmill speed at 2 mmol · l-1 (S2) and 4 mmol · l-1 (S4). Internal TL was quantified with the following training impulse (TRIMP) methods: Banister TRIMP, Edwards TRIMP, Lucia TRIMP, individual TRIMP (iTRIMP) and rate of perceived exertion was also collected. External TL measures were total distance, PlayerLoad, high speed running (14.4-19.8 km · h-1), very high-speed running (19.8-25.2 km · h-1) and maximal sprint distance (>25.2 km · h-1). Individual high-speed distance was derived from each participants treadmill speed at S4. Different Bayesian regression models were run with different likelihood functions. The best-fitting models with both the lowest out-of-sample prediction error and the highest variance explained (R2) were used. iTRIMP had the strongest relationships with changes in S2 (r = 0.93, R2 = 0.90) and S4 (r = 0.88, R2 = 0.82). Explained variance ranged from 10%-69% and 11%-38% for all other internal TL measures and external measures, respectively. In summary, the iTRIMP method demonstrates a dose-response relationship with changes in aerobic fitness in elite youth soccer players.
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Affiliation(s)
| | - Ryan Penny
- Coventry City Football Club, Coventry, UK
| | | | | | - Tony Myers
- Newman University, Sport and Health, Birmingham, UK
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24
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Clubb J, Towlson C, Barrett S. Measurement properties of external training load variables during standardised games in soccer: Implications for training and monitoring strategies. PLoS One 2022; 17:e0262274. [PMID: 35061784 PMCID: PMC8782283 DOI: 10.1371/journal.pone.0262274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 12/21/2021] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to assess the measurement properties of external training load measures across three formats of standardised training games. Eighty-eight players from two English professional soccer clubs participated in the study spanning three consecutive seasons. External training load data was collected from three types of standardised game format drills (11v11, 10v10, 7v7+6) using Global Positioning Systems. For each external training load metric in each game format, the following measurement properties were calculated; coefficient of variation (CV%) to determine between- and within-subject reliability, intraclass coefficient correlation (ICC) to determine test-retest reliability, and signal-to-noise ratio (SNR) to determine sensitivity. Total distance (TD) and PlayerLoad™ (PL) demonstrated good sensitivity (TD SNR = 1.6–4.6; PL SNR = 1.2–4.3) on a group level. However, a wide variety of within-subject reliability was demonstrated for these variables (TD CV% = 1.7–36.3%; PL CV% = 4.3–39.5%) and corresponding intensity measures calculated per minute. The percentage contribution of individual planes to PL showed the lowest between-subject CV% (CV% = 2–7%), although sensitivity varied across formats (SNR = 0.3–1.4). High speed running demonstrated poor reliability across all three formats of SSG (CV% = 51–103%, ICC = 0.03–0.53). Given the measurement properties of external training load measures observed in this study, specifically the within-subject variation, reliability across trials of standardised training games should be calculated on an individual level. This will allow practitioners to detect worthwhile changes across trials of standardised game format drills. Such information is important for the appropriate implementation of training and monitoring strategies in soccer.
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Affiliation(s)
- Jo Clubb
- School of Sport, Exercise and Rehabilitation, University of Technology Sydney, Sydney, Australia
| | - Chris Towlson
- Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom
- * E-mail:
| | - Steve Barrett
- Sport Science, Performance Analysis, Research and Coaching (SPARC), PlayerMaker, London, United Kingdom
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25
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Wearable Inertial Measurement Unit to Measure External Load: A Full-Season Study in Professional Soccer Players. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to describe weekly acute workload (wAW), chronic workload (wCW), acute: chronic workload ratio (wACWR), training monotony (wTM), and training strain (wTS) variations over a full season across playing positions. Twenty-one professional soccer players were daily monitored during 48 consecutive weeks. Total distance, sprint total distance (STD), high-speed running distance (HSRd), maximum speed, number of the repeated sprints, and body load (BL) were obtained during training and matches using a Wearable Inertial Measurement Unit. The wAW was determined for each external load measure. The wCW, wACWR, and wTM were calculated based on BL metric. Higher values of weekly STD were observed in lateral defenders/wingers (LDW) compared to central defenders/forwards (CDF) (p = 0.009; ES = Large) and midfielders (MDF) (p = 0.034; ES = Large). Additionally, weekly HSRd was higher in LDW vs. CDF (p = 0.016; ES = Large) and MDF (p = 0.011; ES = Large). The CDF presented a lower weekly number of repeated sprints than LDW (p = 0.021; ES = Large). In conclusion, weekly external load metrics were position-dependent over the season. Moreover, LDW a presented greater weekly STD, HSRd, and number of repeated sprints compared to other positions.
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26
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Training-Load Management in Rhythmic Gymnastics: Practices and Perceptions of Coaches, Medical Staff, and Gymnasts. Int J Sports Physiol Perform 2022; 17:530-540. [PMID: 35016155 DOI: 10.1123/ijspp.2021-0279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/31/2021] [Accepted: 08/13/2021] [Indexed: 11/18/2022]
Abstract
PURPOSE This study described and analyzed practices and perceptions of rhythmic gymnastics coaches, medical staff, and athletes on training-load management. METHODS Online surveys were distributed among professionals and gymnasts involved in rhythmic gymnastics training across the world. One hundred (50 coaches, 12 medical staff, and 38 gymnasts) participants from 25 different countries completed the surveys. RESULTS Respondents stated using coaches' perception on a daily basis as a method of monitoring external (57%) and internal (58%) load, recovery/fatigue (52%), and performance (64%). Variables and methods (eg, wearable devices, athlete self-reported measures, session rating of perceived exertion), and metrics (eg, acute and chronic load) commonly reported in the training-load literature and other sports were not frequently used in rhythmic gymnastics. The majority of coaches (60.3% [17%]) perceived that maladaptation rarely or never occurred. Medical staff involvement in sharing and discussing training-load information was limited, and they perceived that the measurement of athletes' recovery/fatigue was poor. Gymnasts noted good quality in relation to the measurement of performance. Most participants (≥85%) believed that a specific training-load management model for rhythmic gymnastics could be very or extremely effective. CONCLUSIONS In conclusion, rhythmic gymnastics coaches' perception is the most commonly used strategy to monitor load, recovery/fatigue, and performance; although, this could be a limited method to guarantee effective training-load management in this sport.
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Kyprianou E, Di Salvo V, Lolli L, Al Haddad H, Villanueva AM, Gregson W, Weston M. To Measure Peak Velocity in Soccer, Let the Players Sprint. J Strength Cond Res 2022; 36:273-276. [PMID: 31800476 DOI: 10.1519/jsc.0000000000003406] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Kyprianou, E, Di Salvo, V, Lolli, L, Al Haddad, H, Villanueva, AM, Gregson, W, and Weston, M. To measure peak velocity in soccer, let the players sprint. J Strength Cond Res 36(1): 273-276, 2022-Expressing externals loads relative to a player's individual capacities has potential to enhance understanding of dose-response. Peak velocity is an important metric for the individualization process and is usually measured during a sprint test. Recently, however, peak velocity was reported to be faster during soccer matches when compared with a 40-m sprint test. With the aim of developing the practice of individualized training prescription and match evaluation, we examined whether the aforementioned finding replicates in a group of elite youth soccer players across a broader range of soccer activities. To do this, we compared the peak velocities of 12 full-time male youth soccer players (age 16.3 ± 0.8 years) recorded during a 40-m sprint test with peak velocity recorded during their routine activities (matches, sprints, and skill-based conditioning drills: small-sided games [SSG], medium-sided games [MSG], large-sided games [LSG]). All activities were monitored with 10-Hz global positioning systems (Catapult Optimeye S5, version 7.32) with the highest speed attained during each activity retained as the instantaneous peak velocity. Interpretation of clear between-activity differences in peak velocity was based on nonoverlap of the 95% confidence intervals for the mean difference between activities with sprint testing. Peak velocity was clearly faster for the sprint test (8.76 ± 0.39 m·s-1) when compared with matches (7.94 ± 0.49 m·s-1), LSG (6.94 ± 0.65 m·s-1), MSG (6.40 ± 0.75 m·s-1), and SSG (5.25 ± 0.92 m·s-1), but not sprints (8.50 ± 0.36 m·s-1). Our data show the necessity for 40-m sprint testing to determine peak velocity.
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Affiliation(s)
- Efthymios Kyprianou
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
- Football Exchange, Research Institute of Sport Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Valter Di Salvo
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico," Rome, Italy ; and
| | - Lorenzo Lolli
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
- School of Health and Social Care, Teesside University, Middlesbrough, United Kingdom
| | - Hani Al Haddad
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
| | | | - Warren Gregson
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
- Football Exchange, Research Institute of Sport Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Matthew Weston
- Football Performance and Science Department, Aspire Academy, Doha, Qatar
- School of Health and Social Care, Teesside University, Middlesbrough, United Kingdom
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Castillo D, Raya-González J, Weston M, Yanci J. Distribution of External Load During Acquisition Training Sessions and Match Play of a Professional Soccer Team. J Strength Cond Res 2021; 35:3453-3458. [PMID: 31469765 DOI: 10.1519/jsc.0000000000003363] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
Abstract
ABSTRACT Castillo, D, Raya-González, J, Weston, M, and Yanci, J. Distribution of external load during acquisition training sessions and match play of a professional soccer team. J Strength Cond Res 35(12): 3453-3458, 2021-The aim of this study was to use global position systems to analyze the external loads of the 3 different acquisition training sessions (ATS) with competitive matches in professional soccer players over a 6-week period. Sixteen professional soccer players participated in the study, which analyzed the distribution of external load during the training microcycle of a professional soccer team. The 3 types of ATS undertaken by the players were as follows: ATS1 (strength), ATS2 (endurance), and ATS3 (speed). The total distance covered, the distance covered at above 14 km·h-1, the distance covered >21 km·h-1, the number of high accelerations (>3 m·s-2), and player load were recorded. The results showed that external loads were consistently higher during matches when compared with all training sessions (range of effect sizes: 1.06-3.38). Between training session comparisons revealed higher external loads during ATS1 and ATS2, when compared with ATS3 (range of effect sizes: 0.60-2.41). The only external load variable that differed between ATS1 and ATS2 was the distance covered >21 km·h-1, which was higher for ATS1. Our findings suggest that technical staff should consider the physical demands of weekly periodization to understand the training process regarding optimizing player physical performance.
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Affiliation(s)
- Daniel Castillo
- Faculty of Health Sciences, University Isabel I, Burgos, Spain
| | | | - Matthew Weston
- Department of Psychology, Sport & Exercise, School of Social Sciences, Humanities and Law, Teesside University, Middlesbrough, United Kingdom; and
| | - Javier Yanci
- Physical Education and Sport Department, Faculty of Education and Sport, University of Basque Country (UPV/EHU), Vitoria, Spain
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Oliveira R, Brito JP, Moreno-Villanueva A, Nalha M, Rico-González M, Clemente FM. Reference Values for External and Internal Training Intensity Monitoring in Young Male Soccer Players: A Systematic Review. Healthcare (Basel) 2021; 9:1567. [PMID: 34828613 PMCID: PMC8622615 DOI: 10.3390/healthcare9111567] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/07/2021] [Accepted: 11/11/2021] [Indexed: 11/18/2022] Open
Abstract
Training intensity monitoring is a daily practice in soccer which allows soccer academies to assess the efficacy of its developmental interventions and management strategies. The current systematic review's purpose is to: (1) identify and summarize studies that have examined external and internal training intensity monitoring, and to (2) provide references values for the main measures for young male soccer players. A systematic review of EBSCO, PubMed, Scielo, Scopus, SPORTDiscus, and Web of Science databases was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. From the 2404 studies initially identified, 8 were fully reviewed, and their outcome measures were extracted and analyzed. From them, the following range intervals were found for training: rated perceived exertion (RPE) 2.3-6.3 au; session-RPE, 156-394 au; total distance, 3964.5-6500 m and; distance >18 km/h, 11.8-250 m. Additionally, a general tendency to decrease the intensity in the day before the match was Found. This study allowed to provide reference values of professional young male players for the main internal and external measures. All together, they can be used by coaches, their staff, or practitioners in order to better adjust training intensity.
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Affiliation(s)
- Rafael Oliveira
- Sports Science School of Rio Maior, Polytechnic Institute of Santarém, 2140-413 Rio Maior, Portugal; (J.P.B.); (M.N.)
- Research Center in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
- Life Quality Research Centre, 2140-413 Rio Maior, Portugal
| | - João Paulo Brito
- Sports Science School of Rio Maior, Polytechnic Institute of Santarém, 2140-413 Rio Maior, Portugal; (J.P.B.); (M.N.)
- Research Center in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
- Life Quality Research Centre, 2140-413 Rio Maior, Portugal
| | - Adrián Moreno-Villanueva
- Department of Physical Activity and Sport Sciences, International Excellence Campus “Mare Nostrum”, Faculty of Sports Sciences, University of Murcia, 30720 San Javier, Spain;
| | - Matilde Nalha
- Sports Science School of Rio Maior, Polytechnic Institute of Santarém, 2140-413 Rio Maior, Portugal; (J.P.B.); (M.N.)
| | - Markel Rico-González
- Department of Didactics of Musical, Plastic and Corporal Expression, University of the Basque Country, UPV-EHU, 48940 Leioa, Spain;
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal;
- Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal
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30
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Football de haut-niveau : analyses physique et physiologique – blessures et prévention. Sci Sports 2021. [DOI: 10.1016/j.scispo.2021.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Luteberget LS, Houtmeyers KC, Vanrenterghem J, Jaspers A, Brink MS, Helsen WF. Load Monitoring Practice in Elite Women Association Football. Front Sports Act Living 2021; 3:715122. [PMID: 34514389 PMCID: PMC8430212 DOI: 10.3389/fspor.2021.715122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/09/2021] [Indexed: 11/14/2022] Open
Abstract
The description of current load monitoring practices may serve to highlight developmental needs for both the training ground, academia and related industries. While previous studies described these practices in elite men's football, no study has provided an overview of load monitoring practices in elite women's football. Given the clear organizational differences (i.e., professionalization and infrastructure) between men's and women's clubs, making inferences based on men's data is not appropriate. Therefore, this study aims to provide a first overview of the current load monitoring practices in elite women's football. Twenty-two elite European women's football clubs participated in a closed online survey (40% response rate). The survey consisted of 33 questions using multiple choice or Likert scales. The questions covered three topics; type of data collected and collection purpose, analysis methods, and staff member involvement. All 22 clubs collected data related to different load monitoring purposes, with 18 (82%), 21 (95%), and 22 (100%) clubs collecting external load, internal load, and training outcome data, respectively. Most respondents indicated that their club use training models and take into account multiple indicators to analyse and interpret the data. While sports-science staff members were most involved in the monitoring process, coaching, and sports-medicine staff members also contributed to the discussion of the data. Overall, the results of this study show that most elite women's clubs apply load monitoring practices extensively. Despite the organizational challenges compared to men's football, these observations indicate that women's clubs have a vested interest in load monitoring. We hope these findings encourage future developments within women's football.
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Affiliation(s)
- Live S. Luteberget
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
- Department of Public Health, Sport and Nutrition, University of Agder, Kristiandsand, Norway
| | - Kobe C. Houtmeyers
- Faculty of Movement and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Jos Vanrenterghem
- Faculty of Movement and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Arne Jaspers
- Faculty of Movement and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Michel S. Brink
- Center for Human Movement Sciences, University of Groningen, University Medical Center, Groningen, Netherlands
| | - Werner F. Helsen
- Faculty of Movement and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
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Wearables and Internet of Things (IoT) Technologies for Fitness Assessment: A Systematic Review. SENSORS 2021; 21:s21165418. [PMID: 34450860 PMCID: PMC8400146 DOI: 10.3390/s21165418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 12/28/2022]
Abstract
Wearable and Internet of Things (IoT) technologies in sports open a new era in athlete’s training, not only for performance monitoring and evaluation but also for fitness assessment. These technologies rely on sensor systems that collect, process and transmit relevant data, such as biomarkers and/or other performance indicators that are crucial to evaluate the evolution of the athlete’s condition, and therefore potentiate their performance. This work aims to identify and summarize recent studies that have used wearables and IoT technologies and discuss its applicability for fitness assessment. A systematic review of electronic databases (WOS, CCC, DIIDW, KJD, MEDLINE, RSCI, SCIELO, IEEEXplore, PubMed, SPORTDiscus, Cochrane and Web of Science) was undertaken according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. From the 280 studies initially identified, 20 were fully examined in terms of hardware and software and their applicability for fitness assessment. Results have shown that wearable and IoT technologies have been used in sports not only for fitness assessment but also for monitoring the athlete’s internal and external workloads, employing physiological status monitoring and activity recognition and tracking techniques. However, the maturity level of such technologies is still low, particularly with the need for the acquisition of more—and more effective—biomarkers regarding the athlete’s internal workload, which limits its wider adoption by the sports community.
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Dalen-Lorentsen T, Ranvik A, Bjørneboe J, Clarsen B, Andersen TE. Facilitators and barriers for implementation of a load management intervention in football. BMJ Open Sport Exerc Med 2021; 7:e001046. [PMID: 34249374 PMCID: PMC8220530 DOI: 10.1136/bmjsem-2021-001046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/07/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND In a recent randomised controlled trial, we found that a commonly used training load management approach was not effective in preventing injuries and illnesses in Norwegian elite youth footballers. AIM To investigate players' and coaches' barriers and facilitators to a load management approach to prevent injuries and illnesses and their attitudes and beliefs of load management and injuries and illnesses in general. METHODS We asked players and coaches about their views on injury risk in football, the benefits and limitations of load management in general and implementation of load management in football. The questionnaires used were based on similar studies using the Reach, Effectiveness, Adoption, Implementation and Maintenance framework. RESULTS We recorded answers from 250 players and 17 coaches. Most players (88%) reported that scientific evidence showing improved performance from the intervention measures is a key facilitator to completing the intervention. Similarly, coaches reported that the most important facilitator was scientific evidence that the preventive measures were effective (100%). Players reported that the coach's attitude to preventive measures was important (86%), and similarly, 88% of coaches reported that the player's attitude was important. CONCLUSIONS By having a mutual positive attitude towards the intervention, players and coaches can positively contribute to each other's motivation and compliance. Both players and coaches reported scientific evidence for load management having injury-preventive and performance-enhancing effect and being time efficient as important facilitators. TRIAL REGISTRATION NUMBER Trial registration number.
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Affiliation(s)
- Torstein Dalen-Lorentsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Andreas Ranvik
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - John Bjørneboe
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Benjamin Clarsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
- Centre for Disease Burden, Norwegian Institute of Public Health, Bergen, Norway
| | - Thor Einar Andersen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
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34
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Houtmeyers KC, Vanrenterghem J, Jaspers A, Ruf L, Brink MS, Helsen WF. Load Monitoring Practice in European Elite Football and the Impact of Club Culture and Financial Resources. Front Sports Act Living 2021; 3:679824. [PMID: 34095827 PMCID: PMC8173105 DOI: 10.3389/fspor.2021.679824] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 04/22/2021] [Indexed: 01/26/2023] Open
Abstract
Load monitoring is considered important to manage the physical training process in team sports such as Association Football. Previous studies have described the load monitoring practices of elite English football clubs and clubs with an established sports-science department. An examination of a broader international sample is currently not available. In addition, previous research has suggested factors that may improve the implementation of load monitoring practices, such as a strong club belief on the benefit of evidence-based practice (EBP) and high club financial resources. However, no study has examined yet the actual impact of these factors on the monitoring practices. Therefore, this study aims (1) to provide an overview of load monitoring practices in European elite football and (2) to provide insight into the differences in implementation between clubs by examining the impact of the club beliefs on the benefit of EBP and the club financial resources. An online survey, consisting of multiple choice and Likert scale questions, was distributed among sports-science and sports-medicine staff (n = 99, 50% response rate). Information was asked about the types of data collected, collection purposes, analysis methods, and staff involvement. The results indicated that external load data (e.g., global navigation satellite system, accelerometer…) was collected the most whilst respondents also indicated to collect internal load (e.g., heart rate, rating of perceived exertion…) and training outcome data (e.g., aerobic fitness, neuromuscular fatigue…) for multiple purposes. Considerable diversity in data analysis was observed suggesting that analysis is often limited to reporting the gathered data. Sports-science staff were responsible for data collection and analysis. Other staff were involved in data discussion to share decision-making. These practices were positively impacted by a stronger club belief on the benefit of EBP and greater financial resources. Creating an organizational culture, characterized by a strong belief on the benefit of EBP, is important to increase the impact of load monitoring. However, the actual potential may still be largely determined by financial resources. High-level clubs could therefore play a leading role in generating and sharing knowledge to improve training practices and player health.
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Affiliation(s)
- Kobe C Houtmeyers
- Faculty of Movement & Rehabilitation Sciences, Catholic University (KU) Leuven, Leuven, Belgium
| | - Jos Vanrenterghem
- Faculty of Movement & Rehabilitation Sciences, Catholic University (KU) Leuven, Leuven, Belgium
| | - Arne Jaspers
- Faculty of Movement & Rehabilitation Sciences, Catholic University (KU) Leuven, Leuven, Belgium
| | - Ludwig Ruf
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany
| | - Michel S Brink
- Center for Human Movement Sciences, University of Groningen, University Medical Center, Groningen, Netherlands
| | - Werner F Helsen
- Faculty of Movement & Rehabilitation Sciences, Catholic University (KU) Leuven, Leuven, Belgium
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Nobari H, Vahabidelshad R, Pérez-Gómez J, Ardigò LP. Variations of Training Workload in Micro- and Meso-Cycles Based on Position in Elite Young Soccer Players: A Competition Season Study. Front Physiol 2021; 12:668145. [PMID: 33995127 PMCID: PMC8117006 DOI: 10.3389/fphys.2021.668145] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 03/29/2021] [Indexed: 12/29/2022] Open
Abstract
The objectives of this study were to quantify the matches and training workload in micro-cycles of an elite young soccer team considering field position and to explain meso-cycles based on change of weekly acute (wAWL), chronic load (wCWL), acute-to-chronic workload ratio, training monotony (wTM), and training strain (wTS) between early-, mid-, and end-season periods considering playing position and whole team. Twenty-six under-16 elite young soccer players participated in this study, including six wide defenders and wide midfielders (WM), five central defenders (CD) and central midfielders, and four strikers (ST). Daily monitoring was performed by players for 20 weeks with the rating of perceived exertion using the Borg CR-10 scale. In comparison with early-season, results showed that there was a significant increase, in all playing positions, in wAWL and wCWL (except ST) and in wTM (except CD and ST) compared with end-season. On the other hand, there were significant reductions in wTS in CD, WM, and ST at the end-season. According to the results, coaches should consider the field position in different situations. Differences between training workload and matches can be a good guide for coaches, who have a special understanding of what causes the most load in training programs. Excessive training workload can potentially cause injury to adolescent athletes and controlling wTM can prevent this.
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Affiliation(s)
- Hadi Nobari
- Department of Physical Education and Sports, University of Granada, Granada, Spain.,HEME Research Group, Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain.,Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan, Iran.,Sports Scientist, Sepahan Football Club, Isfahan, Iran.,Faculty of Motor Sciences, Université libre de Bruxelles, Brussels, Belgium
| | - Reyhaneh Vahabidelshad
- Sports Scientist, Sepahan Football Club, Isfahan, Iran.,Faculty of Motor Sciences, Université libre de Bruxelles, Brussels, Belgium
| | - Jorge Pérez-Gómez
- HEME Research Group, Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - Luca Paolo Ardigò
- School of Exercise and Sport Science, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
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Nobari H, Barjaste A, Haghighi H, Clemente FM, Carlos-Vivas J, Perez-Gomez J. Quantification of training and match load in elite youth soccer players: a full-season study. J Sports Med Phys Fitness 2021; 62:448-456. [PMID: 33768776 DOI: 10.23736/s0022-4707.21.12236-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The present study aimed to quantify training and match load in elite young soccer players over the course of an entire season. METHODS Using a longitudinal design, session-rate of perceived exertion (s-RPE) and its metrics [weekly acute workload (wAW), acute to chronic workload ratio (wACWR), training monotony and training strain] were examined in twenty-one elite young soccer players (mean±standard deviation; age, 16.1±0.2 years; height, 176.8±5.6 cm; body mass, 67.3±5.7 kg; BMI, 21.5±1.4 kg/m2; VO2max, 47.6±3.8 ml.kg-1.min-1) during the whole season containing 4 meso-cycles: Pre-season (Pre-S), Earlyseason (Ear-S), Mid-season (Mid-S), and End-season (End-S). RESULTS Repeated-measures analysis of variance examined variations in s-RPE load data across the 4 meso-cycles and 1-week of micro-cycle. Analyzing data revealed the End-S had a significant greater wAW compared to Early-S (p = 0.002, g = 0.96) and Mid-S (p < 0.001, g = 1.09). However, no differences between in-season periods were observed in wACWR (p = 0.524). The within-week variations revealed significant lower wAW in pre-match a day (MD-1) (p < 0.001), 1 day after match (MD+1) (p < 0.001) and 2 days after match (MD+2) (p < 0.001) compared to match day (MD) for overall team analysis. Additionally, analyses by playing position showed that fullbacks have a significant lower AW in MD+2 compared to MD (p < 0.029). CONCLUSIONS The periodization of training load indicated variations across the whole season in young elite players. The weekly micro-cycle perceived load could be identified as follows; there are higher training loads on MD-3 and MD-2 which was similar to intensities experienced by players throughout the match play and, furthermore, lower overall WL on the MD+1 and MD+2 in order to ensure the optimal recovery of the players.
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Affiliation(s)
- Hadi Nobari
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan, Iran - .,Sports, Scientist, Sepahan Football Club, Isfahan, Iran - .,HEME Research Group, Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain -
| | - Amir Barjaste
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran
| | - Hamed Haghighi
- Department of Sport Injuries and Corrective Exercises, Faculty of Sport Sciences, University of Isfahan, Isfahan, Iran
| | - Filipe M Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, Viana do Castelo, Portugal
| | - Jorge Carlos-Vivas
- HEME Research Group, Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - Jorge Perez-Gomez
- HEME Research Group, Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
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Herold M, Kempe M, Bauer P, Meyer T. Attacking Key Performance Indicators in Soccer: Current Practice and Perceptions from the Elite to Youth Academy Level. JOURNAL OF SPORTS SCIENCE AND MEDICINE 2021; 20:158-169. [PMID: 33707999 DOI: 10.52082/jssm.2021.158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 01/04/2021] [Indexed: 11/24/2022]
Abstract
Key Performance Indicators (KPIs) are used to evaluate the offensive success of a soccer team (e.g. penalty box entries) or player (e.g. pass completion rate). However, knowledge transfer from research to applied practice is understudied. The current study queried practitioners (n = 145, mean ± SD age: 36 ± 9 years) from 42 countries across different roles and levels of competition (National Team Federation to Youth Academy levels) on various forms of data collection, including an explicit assessment of twelve attacking KPIs. 64.3% of practitioners use data tools and applications weekly (predominately) to gather KPIs during matches. 83% of practitioners use event data compared to only 52% of practitioners using positional data, with a preference for shooting related KPIs. Differences in the use and value of metrics derived from positional tracking data (including Ball Possession Metrics) were evident between job role and level of competition. These findings demonstrate that practitioners implement KPIs and gather tactical information in a variety of ways with a preference for simpler metrics related to shots. The low perceived value of newer KPIs afforded by positional data could be explained by low buy-in, a lack of education across practitioners, or insufficient translation of findings by experts towards practice.
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Affiliation(s)
- Mat Herold
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany.,Deutscher Fußball-Bund, Frankfurt am Main, Germany
| | - Matthias Kempe
- Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Pascal Bauer
- Deutscher Fußball-Bund, Frankfurt am Main, Germany.,Data Science and Sports Lab, University of Tübingen, Germany
| | - Tim Meyer
- Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany.,Deutscher Fußball-Bund, Frankfurt am Main, Germany
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38
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Drury B, Clarke H, Moran J, Fernandes JFT, Henry G, Behm DG. Eccentric Resistance Training in Youth: A Survey of Perceptions and Current Practices by Strength and Conditioning Coaches. J Funct Morphol Kinesiol 2021; 6:21. [PMID: 33670687 PMCID: PMC8006255 DOI: 10.3390/jfmk6010021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/08/2021] [Accepted: 02/15/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Eccentric resistance training (ERT) in youth is advocated for aiding performance and injury risk. However, research investigating the applied practices of ERT in youth is in its infancy. In this study, we surveyed the perceptions and practices of practitioners utilizing ERT in youth to provide an understanding of its current application in practice. METHODS Sixty-four strength and conditioning coaches completed an online survey reporting their current use of ERT in youth using both open and closed questions. RESULTS Coaches deemed the inclusion of ERT important in youth with its inclusion based upon factors such as maturation status, training age and strength levels. Coaches also displayed an awareness of the physiological responses to eccentric exercise in youth compared to adults. ERT was primarily used for injury prevention, with the majority of coaches using body-weight and tempo exercises. Furthermore, utilizing eccentric hamstrings exercises was reported as highly important. The frequency of ERT tended to increase in older age groups and coaches mainly prescribed self-selected rest intervals. Finally, the need for further research into the training guidelines of ERT in youth was highlighted, in which coaches require more information on how maturation influences training adaptations and the fatigue-recovery responses. CONCLUSION Coaches emphasized the importance of including ERT for both performance and injury prevention factors in youth although further research is required to generate practical guidelines for coaches in order to support its inclusion within practice.
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Affiliation(s)
- Benjamin Drury
- Department of Applied Sport Sciences, Hartpury University, Gloucestershire GL19 3BE, UK; (H.C.); (J.F.T.F.); (G.H.)
| | - Hannah Clarke
- Department of Applied Sport Sciences, Hartpury University, Gloucestershire GL19 3BE, UK; (H.C.); (J.F.T.F.); (G.H.)
| | - Jason Moran
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester CO4 3SQ, UK;
| | - John F. T. Fernandes
- Department of Applied Sport Sciences, Hartpury University, Gloucestershire GL19 3BE, UK; (H.C.); (J.F.T.F.); (G.H.)
| | - Greg Henry
- Department of Applied Sport Sciences, Hartpury University, Gloucestershire GL19 3BE, UK; (H.C.); (J.F.T.F.); (G.H.)
| | - David G. Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada;
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Monitoring Practices of Training Load and Biological Maturity in UK Soccer Academies. Int J Sports Physiol Perform 2021; 16:395-406. [PMID: 33401237 DOI: 10.1123/ijspp.2019-0624] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 03/03/2020] [Accepted: 04/21/2020] [Indexed: 11/18/2022]
Abstract
PURPOSE Overuse injury risk increases during periods of accelerated growth, which can subsequently impact development in academy soccer, suggesting a need to quantify training exposure. Nonprescriptive development scheme legislation could lead to inconsistent approaches to monitoring maturity and training load. Therefore, this study aimed to communicate current practices of UK soccer academies toward biological maturity and training load. METHODS Forty-nine respondents completed an online survey representing support staff from male Premier League academies (n = 38) and female Regional Talent Clubs (n = 11). The survey included 16 questions covering maturity and training-load monitoring. Questions were multiple-choice or unipolar scaled (agreement 0-100) with a magnitude-based decision approach used for interpretation. RESULTS Injury prevention was deemed highest importance for maturity (83.0 [5.3], mean [SD]) and training-load monitoring (80.0 [2.8]). There were large differences in methods adopted for maturity estimation and moderate differences for training-load monitoring between academies. Predictions of maturity were deemed comparatively low in importance for bio-banded (biological classification) training (61.0 [3.3]) and low for bio-banded competition (56.0 [1.8]) across academies. Few respondents reported maturity (42%) and training load (16%) to parent/guardians, and only 9% of medical staff were routinely provided this data. CONCLUSIONS Although consistencies between academies exist, disparities in monitoring approaches are likely reflective of environment-specific resource and logistical constraints. Designating consistent and qualified responsibility to staff will help promote fidelity, feedback, and transparency to advise stakeholders of maturity-load relationships. Practitioners should consider biological categorization to manage load prescription to promote maturity-appropriate dose-responses and to help reduce the risk of noncontact injury.
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40
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Understanding the Influence of the Head Coach on Soccer Training Drills—An 8 Season Analysis. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10228149] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Soccer players perform a variety of training drills to develop the physical, technical and tactical qualities required for match-play. The role of coaches in prescribing training suggests that players may not always meet physical targets set by conditioning staff. To quantify the physical outputs elicited by different training drill types, 183 professional soccer players were monitored over 8 seasons using Microelectromechanical Systems during normal training, yielding 65,825 drill observations [362 ± 341 observations·player−1]. Linear mixed models assessed the influence of drill type, head coach and playing position on physical output. Drills lasted ~14 min, eliciting total distances and high speed running of ~1000 m and 40 m, respectively. Conditioning drills elicited substantially greater relative high-speed running [18.8 ± 27.2 m.min−1] and Sprint [3.5 ± 9.4 m.min−1] distances than all other drill types. The proportion of training drill types used and external outputs elicited per drill were affected by the head coach. Midfielders recorded the highest total distance [77.3 ± 36.1 m.min] and PlayerLoad™ [8.29 ± 3.54] of any playing position, whilst the lowest outputs were recorded by goalkeepers. This study provides reference data for practitioners when seeking to manipulate training prescription to achieve physical output targets whilst also meeting the team’s technical and tactical objectives.
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Dalen-Lorentsen T, Bjørneboe J, Clarsen B, Vagle M, Fagerland MW, Andersen TE. Does load management using the acute:chronic workload ratio prevent health problems? A cluster randomised trial of 482 elite youth footballers of both sexes. Br J Sports Med 2020; 55:108-114. [PMID: 33036995 DOI: 10.1136/bjsports-2020-103003] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND The acute:chronic workload ratio (ACWR) is commonly used to manage training load in sports, particularly to reduce injury risk. However, despite its extensive application as a prevention intervention, the effectiveness of load management using ACWR has never been evaluated in an experimental study. AIM To evaluate the effectiveness of a load management intervention designed to reduce the prevalence of health problems among elite youth football players of both sexes. METHODS We cluster-randomised 34 elite youth football teams (16 females, 18 males) to an intervention group (18 teams) and a control group (16 teams). Intervention group coaches planned all training based on published ACWR load management principles using a commercially available athlete management system for a complete 10-month season. Control group coaches continued to plan training as normal. The prevalence of health problems was measured monthly in both groups using the Oslo Sports Trauma Research Centre Questionnaire on Health Problems. RESULTS The between-group difference in health problem prevalence (primary outcome) was 1.8%-points (-4.1 to 7.7 %-points; p=0.55) with no reduction in the likelihood of reporting a health problem in the intervention group (relative risk 1.01 (95% CI 0.91 to 1.12); p=0.84) compared with the control group. CONCLUSIONS We observed no between-group difference, suggesting that this specific load management intervention was not successful in preventing health problems in elite youth footballers. TRIAL REGISTRATION NUMBER ISRCTN18177140.
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Affiliation(s)
- Torstein Dalen-Lorentsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - John Bjørneboe
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Benjamin Clarsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway.,Department for Disease Burden, Norwegian Institute of Public Health, Bergen, Norway
| | - Markus Vagle
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway.,Department of Sports, Physical Education and Outdoor Studies, University of South-Eastern Norway, Horten, Norway
| | - Morten Wang Fagerland
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Thor Einar Andersen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway.,Department of Sports Medicine, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
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McCormack S, Jones B, Scantlebury S, Rotheram D, Till K. "It's Important, but It's Not Everything": Practitioners' Use, Analysis and Perceptions of Fitness Testing in Academy Rugby League. Sports (Basel) 2020; 8:sports8090130. [PMID: 32961849 PMCID: PMC7552628 DOI: 10.3390/sports8090130] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/16/2022] Open
Abstract
A plethora of research exists examining the physical qualities of rugby league players. However, no research has investigated practitioners’ insights into the use, analysis and perceptions of such fitness testing data that is vital for applying research into practice. Therefore, this study aimed to examine practitioners’ (coaches and strength & conditioning [S&C] coaches) perceptions and challenges of using fitness testing and the development of physical qualities. Twenty-four rugby league practitioners were purposefully sampled and completed a semi-structured interview. Interviews were transcribed and thematically analysed identifying five themes (it’s important, but it’s not everything; monitoring; evaluation and decision making; motivation; and other external challenges). The theme of “it’s important, but it’s not everything” emerged as a fundamental issue with regard fitness testing and the use of such data and that physical data alone does not inform coaches decisions. There appears conflicts between coaches and S&C coaches’ perceptions and use of fitness data, identifying complexities of supporting players in multidisciplinary teams. Collectively, the findings highlight the multifaceted nature of academy rugby league and suggest that practitioners should utilise fitness testing to inform player evaluations, positively influence training and assist with decision making. Moreover, practitioners should understand the combination of factors that influence fitness testing and work collaboratively to enhance talent development strategies.
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Affiliation(s)
- Sam McCormack
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds LS6 3QU, UK; (B.J.); (S.S.); (K.T.)
- England Performance Unit, Rugby Football League, Leeds LS17 8NB, UK;
- Correspondence:
| | - Ben Jones
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds LS6 3QU, UK; (B.J.); (S.S.); (K.T.)
- England Performance Unit, Rugby Football League, Leeds LS17 8NB, UK;
- Leeds Rhinos Rugby League Club, Leeds LS5 3BW, UK
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, The University of Cape Town and the Sports Science Institute of South Africa, Cape Town 7700, South Africa
| | - Sean Scantlebury
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds LS6 3QU, UK; (B.J.); (S.S.); (K.T.)
- England Performance Unit, Rugby Football League, Leeds LS17 8NB, UK;
| | - Dave Rotheram
- England Performance Unit, Rugby Football League, Leeds LS17 8NB, UK;
| | - Kevin Till
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds LS6 3QU, UK; (B.J.); (S.S.); (K.T.)
- Leeds Rhinos Rugby League Club, Leeds LS5 3BW, UK
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Impellizzeri FM, Menaspà P, Coutts AJ, Kalkhoven J, Menaspà MJ. Training Load and Its Role in Injury Prevention, Part I: Back to the Future. J Athl Train 2020; 55:885-892. [PMID: 32991701 PMCID: PMC7534945 DOI: 10.4085/1062-6050-500-19] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The purpose of this 2-part commentary series is† to explain why we believe our ability to control injury risk by manipulating training load (TL) in its current state is an illusion and why the foundations of this illusion are weak and unreliable. In part 1, we introduce the training process framework and contextualize the role of TL monitoring in the injury-prevention paradigm. In part 2, we describe the conceptual and methodologic pitfalls of previous authors who associated TL and injury in ways that limited their suitability for the derivation of practical recommendations. The first important step in the training process is developing the training program: the practitioner develops a strategy based on available evidence, professional knowledge, and experience. For decades, exercise strategies have been based on the fundamental training principles of overload and progression. Training-load monitoring allows the practitioner to determine whether athletes have completed training as planned and how they have coped with the physical stress. Training load and its associated metrics cannot provide a quantitative indication of whether particular load progressions will increase or decrease the injury risk, given the nature of previous studies (descriptive and at best predictive) and their methodologic weaknesses. The overreliance on TL has moved the attention away from the multifactorial nature of injury and the roles of other important contextual factors. We argue that no evidence supports the quantitative use of TL data to manipulate future training with the purpose of preventing injury. Therefore, determining "how much is too much" and how to properly manipulate and progress TL are currently subjective decisions based on generic training principles and our experience of adjusting training according to an individual athlete's response. Our message to practitioners is to stop seeking overly simplistic solutions to complex problems and instead embrace the risks and uncertainty inherent in the training process and injury prevention.
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Affiliation(s)
- Franco M. Impellizzeri
- Faculty of Health, Human Performance Research Centre and School of Sport, Exercise and Rehabilitation, University of Technology Sydney, New South Wales, Australia
| | | | - Aaron J. Coutts
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Judd Kalkhoven
- Faculty of Health, Human Performance Research Centre and School of Sport, Exercise and Rehabilitation, University of Technology Sydney, New South Wales, Australia
| | - Miranda J. Menaspà
- Australian Institute of Sport, Canberra, Australian Capital Territory, Australia
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Nosek P, Brownlee TE, Drust B, Andrew M. Feedback of GPS training data within professional English soccer: a comparison of decision making and perceptions between coaches, players and performance staff. SCI MED FOOTBALL 2020; 5:35-47. [DOI: 10.1080/24733938.2020.1770320] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Perry Nosek
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
- Belvoir Drive Training Ground, Leicester City Football Club, Leicester, UK
| | - Thomas E. Brownlee
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Barry Drust
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Matthew Andrew
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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45
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Fullagar HHK, McCall A, Impellizzeri FM, Favero T, Coutts AJ. The Translation of Sport Science Research to the Field: A Current Opinion and Overview on the Perceptions of Practitioners, Researchers and Coaches. Sports Med 2020; 49:1817-1824. [PMID: 31214978 DOI: 10.1007/s40279-019-01139-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Evidence-based practice (EBP) is the collated integration of practitioner expertise, athlete values and research evidence aimed to optimise the decision-making process surrounding sport performance. Despite the academic interest afforded to sport science research, our knowledge of how this research is applied in elite sport settings is limited. This current opinion examines the existing evidence of the translation of sport science research into the field, with a tailored focus on the current perceptions of practitioners, researchers and coaches. Recent studies show that practitioners and researchers report they ascertain sport science knowledge differently, with coaches preferring personal interactions compared with coaching courses or scientific journals. The limited peer-reviewed research shows that coaches perceive their knowledge is greater in fields such as tactical/technical areas, rather than physical fitness or general conditioning. This likely explains coaches' greater perceived value in research dedicated to technical and tactical expertise, as well as mental training and skill acquisition. Practitioners place a large emphasis on the need for research in physical fitness areas, which is likely due to their occupational focus. There are many perceived barriers of sport science research application, including funding, time, coach/player/staff 'buy in' and research questions that may not apply to the setting. We contend that researchers and practitioners may benefit in producing research, ascertaining knowledge and disseminating findings in alternative methods that better align with coaches' needs. In addition, educational strategies that focus on real-world context and promote social interaction between coaches, practitioners, organisational personnel and researchers would likely benefit all stakeholders.
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Affiliation(s)
- Hugh H K Fullagar
- Sport and Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Sydney, NSW, Australia.
| | | | - Franco M Impellizzeri
- Sport and Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Sydney, NSW, Australia
| | - Terry Favero
- Biology Department, University of Portland, Portland, OR, USA
| | - Aaron J Coutts
- Sport and Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Sydney, NSW, Australia
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46
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Lazarczuk SL, Love T, Cross MJ, Stokes KA, Williams S, Taylor AE, Fuller CW, Brooks JHM, Kemp SPT, Bezodis NE. The epidemiology of kicking injuries in professional Rugby Union: A 15-season prospective study. Scand J Med Sci Sports 2020; 30:1739-1747. [PMID: 32492220 DOI: 10.1111/sms.13737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 03/18/2020] [Accepted: 05/25/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE While kicking in Rugby Union can be influential to match outcome, the epidemiology of kicking injuries remains unknown. This study therefore aimed to investigate the epidemiology of injuries attributed to kicking in professional rugby, including playing position-specific effects and differences in kicking volumes and kick types. METHODS Fifteen seasons of injury surveillance data and two seasons of match kicking characteristics from professional rugby players were analyzed. Incidence, propensity, and severity of kicking-related injuries were calculated together with the locations and types of these injuries. Position-related differences in match kicking types and volumes were also established. RESULTS Seventy-seven match and 55 training acute-onset kicking injuries were identified. The match kicking injury incidence for backs was 1.4/1000 player-match-hours. Across all playing positions, the propensity for match kicking injury was 0.57 injuries/1000 kicks. Fly-halves sustained the greatest proportion of match kicking injuries (47%) and performed the greatest proportion of match kicks (46%); an average propensity for match kicking injury (0.58/1000 kicks). Scrum-halves executed 27% of match-related kicks but had a very low propensity for match kicking injury (0.17/1000 kicks). All other positional groups executed a small proportion of match-related kicks but a high propensity for match kicking injury. Ninety-two percent of match kicking injuries occurred in the pelvis or lower limb, with the majority sustained by the kicking limb. 21% of all match kicking injuries were associated with the rectus femoris muscle. CONCLUSION Match kicking profiles and kicking injuries sustained are position-dependent, which provides valuable insight for developing player-specific conditioning and rehabilitation protocols.
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Affiliation(s)
- Stephanie L Lazarczuk
- Faculty of Sport, Health and Applied Science, St Mary's University, Twickenham, UK.,Applied Sports, Technology, Exercise and Medicine Research Centre, Swansea University, Swansea, UK
| | - Thomas Love
- Applied Sports, Technology, Exercise and Medicine Research Centre, Swansea University, Swansea, UK
| | | | - Keith A Stokes
- Department for Health, University of Bath, Bath, UK.,Rugby Football Union, Twickenham, UK
| | | | | | | | - John H M Brooks
- Connect Health, Merton MSK Service, London, UK.,Ministry of Defence, RRU Halton, Wendover, UK
| | | | - Neil E Bezodis
- Applied Sports, Technology, Exercise and Medicine Research Centre, Swansea University, Swansea, UK
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47
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Principe VA, Vale RGDS, Nunes RDAM. A systematic review of load control in football using a Global Navigation Satellite System (GNSS). MOTRIZ: REVISTA DE EDUCACAO FISICA 2020. [DOI: 10.1590/s1980-65742020000400059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Vitor Ayres Principe
- Universidade do Estado do Rio de Janeiro, Brazil; Universidade do Estado do Rio de Janeiro, Brazil; Universidade Estácio de Sá, Brazil
| | - Rodrigo Gomes de Souza Vale
- Universidade do Estado do Rio de Janeiro, Brazil; Universidade do Estado do Rio de Janeiro, Brazil; Universidade Estácio de Sá, Brazil
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48
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Rago V, Brito J, Figueiredo P, Costa J, Barreira D, Krustrup P, Rebelo A. Methods to collect and interpret external training load using microtechnology incorporating GPS in professional football: a systematic review. Res Sports Med 2019; 28:437-458. [PMID: 31755307 DOI: 10.1080/15438627.2019.1686703] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The aim of this article was to systematically review the methods adopted to collect and interpret external training load (ETL) using microtechnology incorporating global positioning system (GPS). The main deficiencies identified concerned the non-collection of match ETL, and the non-consideration of potential confounders (e.g. playing position, fitness level, starting status or session content). Also, complementary training (individual/reconditioning) and pre-match warm-up were rarely quantified. To provide a full picture of the training demands, ETL was commonly complemented by internal training load monitoring with the rating of perceived exertion predominantly adopted instead of heart rate recordings. Continuous data collection and interpretation of ETL data in professional football vary widely between observational studies, possibly reflecting the actual procedures adopted in practical settings. Evidence about continuous ETL monitoring in female players, and female as well as male goalkeepers is lacking.
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Affiliation(s)
- Vincenzo Rago
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto , Porto, Portugal.,Portugal Football School, Portuguese Football Federation , Lisbon, Portugal
| | - João Brito
- Portugal Football School, Portuguese Football Federation , Lisbon, Portugal
| | - Pedro Figueiredo
- Portugal Football School, Portuguese Football Federation , Lisbon, Portugal.,Research Center in Sports Sciences, Health Sciences and Human Development, University Institute of Maia , Maia, Portugal
| | - Júlio Costa
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto , Porto, Portugal.,Portugal Football School, Portuguese Football Federation , Lisbon, Portugal
| | - Daniel Barreira
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto , Porto, Portugal
| | - Peter Krustrup
- Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, SDU Sport and Health Sciences Cluster, University of Southern Denmark , Odense, Denmark.,Shangai University of Sport , Shangai, China
| | - António Rebelo
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto , Porto, Portugal
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49
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Fullagar HH, Harper LD, Govus A, McCunn R, Eisenmann J, McCall A. Practitioner Perceptions of Evidence-Based Practice in Elite Sport in the United States of America. J Strength Cond Res 2019; 33:2897-2904. [DOI: 10.1519/jsc.0000000000003348] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Rago V, Brito J, Figueiredo P, Costa J, Krustrup P, Rebelo A. Internal training load monitoring in professional football: a systematic review of methods using rating of perceived exertion. J Sports Med Phys Fitness 2019; 60:160-171. [PMID: 31663318 DOI: 10.23736/s0022-4707.19.10000-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
INTRODUCTION The rate of perceived exertion (RPE) is widely adopted to quantify internal training load (ITL) in professional football. The aim of this study was to systematically review the use RPE-based methods in professional football. EVIDENCE ACQUISITION Observational studies conducted during training routines of professional football players over a minimum of one-week were selected based on the preferred reporting items for systematic reviews and meta-analyses statement. EVIDENCE SYNTHESIS Thirty-eight articles met the inclusion criteria (average qualitative score was 6.3 out of 10 [3 to 9]). The main deficiencies identified concerned the poor description of study design (~52% of the studies), and the non-quantification of match load (~44%). Ten studies complemented RPE-based ITL information with time-motion analysis (~26%) and seven studies added HR recordings (~18%). Nine studies collected RPE data after complementary training, separately to field sessions (~3%). Operational questions (e.g. How was your workout? ~71%) were preferred to instructions (e.g. Please rate the intensity of today's session; ~8%). Session-RPE (s-RPE; RPE multiplied by training duration) was more commonly adopted as measure of exercise intensity than isolated RPE (~76 vs. ~8%). RPE-derived variables calculated on weekly values included absolute week-to-week change, acute: chronic workload ratio, monotony and strain and were not frequently used (7 to 15%). Four studies (~11%) divided RPE in two components: respiratory and muscular. CONCLUSIONS There is a lack of consensus for the use of RPE in professional football and "good practices" are warranted. This review might help practitioners regarding procedures to adopt in RPE data collection and interpretation.
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Affiliation(s)
- Vincenzo Rago
- Center of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto, Porto, Portugal - .,Portugal Football School, Portuguese Football Federation, Lisbon, Portugal -
| | - João Brito
- Portugal Football School, Portuguese Football Federation, Lisbon, Portugal
| | - Pedro Figueiredo
- Portugal Football School, Portuguese Football Federation, Lisbon, Portugal.,Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University Institute of Maia, ISMAI, Maia, Portugal
| | - Júlio Costa
- Center of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto, Porto, Portugal.,Portugal Football School, Portuguese Football Federation, Lisbon, Portugal
| | - Peter Krustrup
- Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, Denmark.,Shangai University of Sport (SUS), Shangai, China
| | - António Rebelo
- Center of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto, Porto, Portugal
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