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Schuth G, Szigeti G, Dobreff G, Pašić A, Gabbett T, Szilas A, Pavlik G. Football Movement Profile-Based Creatine-Kinase Prediction Performs Similarly to Global Positioning System-Derived Machine Learning Models in National-Team Soccer Players. Int J Sports Physiol Perform 2024; 19:874-881. [PMID: 38917990 DOI: 10.1123/ijspp.2024-0077] [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: 02/25/2024] [Revised: 04/30/2024] [Accepted: 05/04/2024] [Indexed: 06/27/2024]
Abstract
PURPOSE The relationship between external load and creatine-kinase (CK) response at the team/position or individual level using Global Positioning Systems (GPS) has been studied. This study aimed to compare GPS-derived and Football Movement Profile (FMP) -derived CK-prediction models for national-team soccer players. The second aim was to compare the performance of general and individualized CK prediction models. METHODS Four hundred forty-four national-team soccer players (under 15 [U15] to senior) were monitored during training sessions and matches using GPS. CK was measured every morning from whole blood. The players had 19.3 (18.1) individual GPS-CK pairs, resulting in a total of 8570 data points. Machine learning models were built using (1) GPS-derived or (2) FMP-based parameters or (3) the combination of the 2 to predict the following days' CK value. The performance of general and individual-specific prediction models was compared. The performance of the models was described by R2 and the root-mean-square error (RMSE, in units per liter for CK values). RESULTS The FMP model (R2 = .60, RMSE = 144.6 U/L) performed similarly to the GPS-based model (R2 = .62, RMSE = 141.2 U/L) and the combination of the 2 (R2 = .62, RMSE = 140.3 U/L). The prediction power of the general model was better on average (R2 = .57 vs R2 = .37) and for 73% of the players than the individualized model. CONCLUSIONS The results suggest that FMP-based CK-prediction models perform similarly to those based on GPS-derived metrics. General machine learning models' prediction power was higher than those of the individual-specific models. These findings can be used to monitor postmatch recovery strategies and to optimize weekly training periodization.
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Affiliation(s)
- Gabor Schuth
- Department of Sport Medicine and Sport Science, Hungarian Football Federation, Budapest, Hungary
- Department of Health Sciences and Sport Medicine, Hungarian University of Sports Science, Budapest, Hungary
| | - György Szigeti
- Department of Sport Medicine and Sport Science, Hungarian Football Federation, Budapest, Hungary
| | - Gergely Dobreff
- Department of Telecommunications and Media Informatics, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alija Pašić
- Department of Telecommunications and Media Informatics, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tim Gabbett
- Gabbett Performance Solutions, Brisbane, QLD, Australia
| | - Adam Szilas
- Department of Sport Medicine and Sport Science, Hungarian Football Federation, Budapest, Hungary
| | - Gabor Pavlik
- Department of Health Sciences and Sport Medicine, Hungarian University of Sports Science, Budapest, Hungary
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Perna P, de Keijzer KL, Beato M. Flywheel resistance training in football: a useful rehabilitation tool for practitioners. Front Sports Act Living 2024; 6:1434995. [PMID: 39036368 PMCID: PMC11257893 DOI: 10.3389/fspor.2024.1434995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Accepted: 06/12/2024] [Indexed: 07/23/2024] Open
Affiliation(s)
- Paolo Perna
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
- Medical Department, Chelsea Football Club, London, United Kingdom
| | - Kevin L. de Keijzer
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Marco Beato
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
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3
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Schuth G, Szigeti G, Dobreff G, Pasic A, Gabbett T, Szilas A, Pavlik G. Individual-Specific Relationship Between External Training and Match Load and Creatine-Kinase Response in Youth National Team Soccer Players. Sports Health 2023; 15:700-709. [PMID: 36314370 PMCID: PMC10467477 DOI: 10.1177/19417381221128822] [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: 08/31/2023] Open
Abstract
BACKGROUND Previous studies have examined the relationship between external load and creatine-kinase (CK) response at the team level. This study aimed to build individualized CK prediction models for elite youth national team soccer players. HYPOTHESIS The CK response of youth soccer players can be categorized as being sensitive to micromovements (MM), high-velocity (HV) parameters, or the combination of both, measured during training sessions and matches. STUDY DESIGN Prospective cohort study. LEVEL OF EVIDENCE Level 4. METHODS A total of 25 U16-U17 youth national team soccer players were monitored during training sessions and matches using global positioning system (GPS) units. Individual CK values were measured every morning from whole blood. The data set consisted of 57 ± 17 individual datapoints per player. Individual prediction models were used to examine the relationship between external load and consecutive CK changes. Numerous models were built for each player using MM, HV parameters, or the combination of both. The performance of the models was described by the R2 and the root mean square error (RMSE, U/l for CK values). RESULTS The MM models were superior for 8 players (R2 = 0.68; RMSE = 113 U/l), followed by HV (8 players; R2 = 0.69; RMSE = 88 U/l) and the combined models (2 players; R2 = 0.64; RMSE = 141 U/l). For the remaining 7 players, the R2 of the models was <0.5. The recovery time between efforts was more important in the HV model. CONCLUSION Players could be categorized on sensitivity to MM, HV movements, or the combination of both. CLINICAL RELEVANCE These findings can be used to individualize postmatch recovery strategies and to optimize weekly training periodization to maximize match performance.
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Affiliation(s)
- Gabor Schuth
- Hungarian Football Federation, Department of Sport Medicine and Sport Science, Budapest, Hungary
- University of Physical Education, Department of Health Sciences and Sport Medicine, Budapest, Hungary
| | - Gyorgy Szigeti
- Hungarian Football Federation, Department of Sport Medicine and Sport Science, Budapest, Hungary
| | - Gergely Dobreff
- Budapest University of Technology and Economics (BME), Department of Telecommunications and Media Informatics
| | - Alija Pasic
- Budapest University of Technology and Economics (BME), Department of Telecommunications and Media Informatics
| | - Tim Gabbett
- Gabbett Performance Solutions, Brisbane, Queensland, Australia
- Centre for Health Research, University of Southern Queensland, Ipswich, Queensland, Australia
- Institute of Health and Wellbeing, Federation University, Ballarat, VIC, Australia
| | - Adam Szilas
- Hungarian Football Federation, Department of Sport Medicine and Sport Science, Budapest, Hungary
| | - Gabor Pavlik
- University of Physical Education, Department of Health Sciences and Sport Medicine, Budapest, Hungary
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4
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Clayton DJ, Burbeary R, Hennis PJ, James RM, Saward C, Colledge A, Scott R, Gilpin S, McMahon R, Varley I. Turmeric supplementation improves markers of recovery in elite male footballers: a pilot study. Front Nutr 2023; 10:1175622. [PMID: 37293669 PMCID: PMC10244580 DOI: 10.3389/fnut.2023.1175622] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/02/2023] [Indexed: 06/10/2023] Open
Abstract
Football match-play causes muscle damage and provokes an inflammatory response. Rapid recovery is paramount to optimising subsequent performance and reducing injury risk. Turmeric contains high concentrations of curcumin, a polyphenol that has been shown to reduce muscle damage and soreness post-exercise in recreational exercisers. However, it is unknown whether a curcumin-containing supplement can support elite footballers recovery between matches. This applied study explored whether a turmeric supplement could improve performance, subjective and physiological markers of recovery, in elite male footballers. Twenty-four elite male footballers divided into a turmeric group, who consumed 60 mL of a turmeric drink twice per day, or a control group who did not. After 96 h of rest, baseline measurements of subjective soreness (leg and whole-body), plasma creatine kinase ([CK]), plasma C-reactive protein ([CRP]), isometric mid-thigh pull (IMTP) and counter movement jump (CMJ), were collected. Following eight competitive matches, subjective leg and whole-body soreness and plasma concentrations of inflammation markers ([CK] and [CRP]) were assessed immediately (0 h), 40 and 64 h post-match. Performance markers (IMTP and CMJ) were also assessed at 40 and 64 h post-match. Percentage change from baseline showed a main effect of group (p = 0.035, p = 0.005) and time (p = 0.002, p = 0.002) for both leg and whole-body soreness, respectively. There was a group by time interaction effect (p = 0.049) for [CRP]. There were no effects of turmeric on [CK], CMJ or IMTP. This applied study is the first in elite footballers to show that a curcumin-containing supplementation may attenuate a biomarker of inflammation [CRP] and soreness post-match play.
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Affiliation(s)
- David J. Clayton
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Ross Burbeary
- Derby County Football Club, Pride Park Stadium, Derby, United Kingdom
| | - Philip J. Hennis
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Ruth M. James
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Christopher Saward
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Amy Colledge
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Reece Scott
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Steve Gilpin
- Rotherham United Football Club, AESSEAL New York Stadium, Rotherham, United Kingdom
| | - Ryan McMahon
- Rotherham United Football Club, AESSEAL New York Stadium, Rotherham, United Kingdom
| | - Ian Varley
- Musculoskeletal Research Group, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
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Edinborough L, Hill J, Jarvis M, Bruce-Low S, Pedlar CR. A bespoke sleep monitoring and sleep hygiene intervention improves sleep in an U18 professional football player: A case study. J Sports Sci 2023:1-8. [PMID: 37183452 DOI: 10.1080/02640414.2023.2213032] [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: 05/16/2023]
Abstract
This case study reports on a professional football player (age: 17.6 years) who was referred for sleep monitoring and intervention after reporting excessive night-time awakenings. The player undertook a series of subjective sleep assessments and objective sleep monitoring (activity monitor). Based on the data presented, a sleep hygiene intervention was prescribed. Numerical comparisons were made between pre-intervention (Pre) and post-intervention (Post) values. Objective values were also compared to reference data from a similarly aged professional cohort from the same club (n = 11). Wake episodes per night (Pre: 7.9 ± 3, Post: 4.5 ± 1.9; -43%) and wake after sleep onset (WASO; Pre: 74.3 ± 31.8 mins, Post: 50.0 ± 22.8 mins, -33%) were improved from Pre to Post. Compared to the reference data, mean wake episodes per night (Pre: 7.9 ± 3.0, reference: 4.6 ± 2.6; -42%) and WASO (Pre: 74.3 ± 31.8 mins, reference: 44.3 ± 36.5 mins; -40%) were all lower compared to Pre levels. Whilst causality cannot be proven, we observed multiple sleep metrics improving following an intervention. This provides a potential framework for practitioners looking to provide targeted sleep assessment and intervention.
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Affiliation(s)
- Luke Edinborough
- Faculty of Sport, Allied Health and Performance Sciences, St Mary's University, Twickenham, UK
- Department of Sport Science, Southampton Football Club, Southampton, UK
| | - Jessica Hill
- Faculty of Sport, Allied Health and Performance Sciences, St Mary's University, Twickenham, UK
| | - Mark Jarvis
- Department of Sport Science, Southampton Football Club, Southampton, UK
| | - Stewart Bruce-Low
- School of Health Sport & Bioscience, University of East London, London, UK
| | - Charles R Pedlar
- Faculty of Sport, Allied Health and Performance Sciences, St Mary's University, Twickenham, UK
- Institute of Sport, Exercise and Health, Division of Surgery and Interventional Science, University College London (UCL), London, UK
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Martin-Garetxana I, Ciaurri J, Gil SM, Monasterio X, Ugarte A, Lekue JA, Larruskain J. What Are the Load and Wellness of Young Second-Team Football Players When Transitioning to the First Team? A Comparison of 2 Consecutive Preseasons. Int J Sports Physiol Perform 2023:1-8. [PMID: 37105543 DOI: 10.1123/ijspp.2022-0324] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 02/07/2023] [Accepted: 03/28/2023] [Indexed: 04/29/2023]
Abstract
PURPOSE To compare the load and wellness of second-team academy football players during a first-team preseason with those of first-team players and those of their previous second-team preseason. METHODS Athletic Club's first- (n = 10) and second-team (n = 9) players were prospectively followed during the 2019-20 first- and second-team and 2020-21 first-team preseasons. Weekly external and internal loads and average wellness z-scores (fatigue, sleep quality, muscle soreness, stress, and mood) were compared between preseasons and teams. RESULTS While training together during the 2020-21 preseason, second-team players performed more decelerations <-3 m/s2 per week than first-team players (moderate effect size). For first-team players, there were only small differences between preseasons in external load, but session rating of perceived exertion was higher (moderate) and stress (moderate) and mood (large) z-scores were worse in 2020-21. For second-team players, more total distance (large), accelerations >3 m/s2 (large), and decelerations <-3 m/s2 (very large) were performed; total loading (moderate) and session rating of perceived exertion (moderate) were higher; and fatigue (very large) and stress (moderate) z-scores were worse during the 2020-21 first-team preseason compared to their previous second-team preseason. CONCLUSIONS Players transitioning from the second team faced higher external and internal loads, fatigue, and stress during the first-team preseason compared to the previous second-team preseason. Player development and monitoring plans appear necessary to manage the transition from the academy to the first team.
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Affiliation(s)
- Imanol Martin-Garetxana
- Medical Services, Athletic Club, Lezama,Spain
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,Spain
| | - Jon Ciaurri
- Medical Services, Athletic Club, Lezama,Spain
| | - Susana M Gil
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,Spain
| | - Xabier Monasterio
- Medical Services, Athletic Club, Lezama,Spain
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,Spain
| | | | - Jose A Lekue
- Medical Services, Athletic Club, Lezama,Spain
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,Spain
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7
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Wolfe C, Page P, Voight M, Norman C, Draovitch P. The Deceleration Index - Is it the Missing Link in Rehabilitation? Int J Sports Phys Ther 2023; 18:73799. [PMID: 37020440 PMCID: PMC10069389 DOI: 10.26603/001c.73799] [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: 04/04/2023] Open
Abstract
The ability to decelerate is a key component of any successful rehabilitation program, yet it is often overlooked in favor of more traditional forms of rehabilitation and training. Deceleration, which is defined as the ability to reduce speed or momentum and stop or change direction, can be a key component of successful rehabilitation. The deceleration index is a new metric being used by some physical therapists and rehabilitation specialists to improve patient outcomes. The index is based on the principle that deceleration forces should match those created with acceleration. When patients can quickly and efficiently decelerate during physical activity, they are less likely to experience pain or injury. While the deceleration index is still in its early stages of development, there is promising evidence that it could be the missing link in effective rehabilitation. In this editorial commentary, we'll explore what the deceleration index is and why it is important to the rehabilitation process.
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Affiliation(s)
- Chris Wolfe
- Doctor of Physical Therapy Program Belmont University
| | - Phil Page
- Doctor of Physical Therapy Program Franciscan University
| | | | - Connor Norman
- Director of Sports Medicine-Football University of Georgia
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8
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Marqués-Jiménez D, Calleja-González J, Arratibel-Imaz I, Terrados N. Match Loads May Predict Neuromuscular Fatigue and Intermittent-Running Endurance Capacity Decrement after a Soccer Match. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15390. [PMID: 36430106 PMCID: PMC9692713 DOI: 10.3390/ijerph192215390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
How the match-derived load metrics relate to post-match fatigue in soccer is scarcely researched. Thus, the aim of this study was to determine the associations between soccer match-related internal and external loads, neuromuscular performance decrease and intermittent-running endurance capacity decrement immediately post-match. Vertical jump (countermovement jump), straight-line sprinting (10- and 20-m sprint), change of direction ability (T-test) and intermittent-running endurance capacity (YO-YO intermittent recovery level 2) were measured one day before and immediately after a friendly match in male soccer players. During the match, players' internal and external loads were also monitored, including heart rate-derived indices, total distance at various speed thresholds, average running velocity, maximal running velocity, number of sprints and number of accelerations and decelerations at various intensity thresholds. The results show that match-induced fatigue was reflected on neuromuscular performance and intermittent-running endurance capacity immediately post-match (p < 0.05). The quantification of percentage change of match external-load metrics, particularly accelerations and decelerations, provides a useful non-invasive predictor of subsequent neuromuscular fatigue status in soccer players immediately post-match (p < 0.05). However, only internal load metrics present a practical application for predicting intermittent-running endurance capacity impairment (p < 0.05). In summary, internal and external load metrics may allow for predicting the extent of acute fatigue, and variability between halves may represent a valuable alternative to facilitate the analysis of match-related fatigue both for research and applied purposes.
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Affiliation(s)
- Diego Marqués-Jiménez
- Valoración del Rendimiento Deportivo, Actividad Física y Salud y Lesiones Deportivas (REDAFLED), Department of Didactics of Musical, Plastic and Corporal Expression, Faculty of Education, University of Valladolid, 42004 Soria, Spain
| | - Julio Calleja-González
- Department of Physical Education and Sports, Faculty of Education & Sport, University of the Basque Country, 01007 Vitoria-Gasteiz, Spain
| | - Iñaki Arratibel-Imaz
- Department of Physical Education and Sports, Faculty of Education & Sport, University of the Basque Country, 01007 Vitoria-Gasteiz, Spain
- Sports Medicine Center Tolosa Kirol Medikuntza, 20400 Tolosa, Spain
| | - Nicolás Terrados
- Regional Unit of Sports Medicine of the Principality of Asturias (URMD), 33401 Avilés, Spain
- Health Research Institute of the Principality of Asturias (ISPA), 33011 Oviedo, Spain
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9
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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] [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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10
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Evans DA, Jackson DT, Kelly AL, Williams CA, McAuley AB, Knapman H, Morgan PT. Monitoring Postmatch Fatigue During a Competitive Season in Elite Youth Soccer Players. J Athl Train 2022; 57:184-190. [PMID: 34543430 PMCID: PMC8876877 DOI: 10.4085/1062-6050-0245.21] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
CONTEXT Countermovement jump (CMJ) and perceived wellness measures are useful for monitoring fatigue. Fatigue indicators should simultaneously show sensitivity to previous load and demonstrate influence on subsequent physical output; however, these factors have not been examined. OBJECTIVE To explore the efficacy of CMJ and wellness measures to both detect postmatch fatigue and predict subsequent physical match output in elite youth soccer players. DESIGN Cross-sectional study. PATIENTS OR OTHER PARTICIPANTS Sixteen soccer players (18 ± 1 years) from 36 English Football League Youth Alliance League fixtures. MAIN OUTCOME MEASURE(S) Physical match outputs (total distance, high-speed running, very high-speed running, and accelerations and decelerations [AD]) were recorded using a 10-Hz global positioning system and 200-Hz accelerometer device during competitive match play. The CMJ height and perceived wellness were assessed weekly and daily, respectively, as indirect indicators of fatigue. Four subunits of wellness (perceived soreness, energy, general stress, and sleep) were measured using customized psychometric questionnaires. RESULTS Simple linear regression showed that match AD predicted energy (R2 = 0.08, P = .001), stress (R2 = 0.09, P < .001), and total wellness (R2 = 0.06, P = .002) at 2 days postmatch. The CMJ (R2 = 0.05, P = .002), stress (R2 = 0.08, P < .001), sleep (R2 = 0.03, P = .034), and total wellness (R2 = 0.05, P = .006) measures at 5 days prematch predicted AD during the subsequent match. CONCLUSIONS The CMJ and wellness measures may be useful for detecting postmatch fatigue. Wellness scores, but not CMJ, at 5 days prematch influenced subsequent match output and therefore may be used to plan and periodize training for the upcoming microcycle.
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Affiliation(s)
- Daniel A. Evans
- Children's Health and Exercise Research Centre, College of Life & Environmental Sciences, University of Exeter, Devon, United Kingdom
| | - Daniel T. Jackson
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, West Midlands, United Kingdom
| | - Adam L. Kelly
- Children's Health and Exercise Research Centre, College of Life & Environmental Sciences, University of Exeter, Devon, United Kingdom
,Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, West Midlands, United Kingdom
,Exeter City Football Club, Devon, United Kingdom
| | - Craig A. Williams
- Children's Health and Exercise Research Centre, College of Life & Environmental Sciences, University of Exeter, Devon, United Kingdom
| | - Alexander B.T. McAuley
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, West Midlands, United Kingdom
| | | | - Paul T. Morgan
- Children's Health and Exercise Research Centre, College of Life & Environmental Sciences, University of Exeter, Devon, United Kingdom
,Exeter City Football Club, Devon, United Kingdom
,Department of Sport and Exercise Sciences, Manchester Metropolitan University, United Kingdom
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11
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A Practical Approach to Monitoring Biomarkers of Inflammation and Muscle Damage in Youth Soccer Players During a 6-Month Training Cycle. J Hum Kinet 2021; 80:185-197. [PMID: 34868428 PMCID: PMC8607760 DOI: 10.2478/hukin-2021-0093] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aim of the study was to determine the effects of a 6-month training cycle on muscle damage and inflammatory markers in youth male soccer players. Twenty-one soccer players were tested four times: at the beginning (T1) and immediately after the pre-season period (T2), in the middle (T3) and at the end of the competitive period (T4). Muscle damage and inflammatory markers were determined in blood taken 36 hours after the match. Throughout the training cycle significant increases (p < 0.05) of creatine kinase (T1: 254.4 U·L-1; T4: 304.2 U·L-1) and lactate dehydrogenase (T1: 382.8 U·L-1; T4: 453.2 U·L-1) activities were observed. Significant changes (p < 0.05) in platelet count (T1: 210.5·109·L-1; T4: 234.2·109·L-1), percentage of lymphocyte (T1: 39.80%; T4: 42.97%), monocyte (T1: 6.88%; T4: 9.99%) and granulocyte (T1: 53.32%; T4: 47.05%) as well as in granulocyte-to-lymphocyte (T1: 1.41; T4: 1.17) and lymphocyte-to-monocyte (T1: 6.21; T4: 4.46) ratios were noted. The correlation analysis revealed statistically significant relationships (p < 0.05) between: myoglobin and the percentage of leukocyte subpopulations and the granulocyte to lymphocyte ratio; lactate dehydrogenase and the percentage of monocyte; lactate and leukocyte count. In conclusion, the reported muscle damage and inflammatory markers in T3 and T4 indicate the need for fatigue status monitoring in youth soccer players, especially in the competitive period. Moreover granulocyte to lymphocyte and lymphocyte to monocyte ratios proved to be sensitive to fatigue changes and therefore can provide coaches and sport scientists with a broader perspective on the biochemical monitoring of training status in soccer players.
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12
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Deceleration Training in Team Sports: Another Potential 'Vaccine' for Sports-Related Injury? Sports Med 2021; 52:1-12. [PMID: 34716561 PMCID: PMC8761154 DOI: 10.1007/s40279-021-01583-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2021] [Indexed: 12/15/2022]
Abstract
High-intensity horizontal decelerations occur frequently in team sports and are typically performed to facilitate a reduction in momentum preceding a change of direction manoeuvre or following a sprinting action. The mechanical underpinnings of horizontal deceleration are unique compared to other high-intensity locomotive patterns (e.g., acceleration, maximal sprinting speed), and are characterised by a ground reaction force profile of high impact peaks and loading rates. The high mechanical loading conditions observed when performing rapid horizontal decelerations can lead to tissue damage and neuromuscular fatigue, which may diminish co-ordinative proficiency and an individual’s ability to skilfully dissipate braking loads. Furthermore, repetitive long-term deceleration loading cycles if not managed appropriately may propagate damage accumulation and offer an explanation for chronic aetiological consequences of the ‘mechanical fatigue failure’ phenomenon. Training strategies should look to enhance an athlete’s ability to skilfully dissipate braking loads, develop mechanically robust musculoskeletal structures, and ensure frequent high-intensity horizontal deceleration exposure in order to accustom individuals to the potentially damaging effects of intense decelerations that athletes will frequently perform in competition. Given the apparent importance of horizontal decelerations, in this Current Opinion article we provide considerations for sport science and medicine practitioners around the assessment, training and monitoring of horizontal deceleration. We feel these considerations could lead to new developments in injury-mitigation and physical development strategies in team sports.
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The Effect of High-Intensity Accelerations and Decelerations on Match Outcome of an Elite English League Two Football Team. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18189913. [PMID: 34574836 PMCID: PMC8471310 DOI: 10.3390/ijerph18189913] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 11/30/2022]
Abstract
Objectives: Previous research has highlighted the frequency of high-intensity accelerations and decelerations in elite football. The influence of these actions on match performance outcomes has not been established. The aim of the present study was to identify the influence of high-intensity accelerations and decelerations on match performance outcomes (i.e., win, draw, lost). Comparisons were also made between team and positional high-intensity accelerations and decelerations recorded within the games. Methods: 26 elite outfield footballers from an elite English Football League (EFL) Two team completed the present study. Global Positioning System (GPS) technology was utilised to quantify high-intensity accelerations and decelerations during 45 games in a competitive season. Magnitude analysis and the effects of results, positions and fixture periods were observed. Results: Significant effects of results, periods and positions were observed (p ≤ 0.05), with the highest outputs observed in games won. Positionally, fullbacks and centre forwards in a 4–3–3 formation exhibited the greatest frequency of high-intensity accelerations and decelerations. Very large differences were observed between the frequency of high-intensity decelerations compared to accelerations in games won (g = 2.37), drawn (g = 2.99) and lost (g = 3.59). The highest team frequencies of high-intensity accelerations (n = 3330) and decelerations (n = 6482) were completed in games won. Conclusions: The frequency of high-intensity accelerations and decelerations has a significant impact on match performance outcomes in an elite English League Two football team. Consideration needs to be given to specific conditioning and recovery strategies to optimise high-intensity acceleration and deceleration performance in games. Caution should be taken as these findings are representative of one team within the EFL.
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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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Daly LS, Catháin CÓ, Kelly DT. Gaelic Football Match-Play: Performance Attenuation and Timeline of Recovery. Sports (Basel) 2020; 8:sports8120166. [PMID: 33348584 PMCID: PMC7766974 DOI: 10.3390/sports8120166] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/09/2020] [Accepted: 12/15/2020] [Indexed: 02/06/2023] Open
Abstract
This study investigated acute changes in markers of fatigue and performance attenuation during and following a competitive senior club-level Gaelic football match. Forty-one players were tested immediately pre-match, at half-time, full-time, 24 h post-match and 48 h post-match. Creatine kinase, drop jump height and contact-time, reactive strength index, countermovement jump height and perceptual responses were assessed at the aforementioned time-points. 18 Hz global positioning system devices were used to record players in-game workload measures. Compared to pre-match, perceptual responses (−27.6%) and countermovement jump height (−3.9%) were significantly reduced at full-time (p < 0.05). Drop jump height (−8.8%), perceptual responses (−27.6%), reactive strength index (−15.6%) and countermovement jump height (−8.6%) were significantly lower 24 h post-match (p < 0.05). Pre-match creatine kinase was significantly increased (+16.2% to +159.9%) when compared to all other time-points (p < 0.05). Total distance, total accelerations, total sprints, sprint distance and average heart rate were all correlated to changes in perceptual responses (r = 0.34 to 0.56, p < 0.05). Additionally, maximum speed achieved (r = 0.34) and sprint distance (r = 0.31) were significantly related to countermovement jump changes (p < 0.05), while impacts (r = 0.36) were correlated to creatine kinase increases (p < 0.05). These results demonstrate that Gaelic football match-play elicits substantial neuromuscular, biochemical and perceptual disturbances.
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Affiliation(s)
- Lorcan S. Daly
- Department of Sport and Health Sciences, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (C.Ó.C.); (D.T.K.)
- SHE Research Group, Athlone Institute of Technology, N37 HD68 Athlone, Ireland
- Correspondence: ; Tel.: +353-87-6152751
| | - Ciarán Ó Catháin
- Department of Sport and Health Sciences, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (C.Ó.C.); (D.T.K.)
- SHE Research Group, Athlone Institute of Technology, N37 HD68 Athlone, Ireland
| | - David T. Kelly
- Department of Sport and Health Sciences, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (C.Ó.C.); (D.T.K.)
- SHE Research Group, Athlone Institute of Technology, N37 HD68 Athlone, Ireland
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Hader K, Rumpf MC, Hertzog M, Kilduff LP, Girard O, Silva JR. Monitoring the Athlete Match Response: Can External Load Variables Predict Post-match Acute and Residual Fatigue in Soccer? A Systematic Review with Meta-analysis. SPORTS MEDICINE-OPEN 2019; 5:48. [PMID: 31820260 PMCID: PMC6901634 DOI: 10.1186/s40798-019-0219-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 10/02/2019] [Indexed: 01/17/2023]
Abstract
BACKGROUND Monitoring athletes' external load during a soccer match may be useful to predict post-match acute and residual fatigue. This estimation would allow individual adjustments to training programs to minimize injury risk, improve well-being, and restore players' physical performance and inform the recovery process. METHODS Using a systematic review and meta-analysis of the literature, the aim is to determine which monitoring variables would be the strongest predictors of acute (immediately) and residual (up to 72 h) fatigue states in soccer. PubMed, SPORTDiscus, and Web of Science databases were searched (until September 2018). Studies concurrently examining soccer match-related external load metrics and subjective and/or objective measures were selected to determine pooled correlations ([Formula: see text]) with confidence intervals (CI). The quality and strength of the findings of each study were evaluated to identify overall levels of evidence. RESULTS Eleven studies were included (n = 165 athletes). Acute ([Formula: see text] = 0.67; 95% CI = [0.40, 0.94]) and residual (24 h post-match, [Formula: see text] = 0.54; 95% CI = [0.35, 0.65]) changes in muscle damage markers and countermovement jump peak power output (CMJPPO) were, with moderate to strong evidence, largely correlated with running distance above 5.5 m s-1. No other external load metric was largely correlated with both biochemical and neuromuscular markers. For every 100-m run above 5.5 m·s-1, CK activity measured 24 h post-match increased by 30% and CMJPPO decreased by 0.5%. Conversely, the total distance covered did not present any evidence of a clear relationship with any fatigue-related marker at any time-point. CONCLUSIONS Running distance above 5.5 m·s-1 represents the most sensitive monitoring variable characterizing biochemical and neuromuscular responses, at least when assessed during the initial 24 h (not at 48 h/72 h) post-match recovery period. In addition, total distance covered is not sensitive enough to inform decision-making during the fatigue monitoring process.
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Affiliation(s)
- Karim Hader
- National Sports Medicine Programme, Excellence in Football Project, Aspetar - Qatar Orthopaedic and Sports Medicine Hospital, P.O BOX 29222, Doha, Qatar.,Performance Department, Paris Saint-Germain F.C., Saint Germain-en-Laye, France
| | - Michael C Rumpf
- Auckland University of Technology, Sport Performance Research Institute New Zealand, Auckland, New Zealand.,Footballscience.net, Roedermark, Germany
| | - Maxime Hertzog
- National Sports Medicine Programme, Excellence in Football Project, Aspetar - Qatar Orthopaedic and Sports Medicine Hospital, P.O BOX 29222, Doha, Qatar
| | - Liam P Kilduff
- A-STEM, College of Engineering, Swansea University, Swansea, UK.,Welsh Institute of Performance Science, Sport Wales, Cardiff, UK
| | - Olivier Girard
- Murdoch Applied Sport Science Laboratory, Murdoch University, Perth, Western Australia
| | - Joao R Silva
- National Sports Medicine Programme, Excellence in Football Project, Aspetar - Qatar Orthopaedic and Sports Medicine Hospital, P.O BOX 29222, Doha, Qatar. .,Center of Research, Education, Innovation and Intervention in Sport (CIFI2D), Porto, Portugal.
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Harper DJ, Carling C, Kiely J. High-Intensity Acceleration and Deceleration Demands in Elite Team Sports Competitive Match Play: A Systematic Review and Meta-Analysis of Observational Studies. Sports Med 2019; 49:1923-1947. [PMID: 31506901 PMCID: PMC6851047 DOI: 10.1007/s40279-019-01170-1] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND The external movement loads imposed on players during competitive team sports are commonly measured using global positioning system devices. Information gleaned from analyses is employed to calibrate physical conditioning and injury prevention strategies with the external loads imposed during match play. Intense accelerations and decelerations are considered particularly important indicators of external load. However, to date, no prior meta-analysis has compared high and very high intensity acceleration and deceleration demands in elite team sports during competitive match play. OBJECTIVE The objective of this systematic review and meta-analysis was to quantify and compare high and very high intensity acceleration vs. deceleration demands occurring during competitive match play in elite team sport contexts. METHODS A systematic review of four electronic databases (CINAHL, MEDLINE, SPORTDiscus, Web of Science) was conducted to identify peer-reviewed articles published between January 2010 and April 2018 that had reported higher intensity (> 2.5 m·s-2) accelerations and decelerations concurrently in elite team sports competitive match play. A Boolean search phrase was developed using key words synonymous to team sports (population), acceleration and deceleration (comparators) and match play (outcome). Articles only eligible for meta-analysis were those that reported either or both high (> 2.5 m·s-2) and very high (> 3.5 m·s-2) intensity accelerations and decelerations concurrently using global positioning system devices (sampling rate: ≥ 5 Hz) during elite able-bodied (mean age: ≥ 18 years) team sports competitive match play (match time: ≥ 75%). Separate inverse random-effects meta-analyses were conducted to compare: (1) standardised mean differences (SMDs) in the frequency of high and very high intensity accelerations and decelerations occurring during match play, and (2) SMDs of temporal changes in high and very high intensity accelerations and decelerations across first and second half periods of match play. Using recent guidelines recommended for the collection, processing and reporting of global positioning system data, a checklist was produced to help inform a judgement about the methodological limitations (risk of detection bias) aligned to 'data collection', 'data processing' and 'normative profile' for each eligible study. For each study, each outcome was rated as either 'low', 'unclear' or 'high' risk of bias. RESULTS A total of 19 studies met the eligibility criteria, comprising seven team sports including American Football (n = 1), Australian Football (n = 2), hockey (n = 1), rugby league (n = 4), rugby sevens (n = 3), rugby union (n = 2) and soccer (n = 6) with a total of 469 male participants (mean age: 18-29 years). Analysis showed only American Football reported a greater frequency of high (SMD = 1.26; 95% confidence interval [CI] 1.06-1.43) and very high (SMD = 0.19; 95% CI - 0.42 to 0.80) intensity accelerations compared to decelerations. All other sports had a greater frequency of high and very high intensity decelerations compared to accelerations, with soccer demonstrating the greatest difference for both the high (SMD = - 1.74; 95% CI - 1.28 to - 2.21) and very high (SMD = - 3.19; 95% CI - 2.05 to - 4.33) intensity categories. When examining the temporal changes from the first to the second half periods of match play, there was a small decrease in both the frequency of high and very high intensity accelerations (SMD = 0.50 and 0.49, respectively) and decelerations (SMD = 0.42 and 0.46, respectively). The greatest risk of bias (40% 'high' risk of bias) observed across studies was in the 'data collection' procedures. The lowest risk of bias (35% 'low' risk of bias) was found in the development of a 'normative profile'. CONCLUSIONS To ensure that elite players are optimally prepared for the high-intensity accelerations and decelerations imposed during competitive match play, it is imperative that players are exposed to comparable demands under controlled training conditions. The results of this meta-analysis, accordingly, can inform practical training designs. Finally, guidelines and recommendations for conducting future research, using global positioning system devices, are suggested.
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Affiliation(s)
- Damian J Harper
- School of Sport, York St John University, Lord Mayors Walk, York, YO31 7EX, UK.
- Institute of Coaching and Performance, School of Sport and Wellbeing, University of Central Lancashire, Preston, PR1 2HE, UK.
| | - Christopher Carling
- Institute of Coaching and Performance, School of Sport and Wellbeing, University of Central Lancashire, Preston, PR1 2HE, UK
| | - John Kiely
- Institute of Coaching and Performance, School of Sport and Wellbeing, University of Central Lancashire, Preston, PR1 2HE, UK
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Hauer R, Tessitore A, Hauer K, Tschan H. Activity Profile of International Female Lacrosse Players. J Strength Cond Res 2019; 35:3207-3212. [PMID: 31343545 DOI: 10.1519/jsc.0000000000003253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hauer, R, Tessitore, A, Hauer, K, and Tschan, H. Activity profile of international female lacrosse players. J Strength Cond Res XX(X): 000-000, 2019-This study was designed to investigate the activity profile in international women's lacrosse match-play. Data were collected of 10 female Austrian lacrosse national team players (29.1 ± 6.1 years; 64.2 ± 5.0 kg; and 165.3 ± 4.1 cm) during 4 games of an international tournament using global positioning system and heart rate monitor devices. The mean average heart rate was 75.3 ± 5.0% of maximum heart rate (HRmax) with 23 ± 6.1% of total playing time spent in HRzone 4 (80-90% of HRmax). The mean distance covered during match-play was 3,791.6 ± 554.5 m, of which 38 ± 6.5% were performed in speed zone 1 (<7.0 km·h). Ten ±4 sprints per game were conducted with 55 ± 3.8% of accelerations and 59 ± 3.1% of decelerations in zone 1, respectively. Defenders showed greater total distance covered compared with other positions (attack: p = 0.035; d = 0.87; confidence interval [CI] = 0.18-1.56 and midfield: p = 0.006; d = 1.66; CI = 0.93-2.40). Midfielders covered less distance in speed zone 1 (p = 0.032; d = 1.91; CI = 0.53-3.28) compared with attackers, and lower numbers of accelerations (p = 0.042; d = 0.96; CI = 0.20-1.72) and decelerations (p = 0.021; d = 1.79; CI = 0.61-2.97) in zone 3 compared with defenders. Furthermore, attackers showed less distance covered in speed zone 1 (p = 0.09; d = 1.62; CI = 0.86-2.38) compared with defenders. The provided activity data could help coaches and practitioners in designing competition-specific programs for athletes. In addition, positional differences should be taken into account for tactical and physiological aspects.
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Affiliation(s)
- Richard Hauer
- University of Vienna, Center for Sports Science and University Sports, Vienna, Austria
| | - Antonio Tessitore
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico," Rome, Italy
| | - Klaus Hauer
- University of Vienna, Center for Sports Science and University Sports, Vienna, Austria
| | - Harald Tschan
- University of Vienna, Center for Sports Science and University Sports, Vienna, Austria
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