1
|
Belamjahad A, Tourny C, Jebabli N, Clark CCT, Laher I, Hackney AC, Granacher U, Zouhal H. Effects of a Preseason Neuromuscular Training Program vs. an Endurance-Dominated Program on Physical Fitness and Injury Prevention in Female Soccer Players. SPORTS MEDICINE - OPEN 2024; 10:76. [PMID: 38922502 PMCID: PMC11208342 DOI: 10.1186/s40798-024-00731-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 05/16/2024] [Indexed: 06/27/2024]
Abstract
BACKGROUND The pre-season preparatory period is considered key for optimizing the physical fitness levels needed to withstand congested match periods and preventing injuries during the regular soccer season. This study contrasted the effects s of neuromuscular training (NMT) versus an endurance-dominated training (ET) program conducted during the preseason on measures of physical fitness and injury occurrence in female soccer players. METHODS Twenty-four female soccer players aged 17.0 ± 1.3 years from a professional soccer club participated in this study. Players were randomly assigned to NMT (n = 12) or ET (n = 12) groups according to their playing position. The preseason intervention program lasted six weeks, with three weekly sessions with a duration of 45-60 min per session. Exercises in the NMT group included muscle strengthening exercises, plyometrics, agility and dynamic stability exercises, while the ET group practiced a traditional pre-season training program consisting of running and sprinting exercises, fartlek, and high-intensity interval training. The training volumes were similar in the two study groups. Anthropometric measurements, physical fitness tests (i.e., linear and change-of-direction speed, muscle strength and power tests) and the overall injury rate per 1000 h of exposure (training, match) were recorded throughout the season. RESULTS No between group differences were found at pre (T1). Significant group-by-time interactions were observed for the 5, 10, and 30-m linear sprint speed tests (p < 0.001, 2.16 < d < 2.58), the T-test (p = 0.024, d = 1.03), the squat (p < 0.001, d = 4.04), and the countermovement jump test (p < 0.001, d = 2.21), the Loughborough soccer passing test (LSPT) (p = 0.019, d = 1.08), and the 1-RM back squat test (p < 0.001, d = 2.53). Post-hoc tests indicated that NMT provided larger improvements for SJ, CMJ, 1-RM back squat, the 5-m sprint, 10-m sprint, 30-m sprint, T-test and LSPT compared to ET (1.07 > d > 2.77). The injury rate across the season was significantly lower in the NMT (5.1/1000 h exposure) compared to ET (11.8/1000 h exposure) (p = 0.014). CONCLUSIONS The findings support that six-weeks of preseason NMT versus ET induced larger performance improvements, and significantly reduced injury occurrence in elite female soccer players.
Collapse
Affiliation(s)
- Ali Belamjahad
- CETAPS UR 3832 (Research Center of Sport Science), University of Rouen Normandy, Rouen, France
| | - Claire Tourny
- CETAPS UR 3832 (Research Center of Sport Science), University of Rouen Normandy, Rouen, France
| | - Nidhal Jebabli
- High Institute of Sport and Physical Education of Kef, UR22JS01, University of Jendouba, Kef, Tunisia
| | - Cain C T Clark
- Institute for Health and Wellbeing, Coventry University, Coventry, CV1 5FB, UK
- College of Life Sciences, Birmingham City University, B15 3TN, Birmingham, UK
| | - Ismail Laher
- Department of Anesthesiology, Pharmacology and Therapeutics, The University of British Columbia, Vancouver, Canada
- Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Anthony C Hackney
- CETAPS UR 3832 (Research Center of Sport Science), University of Rouen Normandy, Rouen, France.
| | - Urs Granacher
- Department of Sport and Sport Science, Exercise and Human Movement Science, University of Freiburg, Freiburg, Germany.
| | - Hassane Zouhal
- Université Rennes, M2S (Laboratoire Mouvement, Sport, Rennes, Santé, France.
- Institut International des Sciences du Sport (2I2S), 35850, Irodouer, France.
| |
Collapse
|
2
|
Marques C, Rebelo M, Crisóstomo R, Honório S, Duarte-Mendes P, Petrica J, Serrano J. Descriptive analysis of injury types and incidence during futsal preseason across different competitive levels. Front Sports Act Living 2024; 6:1363006. [PMID: 38516534 PMCID: PMC10954807 DOI: 10.3389/fspor.2024.1363006] [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: 12/29/2023] [Accepted: 02/26/2024] [Indexed: 03/23/2024] Open
Abstract
Introduction This study aimed to verify the typology and incidence of injury by comparing the different competitive levels of futsal during the preseason. Methods The sample consisted of 68 senior male futsal players (24.26 ± 4.63 years). Data were collected using an injury recording grid that examined the affected body part, anatomical region, type of injury, mechanism, and severity. Results It was found that the elite group has the lowest incidence rate of injury (4.8 injuries per 1,000 h of exposure) compared to the sub-elite (11.8 injuries per 1,000 h of exposure) and amateur groups (13.9 injuries per 1,000 h of exposure). However, at this level, there is the highest percentage of injury occurrence (38.5%), the lower limb was the most affected part of the body (30.8%), and ligament (23.1%) and muscle (15.4%) injuries are the most prevalent. The most frequent mechanism of injury was non-traumatic (30.8%), and the majority were moderate injuries in the elite (23.1%) and sub-elite (17.9%) groups and severe injuries in the amateur group (12.5%). Discussion The amateur futsal players had the highest incidence of injury during the preseason period compared to the other competitive levels. Still, it was at the elite level where the highest percentage of injuries occurred, most of them non-traumatic and of ligament origin, primarily affecting the ankle region. The results highlight the importance of adopting specific injury prevention programs for ligament and muscle injuries during the preseason phase, regardless of the competitive level.
Collapse
Affiliation(s)
- Catarina Marques
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
| | - Miguel Rebelo
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport, Health & Exercise Research Unit (SHERU), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport Physical activity and health Research & INovation cenTer (SPRINT), Castelo Branco, Portugal
| | - Rute Crisóstomo
- AGE.COMM- Interdisciplinary Research Unit, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
| | - Samuel Honório
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport, Health & Exercise Research Unit (SHERU), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport Physical activity and health Research & INovation cenTer (SPRINT), Castelo Branco, Portugal
| | - Pedro Duarte-Mendes
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport, Health & Exercise Research Unit (SHERU), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport Physical activity and health Research & INovation cenTer (SPRINT), Castelo Branco, Portugal
| | - João Petrica
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport, Health & Exercise Research Unit (SHERU), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport Physical activity and health Research & INovation cenTer (SPRINT), Castelo Branco, Portugal
| | - João Serrano
- Department of Sportsand Well-Being, Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport, Health & Exercise Research Unit (SHERU), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal
- Sport Physical activity and health Research & INovation cenTer (SPRINT), Castelo Branco, Portugal
| |
Collapse
|
3
|
Oliveira TM, Ferreira TJ, Franca PAP, da Cruz RR, Bara-Filho MG, Cahuê FLC, Valente AP, Pierucci APTR. A Decrease in Branched-Chain Amino Acids after a Competitive Male Professional Volleyball Game-A Metabolomic-Based Approach. Metabolites 2024; 14:115. [PMID: 38393007 PMCID: PMC10890579 DOI: 10.3390/metabo14020115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/30/2023] [Accepted: 01/21/2024] [Indexed: 02/25/2024] Open
Abstract
A competitive volleyball game is a highly metabolic and physically demanding event for professional players. This study aimed to investigate whether a single game at the end of a preseason promotes changes in the biochemical markers of physical exercise responses and the metabolomic profile of professional volleyball players. This cross-sectional study included 13 male Brazilian professional volleyball players. Food intake, body composition, heart rate, physical movement variables, and blood biochemical indicators were evaluated. For non-target metabolomic analysis, serum samples were subjected to 500 MHz Nuclear Magnetic Resonance. Data analysis showed no significant difference in the biochemical indicators after the game (p > 0.05). The level of metabolites present in the groups of the main components (β-hydroxybutyrate, arginine/lysine, isoleucine, leucine, and valine) had decreased after the game. However, formic acid and histidine levels increased. Among the compounds not part of the main components, hypoxanthine and tyrosine increased, whereas low-density lipoprotein and very low-density lipoprotein levels decreased. After the game, the metabolomic profiles of players showed significant negative variations in essential amino acids (leucine, valine, and isoleucine). These decreases might be influenced by athlete diet and reduced glycogen storage due to lower carbohydrate intake, potentially impacting serum-essential amino acid levels via oxidation in skeletal muscle. The study provides insights for developing metabolic compensation strategies in athletes.
Collapse
Affiliation(s)
- Taillan Martins Oliveira
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Tathiany Jéssica Ferreira
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Paula Albuquerque Penna Franca
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Rudson Ribeiro da Cruz
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | | | - Fábio Luiz Candido Cahuê
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Ana Paula Valente
- Medical Biochemistry Institute, National Center for Nuclear Magnetic Resonance, Universidade Federal Do Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Anna Paola Trindade Rocha Pierucci
- Laboratory of Food Development for Special Health Purpose and Education (DAFEE), Nutrition Institute Josué de Castro (INJC), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| |
Collapse
|
4
|
Söyler M, Zileli R, Çingöz YE, Kılınçarslan G, Kayantaş İ, Altuğ T, Asan S, Şahin M, Gürkan AC. The effect of high-intensity plyometric training on anaerobic performance parameters: a pilot study in U17 elite A league. PeerJ 2024; 12:e16648. [PMID: 38223755 PMCID: PMC10787543 DOI: 10.7717/peerj.16648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 11/20/2023] [Indexed: 01/16/2024] Open
Abstract
The aim of this study was to examine the effects of high-intensity plyometric training (HIPT) on some parameters in elite soccer players in the U17. Volunteer soccer players were randomly divided into two groups according to their positions: the regular training (RT) group (age: 16.71 ± 0.47 years; stature: 163.46 ± 3.31 cm; body weight: 61.04 ± 1.59 kg) and the HIPT group (age: 16.64 ± 0.50 years; stature: 165.60 ± 3.03 cm; body weight: 59.76 ± 1.92 kg), and each group included five defenders, five midfielders, and four attackers. While the RT group did only routine soccer training, the HIPT group performed high-intensity plyometric training three days a week in addition to routine soccer training. In the study, body weight, stature, sprint (10 m, 30 m, and 40 m), jump (standing long jump, right and left-limb triple hop) and 5-0-5 change of direction speed test measurements of the soccer players were taken. Skewness and Kurtosis values obtained from the pre-test and post-test measurements were calculated to test whether the normality assumption of the study was met. A mixed measure two-way ANOVA test was used to determine the difference between the pre-test and post-test. The significance was set as p < 0.05. The results indicated that 8-week high- intensity plyometric training provided more improvement in measured performance parameters than routine soccer training. As a result, when the data obtained is examined, it can be said that HIPT had better values in sprint, jump, and change of direction parameters, so plyometric training was more beneficial for anaerobic parameters than routine soccer training in children. It is recommended that the trainers make their plans considering these results.
Collapse
Affiliation(s)
- Mehmet Söyler
- Vocational School of Social Sciences, Çankırı Karatekin University, Çankırı, Türkiye
| | - Raif Zileli
- Faculty of Health Sciences, Bilecik Şeyh Edebali University, Bilecik, Türkiye
| | | | | | - İdris Kayantaş
- Faculty of Sport Sciences, Bingöl University, Bingöl, Türkiye
| | - Tolga Altuğ
- Faculty of Sport Sciences, Ağrı İbrahim Çeçen University, Ağrı, Türkiye
| | - Selim Asan
- Faculty of Sport Sciences, Erzurum Technical University, Erzurum, Türkiye
| | - Musa Şahin
- Faculty of Sport Sciences, Karabük University, Karabük, Türkiye
| | - Alper Cenk Gürkan
- Vocational School of Healthy Services, Gazi University Ankara, Ankara, Türkiye
| |
Collapse
|
5
|
Kasum M, Gavic L, Mandic P, Tadin A. Knowledge of traumatic dental injuries and mouthguard behavior among Croatian soccer players. Dent Traumatol 2023; 39:555-564. [PMID: 37341423 DOI: 10.1111/edt.12862] [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: 11/05/2022] [Revised: 05/13/2023] [Accepted: 05/26/2023] [Indexed: 06/22/2023]
Abstract
OBJECTIVES/AIM Sports-related dental injuries occur frequently among athletes due to inadequate knowledge and prevention measures. The aim of the study was to assess knowledge, attitudes, and practices of active soccer players from all leagues in Croatia regarding traumatic dental injuries and the use of mouthguards. MATERIAL AND METHODS 393 respondents completed a questionnaire-based online survey from March 2022 to April 2022. The questionnaire consisted of 37 questions divided in four sections: demographic characteristics, experience with orofacial injuries, knowledge of emergency therapeutic procedures for dental injuries, and behaviors related to the use of a mouthguard. RESULTS Insufficient knowledge was confirmed by a total score of 2.8 ± 2.8 points, with a possible maximum of 11. Respondents' better knowledge can be associated with educational level (p = .002), playing position (p = .046), and personally experienced injuries to the face and jaw (p ≤ .001) and teeth (p = .022). Less than 40% of respondents suffered facial and jaw injuries while playing football and 18.6% suffered dental injuries. Although most respondents (93.9%) were familiar with mouthguards and 68.9% believed that they help prevent injuries while playing football, only 16% used them. CONCLUSION The study revealed significant gaps in knowledge regarding dental injuries and the practice of mouthguard usage among Croatian soccer players. Therefore, it is evident that additional education is needed to prevent dental injuries and take proper procedures when taking care of them among the examined population.
Collapse
Affiliation(s)
- Marin Kasum
- Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
| | - Lidia Gavic
- Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
| | | | - Antonija Tadin
- Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
- Department of Maxillofacial Surgery, Clinical Hospital Centre Split, Split, Croatia
| |
Collapse
|
6
|
Branquinho L, Forte P, Thomatieli-Santos RV, de França E, Marinho DA, Teixeira JE, Ferraz R. Perspectives on Player Performance during FIFA World Cup Qatar 2022: A Brief Report. Sports (Basel) 2023; 11:174. [PMID: 37755851 PMCID: PMC10534916 DOI: 10.3390/sports11090174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/09/2022] [Accepted: 08/01/2023] [Indexed: 09/28/2023] Open
Abstract
Changing the date of the FIFA World Cup Qatar 2022 may represent a factor to consider for the expected performance of participating players. This was due to fixture congestion at the start of the season and expected weather conditions during the competition. Thus, the main purpose of this brief report was to critically analyze the potential impact of changing the competition date and weather conditions on players' performance. In addition, a brief description about the performance during the World Cup is also provided. For the research, the Web of Science, PubMed and SPORTDiscus databases were accessed using the primary keywords FIFA World Cup and World Soccer Cup associated with the secondary keywords match running performance, fixture congestion, fatigue and weather conditions. After applying inclusion and exclusion criteria, 52 articles were considered for analysis. The results seem to indicate that although changes were expected due to the modifications made (i.e., the competition date and scheduling congestion), the performance of the players seems not to have been affected in terms of the analyzed indicators. Furthermore, it seems possible to identify some patterns in the behavior of the teams that reached the most advanced stages of the competition.
Collapse
Affiliation(s)
- Luís Branquinho
- Department of Sports, Higher Institute of Educational Sciences of the Douro, 4560-708 Penafiel, Portugal
- Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 6201-001 Covilhã, Portugal
- Research Centre of Higher Institute of Educational Sciences, CI-ISCE/ISCE Douro, 2620-379 Ramada, Portugal
| | - Pedro Forte
- Department of Sports, Higher Institute of Educational Sciences of the Douro, 4560-708 Penafiel, Portugal
- Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 6201-001 Covilhã, Portugal
- Research Centre of Higher Institute of Educational Sciences, CI-ISCE/ISCE Douro, 2620-379 Ramada, Portugal
- Department of Sport Sciences and Physical Education, Polytechnic Institute of Bragança (IPB), 5300-253 Bragança, Portugal
| | | | - Elias de França
- Department of Biosciences, Federal University of São Paulo, São Paulo 04040-003, Brazil
| | - Daniel A. Marinho
- Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 6201-001 Covilhã, Portugal
- Department of Sports Sciences, University of Beira Interior, 6201-001 Covilhã, Portugal
| | - José E. Teixeira
- Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 6201-001 Covilhã, Portugal
- Department of Sport Sciences and Physical Education, Polytechnic Institute of Bragança (IPB), 5300-253 Bragança, Portugal
| | - Ricardo Ferraz
- Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 6201-001 Covilhã, Portugal
- Department of Sports Sciences, University of Beira Interior, 6201-001 Covilhã, Portugal
| |
Collapse
|
7
|
Lopes M, Martins F, Brito J, Figueiredo P, Tomás R, Ribeiro F, Travassos B. Epidemiology of Injuries in Elite Male Futsal Players. Clin J Sport Med 2023; 33:527-532. [PMID: 37185914 DOI: 10.1097/jsm.0000000000001142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 02/21/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE This study aimed to describe and characterize injuries sustained by elite male futsal players in Portugal. DESIGN Prospective cohort study. SETTING Top-tier Portuguese league in the 2019 to 2020 season. PARTICIPANTS One hundred sixty-seven players from 9 elite/international-level (tier 4) futsal teams. INDEPENDENT VARIABLES The location, type, body side, body part, mechanism of injury, severity, occurrence, days lost, training, and match exposure were collected. MAIN OUTCOME MEASURES Injury incidence, prevalence, and burden. RESULTS The study was conducted during an 8-month season. A total of 133 injuries were recorded, and 92 (67.6%) players sustained injuries. The overall time-loss injury incidence was 4.5 injuries per 1000 hours of exposure. Injury incidence during matches was higher than during training sessions (25.9 vs 3.0 per 1000 hours of exposure, respectively). Average time loss was 9 days, and moderate injuries were the most frequent (44%), followed by mild injuries (24%). Injury burden was 73.8 days lost per 1000 hours of total player exposure. Sprains/ligament (29%) and muscle rupture/tear/strains (32%) were the most common injuries. The groin (19%), thigh (17%), knee (19%), and ankle (15%) were the most affected body areas. Noncontact injuries were the most reported mechanism (65%), and 24% were overuse injuries. CONCLUSIONS This study showed that elite/international-level (tier 4) male futsal players are more prone to noncontact injuries, primarily affecting the lower limbs. The incidence during match play increased by 9-fold compared with training sessions.
Collapse
Affiliation(s)
- Mário Lopes
- Institute of Biomedicine, School of Health Sciences, University of Aveiro, Aveiro, Portugal
| | | | - João Brito
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Pedro Figueiredo
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
- Physical Education Department, College of Education, United Arab Emirates University, Al Ain, United Arab Emirates
- Research Centre in Sports, Health and Human Development, CIDESD, Vila Real, Portugal; and
| | - Rita Tomás
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Fernando Ribeiro
- Institute of Biomedicine, School of Health Sciences, University of Aveiro, Aveiro, Portugal
| | - Bruno Travassos
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
- Research Centre in Sports, Health and Human Development, CIDESD, Vila Real, Portugal; and
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
| |
Collapse
|
8
|
Huang Y, Li C, Bai Z, Wang Y, Ye X, Gui Y, Lu Q. The impact of sport-specific physical fitness change patterns on lower limb non-contact injury risk in youth female basketball players: a pilot study based on field testing and machine learning. Front Physiol 2023; 14:1182755. [PMID: 37250119 PMCID: PMC10213459 DOI: 10.3389/fphys.2023.1182755] [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: 03/09/2023] [Accepted: 05/02/2023] [Indexed: 05/31/2023] Open
Abstract
Background: In recent years, identifying players with injury risk through physical fitness assessment has become a hot topic in sports science research. Although practitioners have conducted many studies on the relationship between physical fitness and the likelihood of injury, the relationship between the two remains indeterminate. Consequently, this study utilized machine learning to preliminary investigate the relationship between individual physical fitness tests and injury risk, aiming to identify whether patterns of physical fitness change have an impact on injury risk. Methods: This study conducted a retrospective analysis by extracting the records of 17 young female basketball players from the sport-specific physical fitness monitoring and injury registration database in Fujian Province. Sports-specific physical fitness tests included physical performance, physiological, biochemical, and subjective perceived responses. The data for each player was standardized individually using Z-scores. Synthetic minority over-sampling techniques and edited nearest neighbor algorithms were used to sample the training set to address the negative impact of class imbalance on model performance. Feature extraction was performed on the dataset using linear discriminant analysis, and the prediction model was constructed using the cost-sensitive neural network. Results: The 10 replicate 5-fold stratified cross-validation showed that the lower limb non-contact injury prediction model based on the cost-sensitive neural network had achieved good discrimination and calibration (average Precision: 0.6360; average Recall: 0.8700; average F2-Score: 0.7980; average AUC: 0.8590; average Brier-score: 0.1020), which could be well applied in training practice. According to the attribution analysis, agility and speed were important physical attributes that affect youth female basketball players' non-contact lower limb injury risk. Specifically, there was enhance in the performance of the 1-min double under, accompanied by an increase in urinary ketone and urinary blood levels following the agility test. The 3/4 basketball court sprint performance improved, while urinary protein and RPE levels decreased after the speed test. Conclusion: The sport-specific physical fitness change pattern can impact the lower limb non-contact injury risk of young female basketball players in Fujian Province, specifically in terms of agility and speed. These findings will provide valuable insights for planning athletes' physical training programs, managing fatigue, and preventing injuries.
Collapse
Affiliation(s)
- Yuanqi Huang
- School of Science, Jimei University, Xiamen, China
- School of Physical Education and Sport Science, Fujian Normal University, Fuzhou, China
| | - Changfei Li
- Fujian Provincial Basketball and Volleyball Centre, Fuzhou, China
| | - Zhanshuang Bai
- School of Physical Education and Sport Science, Fujian Normal University, Fuzhou, China
- School of Tourism and Sports Health, Hezhou University, Hezhou, China
| | - Yukun Wang
- Institute of Sport Business, Loughborough University London, London, United Kingdom
| | - Xiaohong Ye
- Chengyi College, Jimei University, Xiamen, China
| | - Yuheng Gui
- Fujian Provincial Basketball and Volleyball Centre, Fuzhou, China
| | - Qiang Lu
- School of Science, Jimei University, Xiamen, China
| |
Collapse
|
9
|
Thomakos P, Spyrou K, Katsikas C, Geladas ND, Bogdanis GC. Effects of Concurrent High-Intensity and Strength Training on Muscle Power and Aerobic Performance in Young Soccer Players during the Pre-Season. Sports (Basel) 2023; 11:sports11030059. [PMID: 36976945 PMCID: PMC10099725 DOI: 10.3390/sports11030059] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/20/2023] [Accepted: 03/02/2023] [Indexed: 03/09/2023] Open
Abstract
The aim of the present study was to evaluate two different intervention programs applied during a 4-week pre-season period. Twenty-nine players participated in this study and were divided into two groups. One group (BallTrain, n = 12, age: 17.8 ± 0.4 years, body mass: 73.9 ± 7.6 kg, height: 178 ± 0.1 cm, body fat: 9.6 ± 5.3%) performed a higher percentage of aerobic training with ball and strength training using plyometrics and exercises with body weight. The other group (HIITTrain, n = 17, age: 17.8 ± 0.7 years, body mass: 73.3 ± 5.0 kg, height: 179 ± 0.1 cm, body fat: 8.0 ± 2.3%) trained with high-intensity interval training (HIIT) without the ball and performed resistance training with weights in the same session. Both groups trained for strength (two times/week) and performed aerobic–anaerobic fitness without the ball, passing games, and tactical and small-sided games. Lower limb power (CMJ) and aerobic fitness (Yo-Yo intermittent recovery test level 1-IR1) were evaluated before and after the four-week training program. Yo-Yo IR1 performance was improved in both groups, but the improvement was greater for the HIITTrain than BallTrain group (468 ± 180 vs. 183 ± 177 m, p = 0.07). CMJ showed a non-significant improvement in the BallTrain group (5.8 ± 8.8%, p = 0.16), but it decreased by 8.1 ± 9% (p = 0.001), in the HIITTrain group. In conclusion, we have shown that a short pre-season period of training results in improvements in aerobic fitness in both groups, with high-intensity interval training showing superior adaptations than training with the ball. However, CMJ performance was reduced in this group, possibly suggesting higher fatigue levels and overload, and/or showing the effects of concurrent HIITTrain and strength training in soccer.
Collapse
Affiliation(s)
- Pierros Thomakos
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece
- Correspondence:
| | - Konstantinos Spyrou
- UCAM Research Center for High Performance Sport, UCAM Universidad Catόlica de Murcia, 30005 Murcia, Spain
- Facultad de Deporte, UCAM Universidad Católica de Murcia, 30005 Murcia, Spain
| | - Christos Katsikas
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece
| | - Nikolaos D. Geladas
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece
| | - Gregory C. Bogdanis
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece
| |
Collapse
|
10
|
Maniar N, Carmichael DS, Hickey JT, Timmins RG, San Jose AJ, Dickson J, Opar D. Incidence and prevalence of hamstring injuries in field-based team sports: a systematic review and meta-analysis of 5952 injuries from over 7 million exposure hours. Br J Sports Med 2023; 57:109-116. [PMID: 36455927 DOI: 10.1136/bjsports-2021-104936] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVE This study aimed to systematically review and meta-analyse the incidence and prevalence of hamstring injuries in field-based team sports. A secondary aim was to determine the impact of other potential effect moderators (match vs training; sport; playing surface; cohort age, mass and stature; and year when data was collected) on the incidence of hamstring injury in field-based team sports. DESIGN Systematic review and meta-analysis. DATA SOURCES CINAHL, Cochrane Library, MEDLINE Complete (EBSCO), Embase, Web of Science and SPORTDiscus databases were searched from database inception to 5 August 2020. ELIGIBILITY CRITERIA Prospective cohort studies that assessed the incidence of hamstring injuries in field-based team sports. METHOD Following database search, article retrieval and title and abstract screening, articles were assessed for eligibility against predefined criteria then assessed for methodological quality using the Critical Appraisal Tool for prevalence studies. Meta-analysis was used to pool data across studies, with meta-regression used where possible. RESULTS Sixty-three articles were included in the meta-analysis, encompassing 5952 injuries and 7 262 168 hours of exposure across six field-based team sports (soccer, rugby union, field hockey, Gaelic football, hurling and Australian football). Hamstring injury incidence was 0.81 per 1000 hours, representing 10% of all injuries. Prevalence for a 9-month period was 13%, increasing 1.13-fold for every additional month of observation (p=0.004). Hamstring injury incidence increased 6.4% for every 1 year of increased average cohort age, was 9.4-fold higher in match compared with training scenarios (p=0.003) and was 1.5-fold higher on grass compared with artificial turf surfaces (p<0.001). Hamstring injury incidence was not significantly moderated by average cohort mass (p=0.542) or stature (p=0.593), was not significantly different between sports (p=0.150) and has not significantly changed over the last 30 years (p=0.269). CONCLUSION Hamstring injury represents 10% of all injuries in field-based team sports, with 13% of the athletes experiencing a hamstring injury over a 9-month period most commonly during matches. More work is needed to reduce the incidence of hamstring injury in field-based team sports. PROSPERO REGISTRATION NUMBER CRD42020200022.
Collapse
Affiliation(s)
- Nirav Maniar
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia .,Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Melbourne, Victoria, Australia
| | | | - Jack Thomas Hickey
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia.,Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Melbourne, Victoria, Australia
| | - Ryan Gregory Timmins
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia.,Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Melbourne, Victoria, Australia
| | - Argell Joseph San Jose
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia
| | - Jessica Dickson
- Library and Academic Research Services, Australian Catholic University, Melbourne, Victoria, Australia
| | - David Opar
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia.,Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Melbourne, Victoria, Australia
| |
Collapse
|
11
|
Jiang Z, Hao Y, Jin N, Li Y. A Systematic Review of the Relationship between Workload and Injury Risk of Professional Male Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph192013237. [PMID: 36293817 PMCID: PMC9602492 DOI: 10.3390/ijerph192013237] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/05/2022] [Accepted: 10/11/2022] [Indexed: 05/05/2023]
Abstract
The number of studies on the relationship between training and competition load and injury has increased exponentially in recent years, and it is also widely studied by researchers in the field of professional soccer. In order to provide practical guidance for workload management and injury prevention in professional athletes, this study provides a review of the literature on the effect of load on injury risk, injury prediction, and interpretation mechanisms. The results of the research show that: (1) It appears that short-term fixture congestion may increase the match injury incidence, while long-term fixture congestion may have no effect on both the overall injury incidence and the match injury incidence. (2) It is impossible to determine conclusively whether any global positioning system (GPS)-derived metrics (total distance, high-speed running distance, and acceleration) are associated with an increased risk of injury. (3) The acute:chronic workload ratio (ACWR) of the session rating of perceived exertion (s-RPE) may be significantly associated with the risk of non-contact injuries, but an ACWR threshold with a minimum risk of injury could not be obtained. (4) Based on the workload and fatigue recovery factors, artificial intelligence technology may possess good predictive power regarding injury risk.
Collapse
Affiliation(s)
- Zhiyuan Jiang
- Sports Coaching College, Beijing Sport University, Beijing 100084, China
| | - Yuerong Hao
- School of Physical Education, Qingdao University, Qingdao 266071, China
| | - Naijing Jin
- Sports Coaching College, Beijing Sport University, Beijing 100084, China
| | - Yue Li
- Physical Department, Shenzhen Institute of Information Technology, Shenzhen 518172, China
- Correspondence:
| |
Collapse
|
12
|
Silva JR. The soccer season: performance variations and evolutionary trends. PeerJ 2022; 10:e14082. [PMID: 36217385 PMCID: PMC9547588 DOI: 10.7717/peerj.14082] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 08/29/2022] [Indexed: 01/20/2023] Open
Abstract
The physiological demands of soccer challenge the entire spectrum of the response capacity of the biological systems and fitness requirements of the players. In this review we examined variations and evolutionary trends in body composition, neuromuscular and endurance-related parameters, as well as in game-related physical parameters of professional players. Further, we explore aspects relevant for training monitoring and we reference how different training stimulus and situational variables (e.g., competition exposure) affect the physiological and performance parameters of players. Generally, improvements of small magnitude in non- (non-CMJ) and countermovement-based jumps (CMJBased) and in the sprint acceleration (ACCPhase) and maximal velocity phase (MVPhase) are observed from start of preparation phase (PPS) to beginning of competition phase (BCP). A greater magnitude of increases is observed in physiological and endurance performance measures within this period; moderate magnitude in sub-maximal intensity exercise (velocity at fixed blood lactate concentrations; V2-4mmol/l) and large magnitude in VO2max, maximal aerobic speed (MAS) and intense intermittent exercise performance (IE). In the middle of competition phase (MCP), small (CMJBased and ACCPhase), moderate (non-CMJ; MVPhase; VO2max; sub-maximal exercise) and large (MAS and IE) improvements were observed compared to PPS. In the end of competition period (ECP), CMJBased and MVPhase improve to a small extent with non-CMJ, and ACCPhase, VO2max, MAS, sub-maximal intensity exercise and IE revealing moderate increments compared to PPS. Although less investigated, there are generally observed alterations of trivial magnitude in neuromuscular and endurance-related parameters between in-season assessments; only substantial alterations are examined for IE and sub-maximal exercise performance (decrease and increase of small magnitude, respectively) from BCP to MCP and in VO2max and IE (decrements of small magnitude) from MCP to ECP. Match performance may vary during the season. Although, the variability between studies is clear for TD, VHSR and sprint, all the studies observed substantial increments in HSR between MCP and ECP. Finally, studies examining evolutionary trends by means of exercise and competition performance measures suggests of a heightened importance of neuromuscular factors. In conclusion, during the preseason players "recover" body composition profile and neuromuscular and endurance competitive capacity. Within in-season, and more robustly towards ECP, alterations in neuromuscular performance seem to be force-velocity dependent, and in some cases, physiological determinants and endurance performance may be compromised when considering other in-season moments. Importantly, there is a substantial variability in team responses that can be observed during in-season. Consequently, this informs on the need to both provide a regular training stimulus and adequate monitorization throughout the season.
Collapse
Affiliation(s)
- Joao Renato Silva
- Center for Research, Education, Innovation, and Intervention in Sport (CIFI2D), Faculty of Sport, University of Porto, Portugal
| |
Collapse
|
13
|
Zouhal H, Barthélémy B, Dellal A, Zouita S, Ben Abderrahman A, Ben Ounis O, Tourny C, Belamjahad A, Ahmaidi S, Paillard T, Dyon N, Bideau B, Saeidi A, Moran J, Chaouachi A, Nassis GP, Carling C, Granacher U, Ravé G. FIFA World Cup Qatar 2022: Solutions to the Physical Fitness Challenge. J Sports Sci Med 2022; 21:482-486. [PMID: 36157392 PMCID: PMC9459774 DOI: 10.52082/jssm.2022.482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 08/23/2022] [Indexed: 06/16/2023]
Abstract
In 2022, the FIFA World Cup has been scheduled to take place in Qatar in November and December, months which coincide with the in-season period of the European soccer season. This will be challenging for the staff of the participating national teams and the domestic clubs to which participating players are attached. The aim of this letter to the editor is to propose solutions on how to manage the associated challenges.
Regular training and competition over the course of a season in European professional soccer is generally characterized by a pre-competition preparation period of five to six weeks, followed by two competition phases, interspersed with a winter break (Eliakim et al., 2018). Certain leagues such as the English Premier League do not typically have a winter break meaning that games are played almost continuously across the season. During World Cup years, there is usually an average of four to five weeks between the end of national domestic championships and the start of the World Cup tournament (Table 1, Figure 1) which traditionally takes place during the off-season period.
However, in 2022, the FIFA World Cup has been scheduled to take place in November and December, months which coincide with the in-season period of the European soccer season (Figure 1). With the World Cup being staged during this part of the season, many national team players (notably those in the major European Leagues) will have just one week of preparation between the last match of their domestic leagues and the start of the World Cup tournament (November 20th, 2022). More precisely, the major European soccer leagues will interrupt match schedules between November 9th and 13th with differences in the number of games completed at this time of the season ranging from 14 to 17 across the various leagues (Table 2).
The physical and mental demands placed on modern professional players have steadily risen over recent years due to an increase in the number of matches played during congested periods across the season (Anderson et al., 2016). Since the number of matches is not evenly distributed across the typical 40-week season, players can often compete in as many as three matches in a seven-day period. Aside from the physical and mental demands that are imposed during a match, players might experience insufficient recovery between these games; in part due to extensive travelling which can disrupt the sleep/wake cycle (Lastella et al., 2019). Indeed, poor quality of sleep and the stress induced by a match can negatively affect physical fitness and may even increase the risk of sustaining injuries and/or infections (Clemente et al., 2021) in the period leading up to the World Cup.
National teams are composed of players from different leagues who have varying levels of exposure to match-play (e.g., starters, non-starters) in terms of the average weekly volume of soccer matches at their clubs (“Rapports - Observatoire du football CIES”). Moreover, both starters and non-starters are exposed to different external match and training loads (Anderson et al., 2016). External loads have previously been defined as the overall volume of activity that a player performs during both training sessions and matches (Ravé et al., 2020). There is evidence that this metric correlates with a player’s physical fitness status (Clemente et al., 2019) and their injury risk (Malone et al., 2017). Accordingly, it will be challenging for national teams to manage the fitness of players such that they are physically ready to play at the World Cup tournament. This is especially applicable to individuals who play in the major European leagues and we note a significant contrast between European match schedules and those on other continents. For example, in Major League Soccer (MLS) in North America, match schedules will be interrupted from November 5th, 15 days before the World Cup tournament begins. Similarly, in the Japanese J-League in Asia, Saudi Pro League and Qatar Star League, matches will be interrupted one month before the World Cup tournament begins, leaving more time for players on these continents to prepare.
It is also important to note that the French, Spanish and English domestic championships will resume their match schedules on December 27th which is just ten days after the end of the World Cup (Figure 1). Clubs will clearly want their players to return uninjured and with sufficient fitness levels to resume domestic competition but these goals could be compromised by the aforementioned scheduling of the World Cup tournament.
Collapse
Affiliation(s)
- Hassane Zouhal
- University Rennes, M2S (Laboratoire Mouvement, Sport, Santé) - EA 1274, F-35000 Rennes, France
- Institute International des Sciences du Sport (2I2S), 35850, Irodouer, France
| | - Benjamin Barthélémy
- University Rennes, M2S (Laboratoire Mouvement, Sport, Santé) - EA 1274, F-35000 Rennes, France
- Toulouse Football Club (FC Toulouse), Toulouse, France
| | - Alexandre Dellal
- FIFA Medical Centre of Excellence, Centre orthopédique Santé, Lyon, France
- MyCoach Performance, Nice, France
| | - Sghaeir Zouita
- Higher Institute of Sport and Physical Education of Ksar-Said, Tunisia
| | | | - Omar Ben Ounis
- Higher Institute of Sport and Physical Education of Ksar-Said, Tunisia
| | - Claire Tourny
- Department of Sport Sciences, University of Rouen, Rouen, France
| | - Ali Belamjahad
- Department of Sport Sciences, University of Rouen, Rouen, France
| | - Said Ahmaidi
- Department of Sport Sciences, University of Amiens-Picardie, Amiens, France
| | - Thierry Paillard
- Department of Sport Sciences, University of Pays de l’Adour, Tarbes, France
| | | | - Benoit Bideau
- University Rennes, M2S (Laboratoire Mouvement, Sport, Santé) - EA 1274, F-35000 Rennes, France
| | - Ayoub Saeidi
- Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, University of Kurdistan, Sanandaj, Kurdistan, Iran
| | - Jason Moran
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester. Essex, UK
| | - Anis Chaouachi
- Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - George P. Nassis
- Physical Education Department, College of Education, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
- Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Christopher Carling
- Fédération Française de Football, Paris, France
- Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport (INSEP), Paris, France
| | - Urs Granacher
- Department of Sport and Sport Science, University of Freiburg, Freiburg, Germany
| | | |
Collapse
|
14
|
Relationships between Fitness Status and Blood Biomarkers in Professional Soccer Players. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:5135817. [PMID: 35449856 PMCID: PMC9017447 DOI: 10.1155/2022/5135817] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/11/2022] [Accepted: 03/07/2022] [Indexed: 12/11/2022]
Abstract
Background Physical conditions are recognized to be optimal after the pre-season (PS) phase in professional sports. Given that blood measures may also reveal variations, which in turn, may present associations with fitness changes. Objective The aim of this study is to test the changes of blood markers and physical fitness outcomes at the beginning and following the PS phase. Additionally, we aimed also to analyze the associations of training adaptations between blood markers and the physical fitness measures. Methodology. 25 professional male soccer players (28.1 ± 4.6 years old, 2.0 ± 7.8 kg, and 176.7 ± 4.9 cm) were assessed for hematological and biochemical parameters, and physical fitness measures in the baseline and after the phase of PS. Results Increases in platelets were observed after the PS phase (p = 0.001, η2 = 0.39). Regarding the biochemical parameters, significant increases between PS were found for creatinine (Cre) (p = 0.001, η2 = 0.66), alkaline phosphatase (ALP) (p = 0.001, η2 = 0.79), C-Reactive Protein (CRP) (p = 0.001, η2 = 0.74), cortisol (C) (p = 0.001, η2 = 0.63), and testosterone (T) (p = 0.001, η2 = 0.76), whereas significant decreases were found for albumin (Alb) (p = 0.004, η2 = 0.29), and calcium corrected (Ca Corr.) (p = 0.002, η2 = 0.32). Moderate correlations were found between albumin and the 5-meter linear sprint split (r = –0.44 (95%CI: –0.71; –0.05)) and CRP (r = –0.48 (95%CI: –0.74; –0.10)). Moderate correlations were found between VAMEVAL and hemoglobin (r = 0.44 (95%CI: 0.05; 0.71)). Conclusions The overall physical fitness measures improved after the PS phase. Also, significant variations (decreases/increases) were observed for the case of biomchemical and hematological outcomes. Coaches should carefully consider the adaptative changes observed in blood parameters as the changes in whole organism and metabolism after specific critical phases as the PS in professional players. Thus, optimal management of stimulus/recovery can be warranted to minimize illness and injury rate and to follow the direction and dynamics of adaptative changes.
Collapse
|
15
|
Fares MY, Stewart K, McBride M, Maclean J. Lower limb injuries in an english professional football club: injury analysis and recommendations for prevention. PHYSICIAN SPORTSMED 2022; 51:260-268. [PMID: 35191360 DOI: 10.1080/00913847.2022.2045176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Lower limb injuries constitute a problem in the sport of football. Our aim is to explore patterns and trends of lower limb injuries in an English professional football club. METHODS This is a descriptive epidemiological study. Reports provided by the club's physical therapy team were screened for injuries among professional football players sustained over four seasons, from 2015/2016 to 2018/2019. Data included setting of injury (in-match or training), anatomical location of injury, type of injury, number of days off and month of injury. RESULTS A total of 296 lower limb injuries were recorded in our study, with a rate of 11.14 per 1000 football hours. Injury rate during games was 51.38 per 1000 football hours, significantly greater than that during training at 3.81 per 1000 football hours (p = 0.021). The thigh was significantly the most commonly injured location at 4.67 per 1000 football hours (p < 0.001). Grade I tears were the most common injury type at 1.73 per 1000 football hours, significantly greater than grade III tears (p = 0.027), contusions (p = 0.043), fractures (p = 0.02), and lacerations (p = 0.019). Injury rates were found to be greatest during preseason and declined as season progressed. On average, an injury sidelined the affected footballer for a total of 20 days. CONCLUSION Lower limb injuries were more common during matches than training. The thigh is the most common injury location, and grade I muscle tear was the most common type of injury. Injury rates were higher early on in the season. Potential prevention strategies include spacing out competition, adopting training and exercise regimens that cater for recovery, and increasing research regarding injury mechanisms.
Collapse
Affiliation(s)
- Mohamad Y Fares
- College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Katy Stewart
- College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, Scotland, UK.,Hampden Sports Clinic, Glasgow, Scotland, UK
| | | | - John Maclean
- College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, Scotland, UK.,Hampden Sports Clinic, Glasgow, Scotland, UK.,Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland, UK
| |
Collapse
|
16
|
Nordstrøm A, Bahr R, Clarsen B, Talsnes O. Association Between Preseason Fitness Level and Risk of Injury or Illness in Male Elite Ice Hockey Players: A Prospective Cohort Study. Orthop J Sports Med 2022; 10:23259671221076849. [PMID: 35224120 PMCID: PMC8873563 DOI: 10.1177/23259671221076849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/12/2021] [Indexed: 12/03/2022] Open
Abstract
Background: Little is known about the association between physical fitness and the risk of injury or illness in ice hockey. The least-fit players may be more prone to injury and illness. Purpose: To examine the association between preseason fitness level and injury or illness risk among elite ice hockey players during the regular season. Study Design: Cohort study; Level of evidence, 2. Methods: A total of 133 male ice hockey players in the GET League (the premier professional league in Norway) completed 8 different exercises (40-m sprint, countermovement jump, 3000-m run, squat, bench press, chin-ups, brutal bench, and box jump) at the annual 1-day preseason testing combine. During the 2017-2018 competitive season, the players reported all health problems (acute injuries, overuse injuries, and illnesses) weekly (31 weeks) using the Oslo Sports Trauma Research Center Questionnaire on Health Problems. Results: Overall, the players reported 191 acute injuries, 82 overuse injuries, and 132 illnesses. The least-fit tercile of players did not report more health problems (mean, 3.0; 95% CI, 2.2-3.8) compared with the most-fit (mean, 3.4; 95% CI, 2.6-4.2) or the medium-fit (mean, 2.7; 95% CI, 1.9-3.5) players. The most-fit players reported more substantial health problems (mean, 2.0; 95% CI, 1.6-2.5) compared with the medium-fit (mean, 1.3; 95% CI, 0.8 -1.8) and least-fit (mean, 1.8; 95% CI, 1.3-2.3) (P = .02) players. There was no association between low physical fitness and number of health problems when comparing the least-fit tercile of the players with the rest of the cohort (P > .05); however, there was an association between low physical fitness and greater severity of all health problems when comparing the least-fit tercile of players to the rest of the cohort after adjusting for time on ice per game, playing position, and age (P = .02). Conclusion: Low physical fitness was not associated with increased rate of injury or illness but was associated with greater severity of all health problems after adjusting for time on ice per game, playing position, and age.
Collapse
Affiliation(s)
- Anine Nordstrøm
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
- Sykehuset Innlandet HF, Innlandet Hospital Trust, Elverum, Norway
| | - Roald Bahr
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
| | - Ben Clarsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
- Center for Disease Burden Norwegian Institute of Public Health, Bergen, Norway
| | - Ove Talsnes
- Sykehuset Innlandet HF, Innlandet Hospital Trust, Elverum, Norway
- University of Oslo, Oslo University Hospital, Oslo, Norway
| |
Collapse
|
17
|
The Hamstring and ACL Injury Incidence during a Season Is Not Directly Related to Preseason Knee Strength Ratios in Elite Male Soccer Players. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Background and Objectives: The aim of this study was to identify preseason isokinetic strength differences in the knee flexors and extensors and their ipsilateral/bilateral ratios and, furthermore, to compare the results among players who subsequently overcame a hamstring strain injury (HSI) or anterior cruciate ligament (ACL) rupture during the season and those who did not. Materials and Methods: A total of 134 professional soccer players underwent isokinetic strength assessment at a velocity of 60°·s−1 (knee flexors and extensors) for the dominant and non-dominant lower limb to determine preseason peak torque values and bilateral and ipsilateral strength ratios. Subsequently, the incidence of injuries during the season was recorded, and players were divided into groups according to ACL rupture injuries (n = 10), hamstring strains (n = 10), and a control group of non-injured players who were selected on a random basis (n = 20). A retrospective approach was used to analyze and compare the preseason strength characteristics and whether some variance among groups was relevant among the injured leg and non-injured leg groups. Results: The results of our study show that low-angular velocity preseason testing did not result in a player’s HSI or ACL injury during the season. The difference between the monitored groups ranged from 1.5% to 3%. The comparison showed low evidence for significant differences. Conclusions: An angular velocity of 60°·s−1 within concentric muscle contraction alone was not linked to subsequent injury of the hamstring or anterior cruciate ligament and acted as an insufficient factor of injury risk in adult professional soccer players.
Collapse
|
18
|
The Relationship Between Performance and Injury in Junior Australian Football Athletes. Int J Sports Physiol Perform 2022; 17:761-767. [DOI: 10.1123/ijspp.2021-0308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/16/2021] [Accepted: 10/27/2021] [Indexed: 11/18/2022]
Abstract
Purpose: Determine the impact of preseason and between-seasons changes in individual physical performance on injury risk in elite junior Australian football players and if injuries sustained during a season impact subsequent-season performance improvement. Methods: This prospective cohort study assessed individual performance measures (sprint speed, jump, agility, and aerobic endurance) during preseason over 4 consecutive seasons. Injury status (injured/not injured) was tracked weekly to determine the relationship between individual performance and in-season injury occurrence. Mixed models were used to determine the relationship between physical performance and injury, and the effect of injury on physical performance improvement. Results: A total of 206 players played 2 consecutive seasons and were included (17.6 y, 181.9 cm, 75.7 kg). Faster players during preseason experienced higher injury incidence (injuries/season) during that playing season (incidence rate ratio = 0.127; P = .034). Injury incidence was not influenced by between-seasons change in any performance measure. Players injured during their first season maintained their aerobic fitness, which declined in noninjured players (d = 0.39; P = .013). Players who sustained a lower-limb injury during their first season saw smaller improvements in sprint speed than players who did not get injured (d = 0.39; P = .035). Conclusion: Faster players experience higher injury incidence than slower players and may require specific prevention interventions. Players who experience a lower-limb injury during the playing season do not improve sprint speed between seasons to the same extent as players who do not get injured, highlighting the need for targeted high-speed running ability development as part of rehabilitation.
Collapse
|
19
|
Nascimento MM, Silva PR, Felício LR, Mainenti MR, Miranda HL, Paz GA, Lemos T, Ferreira ADS, Vigário PS. Postural control in football players with vision impairment: Effect of sports adaptation or visual input restriction? MOTRIZ: REVISTA DE EDUCACAO FISICA 2022. [DOI: 10.1590/s1980-657420220010821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
20
|
Variability of External Intensity Comparisons between Official and Friendly Soccer Matches in Professional Male Players. Healthcare (Basel) 2021; 9:healthcare9121708. [PMID: 34946434 PMCID: PMC8702108 DOI: 10.3390/healthcare9121708] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/29/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
The aims of this study were to compare the external intensity between official (OMs) and friendly matches (FMs), and between first and second halves in the Iranian Premier League. Twelve players participated in this study (age, 28.6 ± 2.7 years; height, 182.1 ± 8.6 cm; body mass, 75.3 ± 8.2 kg). External intensity was measured by total duration, total distance, average speed, high-speed running distance, sprint distance, maximal speed and body load. In general, there was higher intensity in OMs compared with FMs for all variables. The first half showed higher intensities than the second half, regardless of the type of the match. Specifically, OMs showed higher values for total sprint distance (p = 0.012, ES = 0.59) and maximal speed (p < 0.001, ES = 0.27) but lower value for body load (p = 0.038, ES = −0.42) compared to FMs. The first half of FMs only showed lower value for body load (p = 0.004, ES = −0.38) than FMs, while in the second half of OMs, only total distance showed a higher value than FMs (p = 0.013, ES = 0.96). OMs showed higher demands of high intensity, questioning the original assumption of FMs demands. Depending on the period of the season that FMs are applied, coaches may consider requesting higher demands from their teams.
Collapse
|
21
|
Neuromuscular and functional responses in professional soccer players during pre-season: implications for injury prevention. SPORT SCIENCES FOR HEALTH 2021. [DOI: 10.1007/s11332-021-00769-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
Clemente FM, González-Fernández FT, Ceylan HI, Silva R, Younesi S, Chen YS, Badicu G, Wolański P, Murawska-Ciałowicz E. Blood Biomarkers Variations across the Pre-Season and Interactions with Training Load: A Study in Professional Soccer Players. J Clin Med 2021; 10:5576. [PMID: 34884288 PMCID: PMC8658324 DOI: 10.3390/jcm10235576] [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] [Received: 10/03/2021] [Revised: 11/18/2021] [Accepted: 11/24/2021] [Indexed: 02/07/2023] Open
Abstract
Background: Pre-season training in soccer can induce changes in biological markers in the circulation. However, relationships between chosen hematological and biochemical blood parameters and training load have not been measured. Objective: Analyze the blood measures changes and their relationships with training loads changes after pre-season training. Methodology: Twenty-five professional soccer players were assessed by training load measures (derived from rate of perceived exertion- known as RPE) during the pre-season period. Additionally, blood samples were collected for hematological and biochemical analyses. Results: For hematological parameters, significant increases were found for platelets (PLT) (dif: 6.42; p = 0.006; d = -0.36), while significant decreases were found for absolute neutrophils count (ANC) (dif: -3.98; p = 0.006; d = 0.11), and absolute monocytes count (AMC) (dif: -16.98; p = 0.001; d = 0.78) after the pre-season period. For biochemical parameters, there were significant increases in creatinine (dif: 5.15; p = 0.001; d = -0.46), alkaline phosphatase (ALP) (dif: 12.55; p = 0.001; d = -0.84), C-reactive protein (CRP) (dif: 15.15; p = 0.001; d = -0.67), cortisol (dif: 2.85; p = 0.001; d = -0.28), and testosterone (dif: 5.38; p = 0.001; d = -0.52), whereas there were significant decreases in calcium (dif: -1.31; p = 0.007; d =0.49) and calcium corrected (dif: -2.18; p = 0.015; d = 0.82) after the pre-season period. Moreover, the Hooper Index (dif: 13.22; p = 0.01; d = 0.78), and all derived RPE measures increased after pre-season period. Moderate-to-very large positive and negative correlations (r range: 0.50-0.73) were found between the training load and hematological measures percentage of changes. Moderate-to-large positive and negative correlations (r range: 0.50-0.60) were found between training load and biochemical measures percentage of changes. Conclusions: The results indicated heavy physical loads during the pre-season, leading to a decrease in immune functions. Given the significant relationships between blood and training load measures, monitoring hematological and biochemical measures allow coaches to minimize injury risk, overreaching, and overtraining.
Collapse
Affiliation(s)
- 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
| | - Francisco Tomás González-Fernández
- Department of Physical Activity and Sport Sciences, Pontifical University of Comillas, 07013 Palma, Spain;
- SER Research Group, Pontifical University of Comillas, 07013 Palma, Spain
| | - Halil Ibrahim Ceylan
- Physical Education and Sports Teaching Department, Kazim Karabekir Faculty of Education, Ataturk University, Erzurum 25240, Turkey;
| | - Rui Silva
- 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;
| | - Saeid Younesi
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, 3004-531 Coimbra, Portugal;
| | - Yung-Sheng Chen
- Department of Exercise and Health Sciences, University of Taipei, Taipei 11153, Taiwan;
| | - Georgian Badicu
- Department of Physical Education and Special Motricity, University Transilvania of Brasov, 500068 Brasov, Romania;
| | - Paweł Wolański
- Department of Physiology, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland;
| | - Eugenia Murawska-Ciałowicz
- Department of Physiology and Biochemistry, University School of Physical Education, 51-612 Wrocław, Poland;
| |
Collapse
|
23
|
Orhant E, Chapellier JF, Carling C. Injury rates and patterns in French male professional soccer clubs: a comparison between a regular season and a season in the Covid-19 pandemic. Res Sports Med 2021:1-11. [PMID: 34706601 DOI: 10.1080/15438627.2021.1989434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This study investigated time-loss injury occurrence and patterns between the first season (2020/21, S2) completed during the Covid-19 pandemic (longer pre-season following cancellation of the 2019/20 season but shorter duration) and a regular season (2018/19, S1) in French Ligue 1 and 2 professional soccer clubs. Epidemiological data were prospectively recorded in a national injury database by each club's physician. In all clubs combined, the mean number of injuries per club was 31.5 and 36.6 in S2 and S1, respectively (-13.9%). Overall match injury incidence (per 1000 hours) in all clubs combined was lower in S2 versus S1 (22.23 vs 25.96, p < 0.01). In Ligue 1 clubs alone, match-play incidences for injury overall (24.92 vs 29.42), muscle strains (10.59 vs 13.24) and strains specifically in the hamstring region (4.52 vs 6.22) were lower in S2 versus S1 (all p < 0.05). No differences in the incidence of match injuries affecting the ankle and knee regions were observed. Changes in the 2020/21 season structure and duration owing to the Covid-19 pandemic seem not to have had a negative effect on injury occurrence and patterns in French professional soccer clubs.
Collapse
Affiliation(s)
- Emmanuel Orhant
- Medical Department, Fédération Française De Football, Paris, France
| | | | - Christopher Carling
- High Performance Department, Fédération Française De Football, Paris, France
| |
Collapse
|
24
|
Kobal R, Carvalho L, Abad CC, Faust B, Rossetti M, Saito T, Klosterhoff RR, De Souza EO, Barroso R. Pre-season in soccer: a paradox between a high volume of technical/tactical training and improvement in the neuromuscular performance of elite women soccer players. J Sports Med Phys Fitness 2021; 62:763-768. [PMID: 34028241 DOI: 10.23736/s0022-4707.21.12427-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND there is a paradox between the development of strength-power abilities and the high volume of technical/tactical training in elite soccer players during the pre-season. This concurrent effect between aerobic and neuromuscular training regimes induce impairment in power performance. METHODS this study aimed to investigate the effect of an equalized program of strength-power training (4-5 sessions/week) and soccer training (4-6 sessions/week) in power and aerobic performance during 8-weeks of pre-season in elite women soccer players. Vertical jumps [squat jump (SJ); countermovement jump (CMJ)] and Yo-Yo intermittent recovery level 1 test (YOYO-R1) were assessed pre- and post pre-season. A paired sample t-test was used to compare differences between pre and post pre-season (Δ%). The level of significance was established at p ≤ 0.05. RESULTS the women soccer players improved the SJ (p<0.001; Δ%=12), CMJ (p<0.001; Δ%=8.5), and YOYO-R1 (p<0.001; Δ% =28.5). There was a body recomposition observed, lower body fat (p = 0.004; Δ%=15), higher fat free mass (p = 0.001; Δ%=5). CONCLUSIONS our results demonstrated that it is possible to develop aerobic and power abilities of elite women soccer players during pre-season using an equalized ratio of soccer training and strength-power training schedules.
Collapse
Affiliation(s)
- Ronaldo Kobal
- School of Physical Education, University of Campinas, Campinas, Brazil - .,Sport Club Corinthians Paulista, São Paulo, Brazil -
| | - Leonardo Carvalho
- School of Physical Education, University of Campinas, Campinas, Brazil
| | - Cesar C Abad
- Faculty Lusofona of São Paulo, São Paulo, Brazil
| | - Bruno Faust
- Sport Club Corinthians Paulista, São Paulo, Brazil
| | | | - Tiemi Saito
- Sport Club Corinthians Paulista, São Paulo, Brazil
| | | | | | - Renato Barroso
- School of Physical Education, University of Campinas, Campinas, Brazil
| |
Collapse
|
25
|
Izzicupo P, Di Baldassarre A, Abelkalns I, Bisenieks U, Sánchez-Pato A, Cánovas-Alvarez FJ, Doupona M, Figueiredo AJ, García-Roca JA, Ghinassi B, Leiva-Arcas A, Meroño L, Paegle A, Radu LE, Rus CM, Rusu OM, Sarmento H, Stonis J, Vaquero-Cristóbal R, Vaz V, Capranica L. Dual Careers of Athletes During COVID-19 Lockdown. Front Psychol 2021; 12:657671. [PMID: 33868131 PMCID: PMC8047065 DOI: 10.3389/fpsyg.2021.657671] [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: 01/23/2021] [Accepted: 02/22/2021] [Indexed: 12/25/2022] Open
Abstract
This study aimed to investigate the student-athletes' capability to face the academic, sport, and social challenges during the coronavirus disease 2019 (COVID-19) lockdown and to disclose novel aspects of dual careers. A 32-item online survey encompassing demographic characteristics, sport and university engagement, support and dual-career benefits, physical activity, sitting time, and the time deemed necessary to recover the previous level of performance was developed. Four hundred sixty-seven student-athletes (males: 57%, females: 43%) from 11 countries, competing in 49 different sports (individual: 63.4%, team: 36.6%) at regional (17.5%), national (43.3%), and international (39.2%) levels, and enrolled at high school (21.9%) and university (78.1%) levels completed the survey. During the lockdown, the respondents decreased the time dedicated to sport and academics, although they maintained an active lifestyle. Student-athletes from countries under severe contagion were more likely to train at home, dedicate to academics, and receive support from the coach but less likely receive support from their teachers. With respect to their team sport counterparts, athletes competing in individual sports trained more and were more likely to receive support from their coaches. International athletes showed the highest training time and support from their coaches and as student-athletes. High school students received more support from their coaches and teachers, whereas university students were more likely considering dual careers useful to cope with the COVID-19 pandemic. This study substantiates the relevant role of competitive sports participation in the maintenance of active lifestyles, with student-athletes considering home training and e-learning valuable resources during the lockdown. Furthermore, their sport and academic commitments helped student-athletes cope with the emergency of the COVID-19 pandemic.
Collapse
Affiliation(s)
- Pascal Izzicupo
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Angela Di Baldassarre
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | | | | | - Antonio Sánchez-Pato
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | | | - Mojca Doupona
- Department of Sport Sociology and History, Faculty of Sports, University of Ljubljana, Ljubljana, Slovenia
- European Athlete as Student Network, Ghaxaq, Malta
| | - António J. Figueiredo
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Juan Alfonso García-Roca
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Barbara Ghinassi
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Alejandro Leiva-Arcas
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Lourdes Meroño
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | | | - Liliana-Elisabeta Radu
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Cristian-Mihail Rus
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Oana-Mihaela Rusu
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Hugo Sarmento
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | | | - Raquel Vaquero-Cristóbal
- Injury Prevention in Sport Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Vasco Vaz
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Laura Capranica
- European Athlete as Student Network, Ghaxaq, Malta
- Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Rome, Italy
| |
Collapse
|
26
|
Calleja-Gonzalez J, Lalín C, Cos F, Marques-Jimenez D, Alcaraz PE, Gómez-Díaz AJ, Freitas TT, Mielgo Ayuso J, Loturco I, Peirau X, Refoyo I, Terrados N, Sampaio JE. SOS to the Soccer World. Each Time the Preseason Games Are Less Friendly. Front Sports Act Living 2020; 2:559539. [PMID: 33367274 PMCID: PMC7750874 DOI: 10.3389/fspor.2020.559539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Affiliation(s)
- Julio Calleja-Gonzalez
- Department of Physical Education and Sports, Faculty of Education and Sport, University of the Basque Country, UPV/EHU, Vitoria, Spain
| | | | - Francesc Cos
- National Institute of Physical Education of Catalonia, University of Barcelona, Barcelona, Spain.,Manchester City Football Club, 1st Team, Manchester, United Kingdom
| | - Diego Marques-Jimenez
- Academy Department, Deportivo Alavés, Vitoria-Gasteiz, Spain.,Department of Health Sciences, Faculty of Health Sciences, Universitat Oberta de Catalonia, Barcelona, Spain
| | - Pedro E Alcaraz
- UCAM Research Center for High Performance Sport, Catholic University of Murcia (UCAM), Murcia, Spain.,Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain
| | | | - Tomás T Freitas
- UCAM Research Center for High Performance Sport, Catholic University of Murcia (UCAM), Murcia, Spain.,Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain.,Núcleo de Alto Rendimento Esportivo de São Paulo (NAR), São Paulo, Brazil
| | - Juan Mielgo Ayuso
- Department of Biochemistry Molecular Biology and Physiology, Faculty of Health Sciences, Campus de Soria, University of Valladolid, Soria, Spain
| | - Irineu Loturco
- Núcleo de Alto Rendimento Esportivo de São Paulo (NAR), São Paulo, Brazil
| | - Xavi Peirau
- National Institute of Physical Education of Catalonia, University of Lleida, Lleida, Spain
| | - Ignacio Refoyo
- Department of Sports, Faculty of Physical Activity and Sports Sciences (INEF), Universidad Politécnica de Madrid, Madrid, Spain
| | - Nicolas Terrados
- Departamento de Medicina Deportiva, Fundación Deportiva Municipal de Avilés (FDM), Aviles, Spain
| | - Jaime E Sampaio
- Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University of Trás-os-Montes and Alto Douro, UTAD, Vila Real, Portugal
| |
Collapse
|
27
|
Ekstrand J, Spreco A, Windt J, Khan KM. Are Elite Soccer Teams' Preseason Training Sessions Associated With Fewer In-Season Injuries? A 15-Year Analysis From the Union of European Football Associations (UEFA) Elite Club Injury Study. Am J Sports Med 2020; 48:723-729. [PMID: 31990574 DOI: 10.1177/0363546519899359] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Preseason training develops players' physical capacities and prepares them for the demands of the competitive season. In rugby, Australian football, and American football, preseason training may protect elite players against in-season injury. However, no study has evaluated this relationship at the team level in elite soccer. PURPOSE/HYPOTHESIS The aim of this study was to investigate whether the number of preseason training sessions completed by elite soccer teams was associated with team injury rates and player availability during the competitive season. It was hypothesized that elite soccer teams who participate in more preseason training will sustain fewer injuries during the competitive season. STUDY DESIGN Descriptive epidemiology study. METHODS We used the Union of European Football Associations (UEFA) injury dataset to analyze 44 teams for up to 15 seasons (total, 244 team-seasons). Separate linear regression models examined the association between the number of team preseason training sessions and 5 in-season injury measures. Injury-related problems per team were quantified by totals of the following: (1) injury burden, (2) severe injury incidence, (3) training attendance, (4) match availability, and (5) injury incidence. RESULTS Teams averaged 30 preseason training sessions (range, 10-51). A greater number of preseason training sessions was associated with less injury load during the competitive season in 4 out of 5 injury-related measures. Our linear regression models revealed that for every 10 additional preseason training sessions that the team performed, the in-season injury burden was 22 layoff days lower per 1000 hours (P = .002), the severe injury incidence was 0.18 severe injuries lower per 1000 hours (P = .015), the training attendance was 1.4 percentage points greater (P = .014), and the match availability was 1.0 percentage points greater (P = .042). As model fits were relatively low (adjusted R2 = 1.3%-3.2%), several factors that contribute to in-season injury outcomes were unaccounted for. CONCLUSION Teams that performed a greater number of preseason training sessions had "healthier" in-season periods. Many other factors also contribute to in-season injury rates. Understanding the benefit of preseason training on in-season injury patterns may inform sport teams' planning and preparation.
Collapse
Affiliation(s)
- Jan Ekstrand
- Division of Community Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.,Football Research Group, Linköping, Sweden.,Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - Armin Spreco
- Football Research Group, Linköping, Sweden.,Region Östergötland, Center for Health Services Development, Linköping, Sweden
| | - Johann Windt
- Football Research Group, Linköping, Sweden.,United States Olympic Committee, Colorado Springs, Colorado, USA.,United States Coalition for the Prevention of Illness and Injury in Sport, Colorado Springs, Colorado, USA
| | - Karim M Khan
- Football Research Group, Linköping, Sweden.,Department of Family Practice, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
28
|
Curtis RM, Huggins RA, Benjamin CL, Sekiguchi Y, Adams WM, Arent SM, Jain R, Miller SJ, Walker AJ, Casa DJ. Contextual Factors Influencing External and Internal Training Loads in Collegiate Men's Soccer. J Strength Cond Res 2019; 34:374-381. [PMID: 31524781 DOI: 10.1519/jsc.0000000000003361] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Curtis, RM, Huggins, RA, Benjamin, CL, Sekiguchi, Y, Adams, WM, Arent, SM, Jain, R, Miller, SJ, Walker, AJ, and Casa, DJ. Contextual factors influencing external and internal training loads in collegiate men's soccer. J Strength Cond Res 34(2): 374-381, 2020-This study investigated factors influencing training loads (TL) in collegiate men's soccer. Total distance, high-speed running distance (>14.4 km·h), high-intensity heart-rate zone duration (HI HRZ, >70% heart rate relative to maximum), and session rating of perceived exertion were assessed daily from 107 male soccer players competing for 5 National Collegiate Athletics Association Division I teams. Differences between athlete role (starter and reserve), position (defender, midfielder, and forward), season phase (preseason, in-season, and postseason), days relative to match (MD-1 to MD-5+), days between matches (<4, 4-5, >5 days), previous match outcome (win, loss, and draw), and upcoming opponent relative ranking (weaker, trivial, and stronger) were examined. Mean differences (MD) and effect sizes (ESs) with 90% confidence intervals were reported. There were trivial and insignificant differences by player role, position, or upcoming opponent strength, and small-moderate increases in preseason TL compared with in-season (ES [range] = 0.4-0.9). TLs were lower for MD-1 and higher for MD-5+ (ES [range] = 0.4-1.3) when compared with MD-2-4. External loads (ES = -0.40 ± 0.20) were less after wins compared with losses. TLs are increased in the preseason, when training sessions occur greater than 5 days from a match and after losses. Contextualizing factors affecting TLs has implications for developing workload prescription and recovery strategies.
Collapse
Affiliation(s)
- Ryan M Curtis
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, Connecticut
| | - Robert A Huggins
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, Connecticut
| | - Courteney L Benjamin
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, Connecticut
| | - Yasuki Sekiguchi
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, Connecticut
| | - William M Adams
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina
| | - Shawn M Arent
- IFNH Center for Health and Human Performance, Rutgers University, New Brunswick, New Jersey.,Department of Exercise Science, University of South Carolina, Columbia, South Carolina
| | - Rajat Jain
- Department of Athletics, Northwestern University, Evanston, Illinois; and
| | - Sayers J Miller
- Department of Kinesiology, The Pennsylvania State University, State College, Pennsylvania
| | - Alan J Walker
- IFNH Center for Health and Human Performance, Rutgers University, New Brunswick, New Jersey
| | - Douglas J Casa
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, Connecticut
| |
Collapse
|
29
|
Coppalle S, Rave G, Ben Abderrahman A, Ali A, Salhi I, Zouita S, Zouita A, Brughelli M, Granacher U, Zouhal H. Relationship of Pre-season Training Load With In-Season Biochemical Markers, Injuries and Performance in Professional Soccer Players. Front Physiol 2019; 10:409. [PMID: 31031638 PMCID: PMC6474299 DOI: 10.3389/fphys.2019.00409] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 03/26/2019] [Indexed: 11/15/2022] Open
Abstract
INTRODUCTION There is controversy in the literature in regards of the link between training load and injury rate. Thus, the aims of this non-interventional study were to evaluate relationships between pre-season training load with biochemical markers, injury incidence and performance during the first month of the competitive period in professional soccer players. MATERIALS AND METHODS Healthy professional soccer players were enrolled in this study over two pre-season periods. Data sets were available from 26 players during the first season (2014-2015) and 24 players during the second season (2015-2016) who completed two pre-season periods (6 weeks each). External training load was assessed from all athletes during training using Global Positioning System (GPS). Internal training load was monitored after each training session using rate of perceived exertion (RPE). Before and after each pre-season, blood samples were taken to determine plasma lactate dehydrogenase (LDH), creatine kinase (CK) and C-reactive protein (CRP). Injury incidence and overall performance (ranking of the team after the first five official games of the championship) were recorded for both seasons separately. RESULTS There was no statistically significant difference in mean RPE values of the two-preparation periods (2737 ± 452 and 2629 ± 786 AU, p = 0.492). The correlational analysis did not reveal significant associations between internal and external training load (RPE and GPS data) and biological markers. There was a significant positive correlation between RPE and LDH during the 2015/2016 season (r = 0.974, p = 0.001). In addition, a significant negative correlation was found between total distance >20 km/h and CRP during the 2015-2016 season (r = -0.863, p = 0.027). The injury rates for the two seasons were 1.76 and 1.06 per 1000 h exposure for the 2014-2015 and 2015-2016 seasons, respectively (p = 0.127). CONCLUSION Our study showed that pre-season training load is not associated with overall team performance. This association is most likely multifactorial and other factors (e.g., technical and tactical level of the team, opponents, environment) may play an important role for the collective team performance. Our findings may help coaches to better prepare their athletes during pre-season.
Collapse
Affiliation(s)
- Sullivan Coppalle
- M2S (Movement, Sport and Health Sciences Laboratory), University of Rennes 2, Rennes, France
| | - Guillaume Rave
- Stade Lavallois Mayenne Football Club, Laval, France
- Department of Performance, Université d’Angers, Angers, France
| | | | - Ajmol Ali
- School of Sport, Exercise and Nutrition, Massey University, Auckland, New Zealand
| | - Iyed Salhi
- ISSEP Ksar Said, University of Manouba, Manouba, Tunisia
| | - Sghaier Zouita
- ISSEP Ksar Said, University of Manouba, Manouba, Tunisia
| | - Amira Zouita
- ISSEP Ksar Said, University of Manouba, Manouba, Tunisia
| | - Matt Brughelli
- Sports Performance Research Institute New Zealand, AUT Millennium, Auckland University of Technology, Auckland, New Zealand
| | - Urs Granacher
- Division of Training and Movement Sciences, University of Potsdam, Potsdam, Germany
| | - Hassane Zouhal
- M2S (Movement, Sport and Health Sciences Laboratory), University of Rennes 2, Rennes, France
| |
Collapse
|