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Canet-Vintró M, Rodríguez-Sanz J, López-de-Celis C, Campañá-Arnal E, Hidalgo-Garcia C, Pérez-Bellmunt A. Effects of focal vibration on changes in sports performance in amateur athletes: A randomized clinical trial. J Orthop Res 2024; 42:2106-2115. [PMID: 38598304 DOI: 10.1002/jor.25857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/06/2024] [Accepted: 03/30/2024] [Indexed: 04/12/2024]
Abstract
The aim of this study was to evaluate the effectiveness of a focal vibration protocol added to an activation protocol with active muscle contractions and to see what repercussions it has on sprint, countermovement jump (CMJ), and lower limb isometric strength. A double-blind randomized clinical trial was conducted in the Functional Anatomy Laboratory and the sample consisted of 70 athletes. The main outcome measures were knee extension force, CMJ, sprint, and surface electromyography. Repeated-measures analysis of variance revealed significant improvements. They were found in the within-group analysis for the Experimental Group in the isometric extension force (p < 0.001; η2 = 0.368), CMJ (p < 0.001; η2 = 0.301) and 30 m sprint (p < 0.001; η2 = 0.376). In the electromyography, there are changes in the Sham Group in all muscles, in CMJ and Sprint tests, and no differences in the Experimental Group, except for the RF muscle. In the between-group analysis, statistically significant differences were found only in favor of the Experimental Group in CMJ (p = 0.017; η2 = 0.81) and 30 m sprint (p < 0.001; η2 = 0.152). These results confirm a significant improvement in the sprint, CMJ performance, and quadriceps strength, after a focal vibration protocol, added to a muscle active contraction, compared to a focal vibration sham protocol. Therefore, our results suggest that the focal vibration can be a very useful tool in sports involving high-powered actions.
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Affiliation(s)
- Max Canet-Vintró
- Faculty of Medicine and Health Sciences, Basic Sciences and Physiotherapy Department, Universitat Internacional de Catalunya, Barcelona, Spain
- ACTIUM Anatomy Group, Barcelona, Spain
| | - Jacobo Rodríguez-Sanz
- Faculty of Medicine and Health Sciences, Basic Sciences and Physiotherapy Department, Universitat Internacional de Catalunya, Barcelona, Spain
- ACTIUM Anatomy Group, Barcelona, Spain
| | - Carlos López-de-Celis
- Faculty of Medicine and Health Sciences, Basic Sciences and Physiotherapy Department, Universitat Internacional de Catalunya, Barcelona, Spain
- ACTIUM Anatomy Group, Barcelona, Spain
- Fundació Institut Universitari per a la recerca a l'Atenció Primària de Salut Jordi Gol i Gurina, Barcelona, Spain
| | - Enric Campañá-Arnal
- Faculty of Medicine and Health Sciences, Basic Sciences and Physiotherapy Department, Universitat Internacional de Catalunya, Barcelona, Spain
- ACTIUM Anatomy Group, Barcelona, Spain
| | - César Hidalgo-Garcia
- Faculty of Health Sciences, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain
| | - Albert Pérez-Bellmunt
- Faculty of Medicine and Health Sciences, Basic Sciences and Physiotherapy Department, Universitat Internacional de Catalunya, Barcelona, Spain
- ACTIUM Anatomy Group, Barcelona, Spain
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Vigh-Larsen JF, Junge N, Cialdella-Kam L, Tomás R, Young L, Krustrup P, Mohr M, Nybo L. Testing in Intermittent Sports-Importance for Training and Performance Optimization in Adult Athletes. Med Sci Sports Exerc 2024; 56:1505-1537. [PMID: 39004796 DOI: 10.1249/mss.0000000000003442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
ABSTRACT Performance in intermittent sports relies on the interplay between multiple physiological systems determining the capacity to perform short explosive efforts as well as repeated intense actions with limited recovery over the course of an entire game. Testing should reflect these demands to allow for sport- and position-specific capacity analyses that eventually may translate into optimized training and improved performance. This may include individual load management and optimized training prescription, intensity targeting for specific positions or individual athletes, as well as benchmarking for monitoring of training progression and enhanced engagement of athletes. This review provides an overview of available tests in different exercise domains identified as relevant (from assessment of single explosive actions to intermittent endurance capacity), forming the basis for recommendations on how to compose a comprehensive yet feasible test battery that may be integrated into the seasonal competition and training plan. The test procedures should cover the performance spectrum of relevance for the individual athlete-also in team sports to account for positional differences. We emphasize the benefits of sport-specific tests, highlight parameters of importance for test standardization, and discuss how the applied test battery may be supplemented with secondary tests directed toward specific energy systems to allow for more in-depth analyses when required (e.g., in terms of an underperforming athlete). The synergy between testing and tracking of match performance (utilizing time-motion or global positioning systems) is highlighted, and although tracking cannot substitute for testing, combining the tools may provide a comprehensive overview of the physiological demands and performance during competition contextualized to the athletes' maximal exercise capacity.
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Affiliation(s)
| | - Nicklas Junge
- Department of Nutrition, Exercise and Sport Sciences, University of Copenhagen, Copenhagen, DENMARK
| | - Lynn Cialdella-Kam
- Warfighter Performance Department, Naval Health Research Center, San Diego, CA
| | - Rita Tomás
- Portugal Football School, Federação Portuguesa de Futebol Avenida das Seleções, Oeiras, PORTUGAL
| | - Laura Young
- American College of Sports Medicine, Indianapolis, IN
| | | | | | - Lars Nybo
- Department of Nutrition, Exercise and Sport Sciences, University of Copenhagen, Copenhagen, DENMARK
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Achenbach L, Zinner C, Zeman F, Obinger M. Cardiorespiratory Markers Relate to Change-of-Direction Performance During Incremental Endurance Tests and Friendly Matches in Professional Male Handball Players. Int J Sports Physiol Perform 2024; 19:773-779. [PMID: 38834181 DOI: 10.1123/ijspp.2023-0401] [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: 11/08/2023] [Revised: 04/13/2024] [Accepted: 04/14/2024] [Indexed: 06/06/2024]
Abstract
PURPOSE To compare the standard Yo-Yo intermittent recovery (IR) test and an agility Yo-Yo IR test with a higher number of change-of-direction movements to cardiorespiratory match performance. METHODS The study included 11 professional male handball players (age 24.5 [4.6] y) of a German second-league team. The performance parameters of the players of the seasons 2016-17 to 2018-19 were analyzed. The Yo-Yo IR test was compared to a Yo-Yo IR test with multiple multidirectional changes of direction in response to visual stimuli, which was conducted on a SpeedCourt (Yo-Yo SC IR). Peak oxygen uptake (VO2peak) and maximum heart rate (HRmax) were measured. Between-methods differences of individual athletes were quantified with Bland-Altman plots. RESULTS HRmax was not statistically different during the Yo-Yo SC IR test compared to the Yo-Yo IR test (181 [10] vs 188 [8] beats·min-1; P = .16). Agreement between the 2 tests was moderate for HRmax and good for heart rates >180 beats·min-1. Mean average VO2peak was 51.7 (3.9) and 50.9 (2.8) mL·min-1·kg-1 for the Yo-Yo SC IR test and the Yo-Yo IR test (P = .693), respectively. CONCLUSIONS A Yo-Yo test with multidirectional changes of direction in response to visual stimuli yielded good agreement with the frequently used linear running tests and can be used to assess players' VO2peak. The HRmax achieved during this test should be used with caution.
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Affiliation(s)
- Leonard Achenbach
- Department of Orthopedics, König-Ludwig-Haus, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Christoph Zinner
- Department of Sport, University of Applied Sciences for Police and Administration of Hesse, Wiesbaden, Germany
| | - Florian Zeman
- Center for Clinical Studies, University Medical Center Regensburg, Regensburg, Germany
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Skratek J, Kadlubowski B, Keiner M. The Effect of Traditional Strength Training on Sprint and Jump Performance in 12- to 15-Year-Old Elite Soccer Players: A 12-Month Controlled Trial. J Strength Cond Res 2024:00124278-990000000-00490. [PMID: 39074195 DOI: 10.1519/jsc.0000000000004890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
ABSTRACT Skratek, J, Kadlubowski, B, and Keiner, M. The effect of traditional strength training on sprint and jump performance in 12- to 15-year-old elite soccer players: a 12-month controlled trial. J Strength Cond Res XX(X): 000-000, 2024-The aim of the study was to evaluate the effect of traditional strength training on maximum strength (1 repetition maximum in front squat [FS] and back squat [BS]), jump (squat and countermovement jump), and linear sprint (LS) performance (5, 10, and 30 m) in elite young soccer players. A 12-month longitudinal design was chosen, and 48 elite male youth soccer players (age: 12-15 years) were included. The subjects were divided in 2 groups (a strength training group [STG] and a control group [CG]). The intervention group trained for 1 year over a competitive soccer season with additional sessions to their regular soccer practice (4 sessions per week), while the CG did not complete any additional sessions to the regular soccer training (4 sessions per week). The additional strength training (2 sessions per week [each approximately 30 minutes]) consisted of either parallel FS or BS. The squat variants switched in each session. Data were analyzed using a 2 × 3 (group × time) repeated-measures analysis of variance. The main findings of this study were that the STG resulted in significant pretest and post-test improvements in maximum strength (d = 3.75-5.58), jump (d = 0.84-1.14), and LS performance (d = -0.25 to 0.44), while for the CG, smaller increases or performance decreases were measured (maximum strength: d = 1.64-2.7; jump: d = 0.12-0.31; sprint: d = 0.00-025). A significant interaction effect in all variables indicated significant (p < 0.05) stronger performance improvements compared with the CG. Traditional strength training in elite youth soccer players is recommended to increase strength and speed-strength (jump and sprint performance) and should be considered in long-term athletic development programs.
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Affiliation(s)
- Josua Skratek
- Department of Exercise Science, German University of Health and Sport, Ismaning, Germany; and
- Department of Elite Youth Soccer, DSC Arminia Bielefeld, Bielefeld, Germany
| | - Björn Kadlubowski
- Department of Exercise Science, German University of Health and Sport, Ismaning, Germany; and
- Department of Elite Soccer, VfL Bochum, Bochum, Germany
| | - Michael Keiner
- Department of Exercise Science, German University of Health and Sport, Ismaning, Germany; and
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Bastiere J, Lussiana T, Young D, Gindre C, Mourot L. Persistence and activity levels of primitive reflexes in young high-level football players. Front Sports Act Living 2024; 6:1409257. [PMID: 39086851 PMCID: PMC11288865 DOI: 10.3389/fspor.2024.1409257] [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: 03/29/2024] [Accepted: 06/27/2024] [Indexed: 08/02/2024] Open
Abstract
Introduction Primitive reflexes (PR) induce involuntary automatic movements in response to specific stimuli. This study aimed to determine the prevalence of active PR in young high-level football players. Methodology Sixty-nine national-level football players from a French academy were tested (17.0 ± 1.4 years; 69.6 ± 8.0 kg; 178.9 ± 6.9 cm) to evaluate the persistence of PR, following the methodology of the Institute for Neuro-Physiological Psychology (INPP) and the classification by a global score (GS). Based on the sum of seven tests, each was rated between 0 = null and 4 = max. The GS is classified into five categories from no activity to maximal (0-1 = no activity, 2-7 = low, 8-13 = medium, 14-21 = high, and 22-28 = maximal). Result Around two-thirds (68.1%) of players presented active PR at different activity levels. Among them, a small proportion (7.2%) had medium GS, while 60.9% had a low GS. The GS was not dependent on field position or the age of the players (p > 0.05). However, playing football in an age category higher than their own was associated with significantly more active primitive reflexes (PR) compared to being in their age category (p < 0.01). The results showed that 72.7% of "upgraded" football players had low GS and 18.2% had medium GS, compared to 55.3% and 2.1% in the non-upgraded group. Discussion The findings of the current study demonstrate that PR could still be active in a healthy population of high-level football players. Practicing a single sport for years and upgrading players could create a negative environment that can ultimately lead to the activation of otherwise integrated PR.
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Affiliation(s)
- Julie Bastiere
- SYNERGIES, Université de Franche-Comté, Besançon, France
- Plateforme Exercice Performance Santé Innovation, Université de Franche-Comté, Besançon, France
- ESTAC Association, 5 rue Marie Curie, Troyes, France
| | - Thibault Lussiana
- SYNERGIES, Université de Franche-Comté, Besançon, France
- Plateforme Exercice Performance Santé Innovation, Université de Franche-Comté, Besançon, France
- Research and Development Department, Volodalen, Chavéria, France
- Research and Development Department, Volodalen SwissSportLab, Aigle, Switzerland
| | - Damien Young
- Technology University of the Shannon, Midlands Midwest, Thurles Campus, Tipperary, Ireland
| | - Cyrille Gindre
- SYNERGIES, Université de Franche-Comté, Besançon, France
- Plateforme Exercice Performance Santé Innovation, Université de Franche-Comté, Besançon, France
- Research and Development Department, Volodalen, Chavéria, France
- Research and Development Department, Volodalen SwissSportLab, Aigle, Switzerland
| | - Laurent Mourot
- SYNERGIES, Université de Franche-Comté, Besançon, France
- Plateforme Exercice Performance Santé Innovation, Université de Franche-Comté, Besançon, France
- Department of Biological Sciences, Faculty of Science, Thompson Rivers University, Kamloops, BC, Canada
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de Almeida KY, Zempo H, Saito M, Cetolin T, dos Santos Guimarães R, Marrero AR, Aguiar AS, Kikuchi N. Influence of ACTN3 R577X Polymorphism on Blood Creatine Kinase Levels Relative to Number of Sprints in Brazilian Professional Soccer Players. Genes (Basel) 2024; 15:896. [PMID: 39062675 PMCID: PMC11276463 DOI: 10.3390/genes15070896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 07/02/2024] [Accepted: 07/05/2024] [Indexed: 07/28/2024] Open
Abstract
This study sought to assess how post-game creatine kinase (CK) levels correlate with the number of sprints and the impact of the ACTN3 polymorphism on this response. This research constituted a descriptive/observational, retrospective cross-sectional study. DNA was extracted from blood samples for ACTN3 polymorphism genotyping. CK was measured 48 h after official matches, and the number of sprints (>19 km/h) was tracked using Global Positioning System (GPS) technology. The main cohort included 23 professional soccer players from the top tier of the Brazilian Championship. We analyzed 115 GPS + CK data sets. The replication cohort comprised 18 professional soccer players from the First Division of the Championship, had the same methodology applied, and featured a total of 90 GPS (sprints > 25.2 km/h) + CK data sets. For the main cohort, a significant positive correlation was seen between the number of sprints and the CK levels (p = 0.009). Athletes with the ACTN3 RR genotype had higher CK levels as more sprints were performed during the match (p = 0.017). However, the relationship was not found for X allele carriers (p > 0.05). For the replication cohort, there was a near-significant correlation between CK levels and the number of sprints (p = 0.05), and RR individuals showed a significant association (p = 0.01), whereas X allele carriers did not (p = 0.06). A greater number of sprints during matches is linked to higher CK levels, primarily among players with the ACTN3 RR genotype, which is potentially due to an increased presence of type II muscle fibers. These findings were replicated for both cohorts of elite Brazilian soccer players, emphasizing the importance of genetic factors in injury prevention.
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Affiliation(s)
- Kathleen Y. de Almeida
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo 158-8085, Japan; (K.Y.d.A.); (M.S.)
| | - Hirofumi Zempo
- Faculty of Health and Nutrition, Tokyo Seiei College, Tokyo 124-8530, Japan;
| | - Mika Saito
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo 158-8085, Japan; (K.Y.d.A.); (M.S.)
| | - Tiago Cetolin
- Graduate Program in Biochemistry, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil; (T.C.)
| | | | - Andrea Rita Marrero
- Graduate Program in Cell and Developmental Biology, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil;
| | - Aderbal S. Aguiar
- Graduate Program in Biochemistry, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil; (T.C.)
| | - Naoki Kikuchi
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo 158-8085, Japan; (K.Y.d.A.); (M.S.)
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Perna P, de Keijzer KL, Beato M. Flywheel resistance training in football: a useful rehabilitation tool for practitioners. Front Sports Act Living 2024; 6:1434995. [PMID: 39036368 PMCID: PMC11257893 DOI: 10.3389/fspor.2024.1434995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Accepted: 06/12/2024] [Indexed: 07/23/2024] Open
Affiliation(s)
- Paolo Perna
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
- Medical Department, Chelsea Football Club, London, United Kingdom
| | - Kevin L. de Keijzer
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Marco Beato
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
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Hansen MT, Rømer T, Lange KK, Dela F, Helge JW. Accuracy of a non-exercise method using seismocardiography for the estimation of V̇O 2peak in sub-elite football players. Eur J Sport Sci 2024; 24:889-898. [PMID: 38956783 PMCID: PMC11235662 DOI: 10.1002/ejsc.12147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 05/07/2024] [Accepted: 05/17/2024] [Indexed: 07/04/2024]
Abstract
A non-exercise method equation using seismocardiography for estimating V̇O2peak (SCG V̇O2peak) has previously been validated in healthy subjects. However, the performance of the SCG V̇O2peak within a trained population is unknown, and the ability of the model to detect changes over time is not well elucidated. Forty-seven sub-elite football players were tested at the start of pre-season (SPS) and 36 players completed a test after eight weeks at the end of the pre-season (EPS). Testing included an SCG V̇O2peak estimation at rest and a graded cardiopulmonary exercise test (CPET) on a treadmill for determination of V̇O2peak. Agreement between SCG V̇O2peak and CPET V̇O2peak showed a large underestimation at SPS (bias ± 95% CI: -9.9 ± 1.8, 95% Limits of Agreement: 2.2 to -22.0 mL·min-1 kg-1). At EPS no interaction (p = 0.3590) but a main effect of time (p < 0.0001) and methods (p < 0.0001) was observed between SCG and CPET V̇O2peak. No correlation in V̇O2peak changes was observed between SCG and CPET (r = -20.0, p = 0.2484) but a fair agreement in classifying the correct directional change in V̇O2peak with the SCG method was found (Cohen's κ coefficient = 0.28 ± 0.25). Overall, the SCG V̇O2peak method lacks accuracy and despite being able to estimate group changes, it was incapable of detecting individual changes in V̇O2peak following a pre-season period in sub-elite football players. The SCG algorithm needs to be further adjusted and the accuracy and precision improved for the method to be applicable for use within a trained population.
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Affiliation(s)
- Mikkel Thunestvedt Hansen
- XlabDepartment of Biomedical SciencesFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Tue Rømer
- XlabDepartment of Biomedical SciencesFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Kristine Kjær Lange
- XlabDepartment of Biomedical SciencesFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Flemming Dela
- XlabDepartment of Biomedical SciencesFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
- Department of GeriatricsBispebjerg University HospitalCopenhagenDenmark
- Department of Human Physiology and BiochemistryRiga Stradiņš UniversityRigaLatvia
| | - Jørn Wulff Helge
- XlabDepartment of Biomedical SciencesFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
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Chen L, Yan R, Xie L, Zhang Z, Zhang W, Wang H. Maturation-specific enhancements in lower extremity explosive strength following plyometric training in adolescent soccer players: A systematic review and meta-analysis. Heliyon 2024; 10:e33063. [PMID: 38994103 PMCID: PMC11238047 DOI: 10.1016/j.heliyon.2024.e33063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 07/13/2024] Open
Abstract
Background For adolescent soccer players, good sprinting and jumping abilities are crucial for their athletic performance. The application of plyometric training on boosting explosive strength in adolescent soccer players is contingent upon the maturation phase, which can mediate the training-induced adaptations. Purpose This systematic review and meta-analysis aim to explore the maturation effect of plyometric training on the lower limb explosive power of adolescent soccer players, with vertical countermovement jump (CMJ) and 20-m sprint as the main outcome indicators. Methods An extensive search of the literature was carried out on various databases including PubMed, Web of Science, Scopus, ProQuest, and the China National Knowledge Infrastructure (CNKI), covering the time period from the establishment of each database to February 6, 2023. The search was conducted using English keywords such as 'Plyometric,' 'Adolescent,' 'football,' and 'Explosive strength.' This study utilized the Cochrane risk of bias assessment tool to conduct a standardized quality evaluation of all the included literature. Additionally, the Review Manager 5.4 software was employed to perform data analysis on all the extracted data. Results A total of 17 studies involving 681 adolescent soccer players aged 10 to 19 were included. Plyometric training significantly improved CMJ performance across different maturation stages, especially in the post-peak height velocity stage (POST-PHV) [MD = 4.35, 95 % CI (2.11, 6.59), P < 0.01, I2 = 60 %]. The pre-peak height velocity stage (PRE-PHV) showed the next best improvement [MD = 3.00, 95 % CI (1.63, 4.37)], while the middle-peak height velocity stage (MID-PHV) showed the least improvement [MD = 2.79, 95 % CI (1.16, 4.41), P < 0.01, I2 = 49 %]. However, improvements in 20 m sprint ability were only observed in the PRE-PHV [MD = -0.06, 95 % CI (-0.12, 0), P < 0.01, I2 = 0 %] and MID-PHV [MD = -0.18, 95 % CI (-0.27, -0.08), P < 0.01, I2 = 0 %] stages. Conclusion Plyometric training serves as a potent strategy for boosting the lower limb explosive strength of adolescent soccer players, and the training effect is closely related to the players' biological maturity. Considering biological maturity is a key aspect that this study deems essential for the formulation of effective training programs for these adolescent players.
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Affiliation(s)
- Lunxin Chen
- Digitalized Strength and Conditioning Training Laboratory, Guangzhou Sport University, Guangzhou, China
| | - Ruixiang Yan
- Digitalized Strength and Conditioning Training Laboratory, Guangzhou Sport University, Guangzhou, China
| | - Lin Xie
- Digitalized Strength and Conditioning Training Laboratory, Guangzhou Sport University, Guangzhou, China
| | - Zhiyong Zhang
- Digitalized Strength and Conditioning Training Laboratory, Guangzhou Sport University, Guangzhou, China
| | - Wenfeng Zhang
- School of Athletic Training, Guangzhou Sport University, Guangzhou, China
| | - Hengtong Wang
- School of Athletic Training, Guangzhou Sport University, Guangzhou, China
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Robles-Palazón FJ, McMahon JJ, Ayala F, Comfort P. Things to keep in mind when selecting physical assessments in youth soccer: Correlations between test performances, interlimb asymmetries, and effects of maturation. PLoS One 2024; 19:e0305570. [PMID: 38905234 PMCID: PMC11192305 DOI: 10.1371/journal.pone.0305570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 05/31/2024] [Indexed: 06/23/2024] Open
Abstract
A range of field-based tests have been proposed for inclusion in physical performance assessment batteries. However, there are obvious time and human resources constraints in applied settings. The knowledge of potential relationships between tests on performance, asymmetries, as well as maturation-induced changes, may help select the most informative and least time-consuming testing battery. The purposes of this study were: (1) to determine correlations in performance between different field-based tests, in interlimb asymmetry between those unilateral tests, and between asymmetry scores and test performances, and (2) to determine the influence of players' maturity status on test performances and asymmetries. A total of 309 male youth soccer players completed a nine-test battery including y-balance test, drop vertical jump, countermovement jump, single leg countermovement jump, standing long jump, single leg hop for distance, Illinois agility test, 10 m sprint, and 20 m sprint. The results revealed moderate-to-very large relationships between jump, sprint, and agility performances (r = 0.43-0.94), but weak-to-moderate correlations between these tests and balance scores (r ≤ 0.38). No relevant relationship (r ≤ 0.32) for asymmetries detected through different unilateral tests was found, nor between asymmetries and performance scores (r < 0.29). While maturity status clearly influenced players' performance, a limited impact on asymmetries was evident. Despite the mentioned relationships, the low shared variance between tests indicates that they should not be used interchangeably, and coaches should select those with the greatest specificity for the sport. Asymmetries do not influence performance, but their prevalence and unchanging nature with maturation can be seen as an opportunity for the identification of highly asymmetrical players and the application of interventions to improve the weaker limb, irrespective of the athlete's stage of development. To this end, the single leg countermovement jump might be viewed as an appropriate test in male youth soccer.
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Affiliation(s)
- Francisco Javier Robles-Palazón
- Department of Physical Activity and Sport, Faculty of Sport Sciences, Campus of Excellence Mare Nostrum, University of Murcia, Murcia, Spain
- Centre for Human Movement and Rehabilitation, University of Salford, Salford, United Kingdom
| | - John J. McMahon
- Centre for Human Movement and Rehabilitation, University of Salford, Salford, United Kingdom
| | - Francisco Ayala
- Department of Physical Activity and Sport, Faculty of Sport Sciences, Campus of Excellence Mare Nostrum, University of Murcia, Murcia, Spain
- School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom
| | - Paul Comfort
- Centre for Human Movement and Rehabilitation, University of Salford, Salford, United Kingdom
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
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Beato M, Bishop CJ, Turner AN. Editorial: Strength and conditioning in football: driving physical performance through research and innovation. Front Physiol 2024; 15:1437251. [PMID: 38903910 PMCID: PMC11187705 DOI: 10.3389/fphys.2024.1437251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 05/29/2024] [Indexed: 06/22/2024] Open
Affiliation(s)
- Marco Beato
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Chris J. Bishop
- Faculty of Science and Technology, London Sport Institute, Middlesex University, London, United Kingdom
| | - Anthony N. Turner
- Faculty of Science and Technology, London Sport Institute, Middlesex University, London, United Kingdom
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Zhou Y, Tai F, Yu S. Effect of 12-week SPARQ training on the ability of youth football players. SPORTVERLETZUNG SPORTSCHADEN : ORGAN DER GESELLSCHAFT FUR ORTHOPADISCH-TRAUMATOLOGISCHE SPORTMEDIZIN 2024; 38:64-72. [PMID: 38471537 DOI: 10.1055/a-2250-6941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
AIM To evaluate the effect of a 12-week physical training regime comprising five components - speed, power, agility, reaction, quickness - on young football players' performance in terms of their capacity to move quickly in different phases. METHODS The football players were randomly divided into an experimental group (n = 12) and a control group (n = 12). The rapid change of direction mobility was systematically investigated by using outdoor tests, the Illinois 505 Agility Test, the Square Pace Test, the Nebraska Agility Test, and the T-Shape Agility Test. RESULTS With the intervention of training, considerable improvements were detected in all indicators, with the SPARQ training approach outperforming. CONCLUSION The combined results indicate that SPARQ training can deliver favourable efficiency in terms of enhancing the agility of young football players.
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Affiliation(s)
- Yuhang Zhou
- College of Physical Education, Liaoning Normal University, Dalian, CHINA
| | - Feng Tai
- College of Physical Education, Liaoning Normal University, Dalian, CHINA
| | - Shibo Yu
- College of Physical Education, Liaoning Normal University, Dalian, CHINA
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13
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Ermidis G, Mohr M, Jamurtas AZ, Draganidis D, Poulios A, Papanikolaou K, Vigh-Larsen JF, Loules G, Sovatzidis A, Nakopoulou T, Tsimeas P, Douroudos II, Papadopoulos C, Papadimas G, Rosvoglou A, Liakou C, Deli CK, Georgakouli K, Chatzinikolaou A, Krustrup P, Fatouros IG. Recovery during Successive 120-min Football Games: Results from the 120-min Placebo/Carbohydrate Randomized Controlled Trial. Med Sci Sports Exerc 2024; 56:1094-1107. [PMID: 38306312 DOI: 10.1249/mss.0000000000003398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
PURPOSE This study aimed to examine the recovery kinetics (i.e., time-dependent changes) of performance-related variables between two 120-min male football games performed 3 d apart with and without carbohydrate supplementation. METHODS Twenty male players (20 ± 1 yr; body fat, 14.9% ± 5.1%; maximal oxygen consumption, 59.4 ± 3.7 mL·kg -1 ·min -1 ) participated in two 120-min football games (G1, G2) according to a randomized, two-trial, repeated-measures, crossover, double-blind design. Participants received carbohydrate/placebo supplements during recovery between games. Field activity was monitored during the games. Performance testing and blood sampling were performed before and at 90 and 120 min of each game. Muscle biopsies were collected at baseline and at 90 and 120 min of G1 and pre-G2. RESULTS Compared with G1, G2 was associated with reduced total distance (10,870 vs 10,685 m during 90 min and 3327 vs 3089 m during extra 30 min; P = 0.007-0.038), average (6.7 vs 6.2 km/h during extra 30-min game-play; P = 0.007) and maximal speed (32.2 vs 30.2 km/h during 90 min and 29.0 vs 27.9 km/h during extra 30 min; P < 0.05), accelerations/decelerations ( P < 0.05), and mean heart rate ( P < 0.05). Repeated sprint ability ( P < 0.001), jumping ( P < 0.05), and strength ( P < 0.001) performance were compromised before and during G2. Muscle glycogen was not restored at G2 baseline ( P = 0.005). Extended game-play reduced lymphocyte, erythrocyte counts, hematocrit, hemoglobin, reduced glutathione ( P < 0.05) and increased delayed onset of muscle soreness, creatine kinase activity, blood glycerol, ammonia, and protein carbonyls ( P < 0.05) before and during G2. Pax7 + ( P = 0.004) and MyoD + cells ( P = 0.019) increased at baseline G2. Carbohydrate supplementation restored performance and glycogen, reduced glycerol and delayed onset of muscle soreness responses, and increased leukocyte counts and Pax7 + and MyoD + cells. CONCLUSIONS Results suggest that extended football games induce a prolonged recovery of performance, which may be facilitated by carbohydrate supplementation during a congested game fixture.
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Affiliation(s)
- Georgios Ermidis
- Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, DENMARK
| | | | - Athanasios Z Jamurtas
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | - Dimitrios Draganidis
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | - Athanasios Poulios
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | | | - Jeppe F Vigh-Larsen
- Department of Public Health, Section of Sport Science, Aarhus University, Aarhus, DENMARK
| | - Georgios Loules
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | | | | | - Panagiotis Tsimeas
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | | | - Constantinos Papadopoulos
- First Department of Neurology, Aeginition Hospital, School of Medicine, National and Kapodistrian University, Athens, GREECE
| | - Giorgos Papadimas
- First Department of Neurology, Aeginition Hospital, School of Medicine, National and Kapodistrian University, Athens, GREECE
| | - Anastasia Rosvoglou
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | - Christina Liakou
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | - Chariklia K Deli
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
| | | | - Athanasios Chatzinikolaou
- Department of Physical Education and Sport Science, Democritus University of Thrace, Komotini, GREECE
| | | | - Ioannis G Fatouros
- Department of Physical Education and Sport Science, University of Thessaly, Karies, Trikala, GREECE
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14
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Rampichini S, Limonta E, Zago M, Bisconti AV, Bertozzi F, Cè E, Borrelli M, Sforza C, Esposito F. Speed Effects on the Accuracy of Heart Rate as Oxygen-Uptake Indicator in Short-Distance Shuttle Running. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024; 95:529-536. [PMID: 38100578 DOI: 10.1080/02701367.2023.2275800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 10/22/2023] [Indexed: 12/17/2023]
Abstract
Purpose: Despite the accuracy of heart rate (HR) as an indicator of the aerobic engagement has been evaluated in several intermittent on-court activities, its validity as an oxygen uptake (V ˙ O 2 ) indicator during shuttle running over short paths remains uncertain. Moreover, it is unclear whether speed may affect such validity. This study evaluated the HR ability in estimating the V ˙ O 2 during 5-m shuttle running at different speeds. Methods: V ˙ O 2 and HR of 12 physically active young men were recorded during an incremental forward running (FW) protocol and a 5-m shuttle test at 50%, 60%, and 75% of maximal aerobic speed (MAS). Slope and intercept of the relationship between HR and V ˙ O 2 (HR/V ˙ O 2 ) were individually determined, in both protocols. The HR measured during the shuttle test was used in the FW HR/V ˙ O 2 to estimate V ˙ O 2 at each shuttle speed. A paired Student's t-test compared slopes and intercepts of the two HR/V ˙ O 2 . A two-way RM-ANOVA and an equality test examined, respectively, the differences and the equality between measured and estimated V ˙ O 2 . Lastly, a Bland-Altman plot described the accuracy and precision of the estimated V ˙ O 2 at each shuttle intensity. Results: Slopes and intercepts of the HR/V ˙ O 2 appeared not different between FW and shuttle running. At 50%MAS, HR underestimated the V ˙ O 2 (~7%), whereas returned accurate values at the two higher velocities, although with high variability (±18%). Conclusions: When using HR as V ˙ O 2 indicator during shuttle running over short paths, a separated analysis of the HR validity as V ˙ O 2 indicator is recommended especially when administering different exercise intensities.
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Affiliation(s)
| | - Eloisa Limonta
- Università degli Studi di Milano
- IRCSS Ospedale Galeazzi-Sant'Ambrogio
| | | | | | | | - Emiliano Cè
- Università degli Studi di Milano
- IRCSS Ospedale Galeazzi-Sant'Ambrogio
| | | | | | - Fabio Esposito
- Università degli Studi di Milano
- IRCSS Ospedale Galeazzi-Sant'Ambrogio
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15
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Mian Darbandi S, Hosseinzadeh M, Zarei M, Behm DG. Does ipsilateral and bilateral knee strength status predict lower extremity injuries of elite judokas; a prospective cohort study. Res Sports Med 2024; 32:465-478. [PMID: 36125360 DOI: 10.1080/15438627.2022.2126777] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 09/15/2022] [Indexed: 10/14/2022]
Abstract
The association of pre-participation knee muscle strength status with lower limb injury occurrence was investigated. Knee extensors and flexors muscle strength status including the traditional hamstrings/quadriceps (H/Q), Q/Q, H/H, and the non-dominant H/Q: dominant H/Q, HQ:HQ, ratios were recorded before the 10 month judo activity. Fifteen lower limb sport injuries were recorded for 53 judokas during the follow-up questionnaires. Significant accuracy of dominant H/Q ratio 60º/s (AUC 0.702, 95% CI 0.520 to .883, p = 0.023), as well as HQ:HQ ratios 300º/s (AUC .318, 95% CI 0.138 to 0.497, p = 0.040), and 60 º/s (AUC 0.311, 95% CI 0.130 to 0.491, p = .033) were revealed discriminating between injured and uninjured judokas. The optimum cut-off of dominant H/Q ratio associated with belonging to uninjured judokas group was 43.2% (sensitivity, 0.974; specificity, 0.533). Isokinetic knee muscle dynamometry is useful for predicting the likelihood of lower limb injuries in professional judokas during competitive activity.
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Affiliation(s)
- Shirzad Mian Darbandi
- Department of Sport Rehabilitation and Health, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran
| | - Mahdi Hosseinzadeh
- Department of Sport Injuries and Corrective Exercises, Sport Sciences Research Institute, Tehran, Iran
| | - Mostafa Zarei
- Department of Sport Rehabilitation and Health, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, Newfoundland and Labrador, St. John's, Canada
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16
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Beato M, Youngs A, Costin AJ. The Analysis of Physical Performance During Official Competitions in Professional English Football: Do Positions, Game Locations, and Results Influence Players' Game Demands? J Strength Cond Res 2024; 38:e226-e234. [PMID: 38231139 DOI: 10.1519/jsc.0000000000004717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
ABSTRACT Beato, M, Youngs, A, and Costin, AJ. The analysis of physical performance during official competitions in professional English football: Do positions, game locations, and results influence players' game demands? J Strength Cond Res 38(5): e226-e234, 2024-This study aimed, first, to verify if physical parameters were different between players' positions during official matches in English professional football, and second, if the game location (H and A) or results (W, L, D) affected players' physical performance. Twenty-five male professional football players of the same team were included in this data analysis (age = 27 ± 9 years) during the 2022-23 season. Players were divided into positions: center backs, wide backs, center midfielders, attacking midfielders, and strikers. The external load parameters were distance covered, high-speed running (HSR), sprinting distance, accelerations, decelerations, and high metabolic load distance (HMLD, meters > 25.5 w·kg -1 ) that were monitored using global navigation satellite systems Apex (STATSports). Linear mixed models' analysis for positions reported a significant difference in total distance ( p = 0.011), HSR ( p < 0.001), sprinting distance ( p < 0.001), accelerations ( p = 0.003), decelerations ( p = 0.002), and HMLD ( p < 0.001). Centre backs showed the lowest physical performance in the metrics analyzed, whereas players in the other positions frequently displayed a similar physical performance. Regarding locations and results, differences were only found between locations for decelerations ( p = 0.041) and between results for HMLD ( p = 0.010). In conclusion, physical performance was influenced by players' positions, whereas game location or results seem to not affect physical performance during official competitions. Consequently, practitioners can physically prepare their players independently from the location of the match or of the possible game results, whereas specific positional training is requested to optimally prepare their players.
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Affiliation(s)
- Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom; and
| | - Anna Youngs
- Department of Sport Science, Ipswich Town FC, Ipswich, United Kingdom
| | - Andrew J Costin
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom; and
- Department of Sport Science, Ipswich Town FC, Ipswich, United Kingdom
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17
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Staśkiewicz-Bartecka W, Kardas M, Zydek G, Zając A, Chycki J. Changes in Body Composition and Nutritional Periodization during the Training Macrocycle in Football-A Narrative Review. Nutrients 2024; 16:1332. [PMID: 38732581 PMCID: PMC11085159 DOI: 10.3390/nu16091332] [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: 04/05/2024] [Revised: 04/23/2024] [Accepted: 04/27/2024] [Indexed: 05/13/2024] Open
Abstract
Nutrition periodization in football training is an important determinant of adaptation to cyclic training loads. Personalizing an athlete's diet is crucial to ensure optimal performance and body composition, depending on the phase of training. The purpose of this review is to answer the question of how the body composition of football players changes over the training macrocycle and how dietary recommendations should be tailored to specific training periods. The review of scientific evidence was conducted based on the available literature, typing in phrases related to training and nutrition periodization using the PubMed and Google Scholar database methodology tools. A literature search resulted in the selection of 346 sources directly related to the topic of the study, and then those with the highest scientific value were selected. There is a need to adjust energy and nutrient intake according to the different training phases in a football player's preparation cycle. During the preparatory phase, it is recommended to increase protein and energy intake to support anabolic processes and muscle mass development. During the competitive period, due to the intensity of matches and training, the importance of carbohydrates for glycogen replenishment and recovery is emphasized. The transition phase requires the regulation of caloric intake to prevent adverse changes in body composition. Hydration has been identified as a key element in each phase of training. Cooperation between coaches, nutritionists, and players is essential to optimize sports performance and rapid recovery, and the authors recommend continuous adaptation and nutritional optimization as an integral part of football training.
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Affiliation(s)
- Wiktoria Staśkiewicz-Bartecka
- Department of Food Technology and Quality Evaluation, Department of Dietetics, Faculty of Public Health in Bytom, Medical University of Silesia in Katowice, ul. Jordana 19, 41-808 Zabrze, Poland;
| | - Marek Kardas
- Department of Food Technology and Quality Evaluation, Department of Dietetics, Faculty of Public Health in Bytom, Medical University of Silesia in Katowice, ul. Jordana 19, 41-808 Zabrze, Poland;
| | - Grzegorz Zydek
- Department of Sport Nutrition, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland;
| | - Adam Zając
- Department of Sports Training, Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland; (A.Z.); (J.C.)
| | - Jakub Chycki
- Department of Sports Training, Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland; (A.Z.); (J.C.)
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18
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Rømer T, Hansen MT, Lange KK, Petersen ML, Ibh AP, Panduro J, Krustrup P, Dela F, Helge JW. Peak fat oxidation, peak oxygen uptake, and running performance increase during pre-season in sub-elite male football players. Scand J Med Sci Sports 2024; 34:e14617. [PMID: 38566409 DOI: 10.1111/sms.14617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/12/2024] [Accepted: 03/13/2024] [Indexed: 04/04/2024]
Abstract
PURPOSE In Football, the high-intensity running bouts during matches are considered decisive. Interestingly, recent studies showed that peak fat oxidation rates (PFO) are higher in football players than other athletes. This study aimed to investigate whether PFO increases following a pre-season. Secondarily, and due to COVID-19, we investigated whether PFO is related to the physical performance in a subgroup of semi-professional male football players. METHODS Before and after 8 weeks of pre-season training, 42 sub-elite male football players (18 semi-professionals and 24 non-professionals) had a dual-energy x-ray absorptiometry scan and performed a graded exercise test on a treadmill for the determination of PFO, the exercise intensity eliciting PFO (Fatmax) and peak oxygen uptake (V̇O2peak). Additionally, the semi-professional players performed a Yo-Yo Intermittent Recovery Test level 2 (YYIR2) before and after pre-season training to determine football-specific running performance. RESULTS PFO increased by 11 ± 10% (mean ± 95% CI), p = 0.031, and V̇O2peak increased by 5 ± 1%, p < 0.001, whereas Fatmax was unchanged (+12 ± 9%, p = 0.057), following pre-season training. PFO increments were not associated with increments in V̇O2peak (Pearson's r2 = 0.00, p = 0.948) or fat-free mass (FFM) (r2 = 0.00, p = 0.969). Concomitantly, YYIR2 performance increased in the semi-professional players by 39 ± 17%, p < 0.001, which was associated with changes in V̇O2peak (r2 = 0.35, p = 0.034) but not PFO (r2 = 0.13, p = 0.244). CONCLUSIONS PFO, V̇O2peak, and FFM increased following pre-season training in sub-elite football players. However, in a subgroup of semi-professional players, increments in PFO were not associated with improvements in YYIR2 performance nor with increments in V̇O2peak and FFM.
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Affiliation(s)
- Tue Rømer
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mikkel Thunestvedt Hansen
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kristine Kjær Lange
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mikkel Lundgren Petersen
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anders Petersen Ibh
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jeppe Panduro
- Department of Sports Science and Clinical Biomechanics, Sport and Health Sciences Cluster (SHSC), Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Peter Krustrup
- Department of Sports Science and Clinical Biomechanics, Sport and Health Sciences Cluster (SHSC), Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
- Danish Institute for Advanced Study (DIAS), University of Southern Denmark, Odense, Denmark
- Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Flemming Dela
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Geriatrics, Bispebjerg University Hospital, Copenhagen, Denmark
- Department of Human Physiology and Biochemistry, Riga Stradiņš University, Riga, Latvia
| | - Jørn Wulff Helge
- Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Sanders N, Randell RK, Thomas C, Bailey SJ, Clifford T. Sleep architecture of elite soccer players surrounding match days as measured by WHOOP straps. Chronobiol Int 2024; 41:539-547. [PMID: 38438323 DOI: 10.1080/07420528.2024.2325022] [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: 10/09/2023] [Accepted: 02/23/2024] [Indexed: 03/06/2024]
Abstract
This study aimed to quantify and compare sleep architecture before and after home and away matches in elite soccer players from the English Premier League. Across two seasons, 6 male players (age 28 ± 5 y; body mass 85.1 ± 9.5 kg; height 1.86 ± 0.09 m) wore WHOOP straps to monitor sleep across 13 matches that kicked off before 17:00 h. For each, sleep was recorded the night before (MD-1), after (MD) and following the match (MD +1). Across these 3 days total sleep time (TST), sleep efficiency (SE), sleep disturbances, wake time, light sleep, deep sleep, REM sleep, sleep and wake onsets, alongside external load, were compared. TST was reduced after MD versus MD +1 (392.9 ± 76.4 vs 459.1 ± 66.7 min, p = 0.003) but no differences existed in any other sleep variables between days (p > 0.05). TST did not differ after home (386.9 ± 75.7 min) vs. away matches (401.0 ± 78.3 min) (p = 0.475), nor did other sleep variables (p > 0.05). GPS-derived external load peaked on MD (p < 0.05). In conclusion, despite reduced TST on MD, sleep architecture was unaffected after matches played before 17:00 h, suggesting sleep quality was not significantly compromised.
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Affiliation(s)
- Nicole Sanders
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Rebecca K Randell
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
- Gatorade Sports Science Institute, Life Sciences R&D, PepsiCo, Leicester, UK
| | - Craig Thomas
- The Northumbria Centre for Sleep Research, Northumbria University, Newcastle, UK
| | - Stephen J Bailey
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Tom Clifford
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
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20
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Djientcheu DFY, Azabji-Kenfack M, Kameni PM, Bilanda DC, Femoe MU, Ngoungoure MC, Kamtchouing P, Dzeufiet DPD. Analysis of Sinus Variability in a Group of Cameroonian Athletes. JOURNAL OF SPORTS MEDICINE (HINDAWI PUBLISHING CORPORATION) 2024; 2024:1752677. [PMID: 38572353 PMCID: PMC10987244 DOI: 10.1155/2024/1752677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 04/05/2024]
Abstract
Background Heart rate variability (HRV) analysis is a useful method for assessing the heart's ability to adapt to endogenous and exogenous loads. Data from African population on HRV are scarce and even more so in sports populations. This study aimed to compare cardiac autonomic modulation response in Cameroonian athletes and sedentary. Methodology. We conducted a prospective and analytical study in sports teams in the city of Yaoundé, Cameroon. The participants in our study were divided in three groups; people who practiced little or no sporting activity (sedentary as group 1) or who were regularly physically active as part of a sports team (footballers or handballers as second and third groups). They had to be aged 18 or over and have given their informed consent. Heart rate (HR) was continuously recorded at rest for ten minutes and then transferred to a computer equipped with Kubios HRV Standard software for analysis. Means ± mean standard errors were compared using the one-way ANOVA test, followed by Tukey's post-test. The significance threshold was set at 0.05. Results Of the 60 people selected to participate to our study, 75.0% were sportsmen (40.0% handball players and 35.0% footballers). The resting HR of sedentary people was higher (p < 0.001) than that of footballers and handball players. The SDNN, RMSSD, and pNN50 of sedentary people (16.22 ± 1.04; 9.97 ± 0.46; and 0.16 ± 0.06) were lower than those of footballers (30.13 ± 2.93; 20.61 ± 2.46; and 2.99 ± 0.63, with p < 0.001) and handball players (29.00 ± 1.86; 16.44 ± 1.16; and 2.15 ± 0.38, with p < 0.001 and p < 0.05 respectively). Absolute and relative very-low-frequency (VLF) power, absolute low and high-frequency (LF and HF) power, as well as total power (TP) were lower in sedentary people (3.66 ± 0.08 and 16.21 ± 0.64; 5.04 ± 0.15 and 2.50 ± 0.16 and 246.40 ± 18.04) compared to footballers (5.09 ± 0.24 and 26.87 ± 1.76; 5.85 ± 0.32 and 3.92 ± 0.22 and 836.10 ± 103.70, with p < 0.001, p < 0.01, and p < 0.001) and handball players (4.86 ± 0.16 and 30.82 ± 2.67; 6.03 ± 0.19 and 3.46 ± 0.16 and 927.30 ± 94.12, with p < 0.001, p < 0.05, p < 0.01, and p < 0.001). The LF/HF ratio was 12.1% and 20.1% lower in sedentary people (7.55 ± 0.58) compared with footballers (8.46 ± 0.50) and handball players (9.07 ± 0.60), respectively. Conclusion Sportsmen showed greater parasympathetic and global modulation when compared to sedentary people.
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Affiliation(s)
- Deugoue F. Y. Djientcheu
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
- Laboratory of Physiology, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - M. Azabji-Kenfack
- Laboratory of Physiology, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Poumeni M. Kameni
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - D. C. Bilanda
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Membe U. Femoe
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - M. C. Ngoungoure
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - P. Kamtchouing
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Djomeni P. D. Dzeufiet
- Laboratory of Animal Physiology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
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21
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Lee YS, Lee D, Ahn NY. SAQ training on sprint, change-of-direction speed, and agility in U-20 female football players. PLoS One 2024; 19:e0299204. [PMID: 38478514 PMCID: PMC10936847 DOI: 10.1371/journal.pone.0299204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 02/06/2024] [Indexed: 03/20/2024] Open
Abstract
The purpose of the study was to investigate the effects of an 8-week speed, agility, and quickness (SAQ) training on performance changes in linear sprint speed, change-of-direction (COD) speed, and reactive agility of U-20 female football players. Nineteen female football players randomly served as either experimental (n = 9) or control groups (n = 10). The players were tested for physical fitness tests: linear sprint speed including both short and long distances (5- and 10-m sprints without a ball and 20- and 30-m sprints with and without dribbling), COD speed (arrowhead agility test with and without dribbling a ball, Southeast Missouri [SEMO] agility test, and 22-m repeated slalom dribbling test), and reactive agility. Significant group × time interactions were observed for sprint over long distances and COD speed but not for short sprint and reactive agility performances. Paired t-tests revealed considerable improvements in all performances from the pre-test to post-test for the SAQ group, except for the arrowhead agility (left; p = .07). The control group only exhibited significant improvements in 10-m sprint performance after general football training. Eight weeks of SAQ training were effective at enhancing acceleration, maximum sprint speed, and agility performances amongst highly trained U-20 female football players.
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Affiliation(s)
- Young-Soo Lee
- Department of Physical Education, Sejong University, Seoul, South Korea
| | - Dayoung Lee
- Department of Sport Science, Kangwon National University, Chuncheon, South Korea
| | - Na Young Ahn
- Department of Sport and Event Management, Bournemouth University, Poole, United Kingdom
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22
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Sebastiá-Rico J, Martínez-Sanz JM, Sanchis-Chordà J, Alonso-Calvar M, López-Mateu P, Romero-García D, Soriano JM. Supplement Consumption by Elite Soccer Players: Differences by Competitive Level, Playing Position, and Sex. Healthcare (Basel) 2024; 12:496. [PMID: 38391871 PMCID: PMC10887827 DOI: 10.3390/healthcare12040496] [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: 01/22/2024] [Revised: 02/13/2024] [Accepted: 02/17/2024] [Indexed: 02/24/2024] Open
Abstract
Soccer is a sport practiced all over the world and whose practice begins in young athletes. Currently, the consumption of nutritional supplements is essential to achieve the maximum performance of players. The aim of this study was to describe the consumption of sports supplements (CSS) by elite soccer players and its association with their competitive level, playing position, and sex. A comparative descriptive and non-experimental study was performed during the 2021-2022 competitive season. A total of 70 elite players completed one online questionnaire about their CSS. We found that sports drinks (55.7%), sports bars (50.0%), whey protein (48.6%), caffeine (47.1%), and creatine (60.0%) were the most consumed supplements by the total sample. Relative to the categories, the CSS was higher in the senior teams for both men and women. Regarding playing positions, caffeine was more consumed by midfielders and forwards (p = 0.013). Finally, in relation to sex, significant differences were found in the consumption of sports confectionery (p = 0.036), whey protein (p = 0.002), β-alanine (p = 0.013), and melatonin (p = 0.016). Soccer club SS questionnaires gather data to understand patterns, assess effectiveness and risks, and aid research. In conclusion, differences were found in the CSS according to competitive level, sex, and playing position.
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Affiliation(s)
- Jaime Sebastiá-Rico
- Area of Nutrition, University Clinic of Nutrition, Physical Activity and Physiotherapy (CUNAFF), Lluís Alcanyís Foundation-University of Valencia, 46020 Valencia, Spain
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
| | | | | | - Miguel Alonso-Calvar
- Area of High Conditional Performance, Academia Valencia CF SAD, 46980 Paterna, Spain
| | - Pedro López-Mateu
- Area of Medical Services, Academia Valencia CF SAD, 46980 Paterna, Spain
| | | | - Jose M Soriano
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
- Joint Research Unit of Endocrinology, Nutrition and Clinical Dietetics, Health Research Institute La Fe-University of Valencia, 46026 Valencia, Spain
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23
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Brinkmans N, Plasqui G, van Loon L, van Dijk JW. Energy expenditure and dietary intake in professional female football players in the Dutch Women's League: Implications for nutritional counselling. J Sports Sci 2024; 42:313-322. [PMID: 38478743 DOI: 10.1080/02640414.2024.2329850] [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: 12/01/2023] [Accepted: 03/06/2024] [Indexed: 04/23/2024]
Abstract
In contrast to male football players, research on the nutritional requirements of female football players is limited. This study aimed to assess total daily energy expenditure (TDEE) in professional female football players, along with body composition, physical activity and dietary intake. This observational study included 15 professional football players playing in the highest Dutch Women's League. TDEE was assessed by doubly labelled water over 14 days, along with resting metabolic rate (RMR; ventilated hood), fat-free mass (FFM; dual-energy x-ray absorptiometry), and dietary intake (24-h recalls). Physical activity energy expenditure (PAEE) was derived from subtracting RMR and estimated diet-induced thermogenesis (10%) from TDEE. TDEE was 2882 ± 278 kcal/day (58 ± 5 kcal/kg FFM) and significantly (p < 0.05) correlated with FFM (r = 0.62). PAEE was 1207 ± 213 kcal/d. Weighted energy intake was 2344 kcal [2023-2589]. Carbohydrate intakes were 3.2 ± 0.7, 4.4 ± 1.1 and 5.3 ± 1.9 g/kg body mass for rest, training and match days, respectively, while weighted mean protein intake was 1.9 ± 0.4 g/kg body mass. In conclusion, the energy requirements of professional female football players are moderate to high and can be explained by the substantial PAEE. To fuel these requirements, sports nutritionists should consider shifting the players' focus towards prioritizing adequate carbohydrate intakes, rather than emphasizing high protein consumption.
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Affiliation(s)
- Naomi Brinkmans
- Institute of Sports and Exercise Studies, HAN University of Applied Sciences, Nijmegen, The Netherlands
- NUTRIM Institute of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Guy Plasqui
- NUTRIM Institute of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Luc van Loon
- NUTRIM Institute of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Jan-Willem van Dijk
- Institute of Sports and Exercise Studies, HAN University of Applied Sciences, Nijmegen, The Netherlands
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24
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Guimarães RDS, García-Calvo T, Raya-González J, Ponce-Bordón JC, Fatela P, Lobo-Triviño D. Effects of Contextual Variables on Match Load in a Professional Soccer Team Attending to the Different Season Periods. SENSORS (BASEL, SWITZERLAND) 2024; 24:679. [PMID: 38276372 PMCID: PMC10820192 DOI: 10.3390/s24020679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
This study aimed to analyze the effects of contextual variables (i.e., match location and match outcome) and season periods on match load (i.e., internal and external load) in professional Brazilian soccer players. Thirty-six professional players from the same soccer team participated in this study. The season was split into four phases: matches 1-16 (i.e., Phase 1 = P1); matches 17-32 (i.e., Phase 2 = P2); matches 33-48, (i.e., Phase 3 = P3); matches 49-65 (i.e., Phase 4 = P4). Considering match outcome, when the team wins, Cognitive load, Emotional load, and Affective load were significantly higher in away vs. home matches (p < 0.05). Considering season phases, in P3, Mental Fatigue was significantly higher in drawing than in losing matches (p < 0.05). Additionally, considering the match outcome, when the team lost, Total Distance (TD)/min and TD > 19 km·h-1/min were significantly lower in P1 than P2 (p < 0.001), P3 (p < 0.001), and P4 (p < 0.001). These results suggest to strength and conditioning coaches the need to consider the outcome and location of the previous game when planning the week, as well as the phase of the season they are in to reduce fatigue and injury risk.
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Affiliation(s)
- Rodrigo dos Santos Guimarães
- Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad S/N, 10003 Caceres, Spain; (R.d.S.G.); (J.R.-G.); (J.C.P.-B.); (D.L.-T.)
| | - Tomás García-Calvo
- Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad S/N, 10003 Caceres, Spain; (R.d.S.G.); (J.R.-G.); (J.C.P.-B.); (D.L.-T.)
| | - Javier Raya-González
- Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad S/N, 10003 Caceres, Spain; (R.d.S.G.); (J.R.-G.); (J.C.P.-B.); (D.L.-T.)
| | - José C. Ponce-Bordón
- Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad S/N, 10003 Caceres, Spain; (R.d.S.G.); (J.R.-G.); (J.C.P.-B.); (D.L.-T.)
| | - Pedro Fatela
- Faculty of Human Kinetics, University of Lisbon, Estr. da Costa, 1495-751 Cruz Quebrada, Portugal;
| | - David Lobo-Triviño
- Faculty of Sport Sciences, University of Extremadura, Avenida de la Universidad S/N, 10003 Caceres, Spain; (R.d.S.G.); (J.R.-G.); (J.C.P.-B.); (D.L.-T.)
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25
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Riansoi Y, Tongnillpant N, Thammawong S, Ribeiro J, Zacca R, Chainok P. Follow-Up Weekly Training Distribution and Accumulated Internal Load Effects on Young Football Players' Well-Being, Physical Fitness, and Technical Performance. Sports (Basel) 2024; 12:23. [PMID: 38251297 PMCID: PMC10818362 DOI: 10.3390/sports12010023] [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: 11/28/2023] [Revised: 12/26/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024] Open
Abstract
This study aimed to quantify the relationships among internal training load, wellness, physiological, isokinetic profile, and technical performance and assessed changes before and after a six-week pre-season structured combining physical fitness, small-sided-game and skill-based training program in young soccer players. Forty-five national-level young male soccer players (16.8 ± 0.9 years) were evaluated. There were no significant correlations between the wellness index and the physiological, isokinetic, or specific soccer skill parameters. Moderate correlations were observed between fatigue and stress (r = 0.47, moderate, p < 0.01), fatigue and average muscle soreness (r = 0.38, moderate, p = 0.01), and a large correlation between average stress and muscle soreness (r = 0.53, large, p < 0.01) were presented. All physiological, isokinetic, and technical parameters improved after a six-week pre-season training program (0.1 to -61.0%). Significant alterations in the physiological domain were observed after a six-week period, particularly in the fatigue index of the Bangsbo sprint test, YO-YO IR1 performance, and YO-YO peak La- (p < 0.01; -61.0%, 25.3%, and -19.8%, respectively). As such, the implementation of structured training and the monitoring of stress responses can lead to appropriate adaptation and balancing in the psychological and physical well-being of young national-level soccer players, particularly in the pre-season period.
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Affiliation(s)
- Yutthana Riansoi
- Faculty of Science, Chandrakasem Rajabhat University, Bangkok 10900, Thailand;
| | | | - Sakdarin Thammawong
- Faculty of Sport Science and Health, Thailand National Sports University, Udonthani Campus, Udonthani 12110, Thailand;
| | - João Ribeiro
- Center of Research, Education, Innovation and Intervention in Sports (CIFI2D), Faculty of Sports, University of Porto, 4099-002 Porto, Portugal;
| | - Rodrigo Zacca
- Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports, University of Porto (FADEUP), 4099-002 Porto, Portugal;
- Laboratory for Integrative and Translational Research in Population Health (ITR), 4050-600 Porto, Portugal
| | - Phornpot Chainok
- Faculty of Sports Science, Burapha University, Chonburi 20131, Thailand
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26
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Van de Casteele F, Deprez D, Van Haaren J, Derave W, Lievens E. In professional football the decline in high-intensity running activities from first to second half is more pronounced in players with a fast muscle typology. Scand J Med Sci Sports 2024; 34:e14508. [PMID: 37792860 DOI: 10.1111/sms.14508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/30/2023] [Accepted: 09/19/2023] [Indexed: 10/06/2023]
Abstract
Muscle typology is heterogeneous among national level football (soccer) players, but positional differences remain unclear. Furthermore, fast typology (FT) individuals fatigue more than slow typology (ST) individuals in lab conditions. Therefore, we investigated if muscle typology is different between playing positions and if the decay in high-intensity activities from the first to the second half is larger in FT football players than in ST players. We estimated muscle typology in 147 male professional football players by measuring soleus and gastrocnemius muscle carnosine via proton magnetic resonance spectroscopy. Players were classified as ST, intermediate typology (IT) or FT and categorized as goalkeeper, center back, full back, midfielder, winger or forward. Across four seasons in-game distances covered in multiple running speed, acceleration and deceleration zones were collected during the first and second half. We found no differences in muscle typology between positions (p = 0.412). FT players covered 10.9% more high acceleration distance (>3 m.s-2 ) in the first half than ST players (p = 0.021) and high acceleration distance decay was larger for FT players (-12.4%) than ST (-7.7%; p = 0.006) and IT players (-7.3%; p = 0.010). Moreover, the decline in distance covered in several high-intensity zones tended to be larger in FT players (-11.2% high-intensity >15 km.h-1 ; -12.7% high deceleration <-3 m.s-2 ; -11.5% medium acceleration 2-3 m.s-2 ) than in ST players (-7.1% high-intensity; -8.1% high deceleration; -8.1% medium acceleration; 0.05 < p < 0.1). In conclusion, possessing a particular muscle typology is not required to play any football position at the national level. However, there are indications that FT players might fatigue more toward the end of the game compared to ST players.
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Affiliation(s)
| | | | - Jan Van Haaren
- Club Brugge NV, Knokke-Heist, Belgium
- Department of Computer Science, KU Leuven, Leuven, Belgium
| | - Wim Derave
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
| | - Eline Lievens
- Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium
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27
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Vigh-Larsen JF, Mohr M. The physiology of ice hockey performance: An update. Scand J Med Sci Sports 2024; 34:e14284. [PMID: 36517860 DOI: 10.1111/sms.14284] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/11/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022]
Abstract
Ice hockey is an intense team sport characterized by repeated bursts of fast-paced skating, rapid changes in speed and direction and frequent physical encounters. These are performed in on-ice shifts of ~30-80 s interspersed with longer sequences of passive recovery, resulting in about 15-25 min on-ice time per player. Nearly 50% of the distance is covered at high-intensity skating speeds and with an accentuated intense activity pattern in forwards compared to defensemen. During ice hockey match-play, both aerobic and anaerobic energy systems are significantly challenged, with the heart rate increasing toward maximum levels during each shift, and with great reliance on both glycolytic and phosphagen ATP provision. The high-intensity activity pattern favors muscle glycogen as fuel, leading to pronounced reductions despite the relatively brief playing time, including severe depletion of a substantial proportion of individual fast- and slow-twitch fibers. Player-tracking suggests that the ability to perform high-intensity skating is compromised in the final stages of a game, which is supported by post-game reductions in repeated-sprint ability. Muscle glycogen degradation, in particular in individual fibers, as well as potential dehydration and hyperthermia, may be prime candidates implicated in exacerbated fatigue during the final stages of a game, whereas multiple factors likely interact to impair exercise tolerance during each shift. This includes pronounced PCr degradation, with potential inadequate resynthesis in a proportion of fast-twitch fibers in situations of repeated intense actions. Finally, the recovery pattern is inadequately described, but seems less long-lasting than in other team sports.
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Affiliation(s)
- Jeppe F Vigh-Larsen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Magni Mohr
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Centre of Health Sciences, University of the Faroe Islands, Tórshavn, Faroe Islands
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28
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Brito P, Costa JA, Figueiredo P, Brito J. Simulated Soccer Game Protocols: A Systematic Review on Validated Protocols That Represent the Demands of the Game. J Strength Cond Res 2024; 38:192-205. [PMID: 38085629 DOI: 10.1519/jsc.0000000000004604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
ABSTRACT Brito, P, Costa, J, Figueiredo, P, and Brito, J. Simulated soccer game protocols: A systematic review on validated protocols that represent the demands of the game. J Strength Cond Res 38(1): 192-205, 2024-Several laboratory and field testing protocols have been developed attempting to simulate the activity pattern and physiological demands of soccer. In the present systematic review, we aimed to analyze and discuss the appropriateness, strengths, and limitations of soccer-specific simulated tests. A systematic review of the literature was conducted based on the PRISMA guidelines. Studies conducted in soccer, simulated soccer match tests, and validated simulation protocols performed on-the-field or on a treadmill were considered. No sex restriction was applied, and age >18 years (i.e., adults) was considered. At least 1 outcome measure (e.g., neuromuscular performance, external load, internal load, or psychometric state) of post-simulated-match test or protocol had to be reported. Within the 14 studies included, the average methodological quality of the included articles was 0.61 ± 0.09 (mean ± SD) of 1. Overall, 9 validated protocols were identified. In the protocols, only amateur, university, or semiprofessional soccer players were analyzed. Only one study evaluated female soccer players. None of the studies evaluated the effect on performance over the 2-3 days after the protocol. Accelerations and decelerations, and changes in direction typically present in a game have not been clearly described in any protocol. Future research should address this issue and validate soccer-specific protocols in women.
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Affiliation(s)
- Pedro Brito
- Research Center in Sports Sciences, Health Sciences, and Human Development, CIDESD, University of Maia, ISMAI, Maia, Portugal
| | - Júlio A Costa
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
| | - Pedro Figueiredo
- Physical Education Department, College of Education, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates; and
- Research Center in Sports Sciences, Health Sciences, and Human Development, CIDESD, Portugal
| | - João Brito
- Portugal Football School, Portuguese Football Federation, Oeiras, Portugal
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29
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Thomakos P, Spyrou K, Tsoukos A, Katsikas C, Bogdanis GC. High-Intensity Interval Training Combined with High-Load Strength Training Improves Aerobic Fitness, Match Goals and Match Result during the In-Season Period in Under-19 Soccer Players. Sports (Basel) 2023; 12:2. [PMID: 38275981 PMCID: PMC10819200 DOI: 10.3390/sports12010002] [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: 11/28/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024] Open
Abstract
This study compared the effects of adding a weekly session of either strength training followed by high-intensity interval training (HIIT) or high load plyometric training followed by small-sided games (SSG) on aerobic fitness, goals scored and conceded, and match results. Twenty-nine players from two youth elite teams competing in an under 19 (U19) first division league took part in the study. Of those, 16 players from one team followed the HIIT program (age: 17.8 ± 0.6 years) and 13 players from the other team trained once a week, following the SSG program (age: 18.0 ± 0.6 years). The training intervention lasted for 11 weeks and was applied once per week. For the HIIT team it included high-load strength training (80-95% of 1 RM) followed by high-intensity intermittent running, whereas for the SSG team (n = 13) it included plyometric exercises followed by SSG. Aerobic fitness was assessed before and after the intervention, while goals scored and conceded, as well as match results during the intervention period, were compared with the 11-week period preceding it. Only the HIIT team improved Yo-Yo IR2 performance (running distance: from 902.5 ± 147.5 to 1092.5 ± 155.8 m, p < 0.001) while there was no change for the SSG group. Moreover, during the 11-week intervention, the HIIT team improved the number of goals scored in the last 30 min of the game compared with the pre-intervention period (0.36 ± 0.50 to 1.27 ± 0.90 per match, p < 0.05) and the scored vs. conceded goals were higher in the second half (1.36 ± 1.03 vs. 0.27 ± 0.47, p < 0.05). No significant differences were found for these parameters in the SSG team. Regarding match result, the HIIT team increased the proportion of wins from 5 wins in 11 matches (or 45%) in the pre-intervention period to 9 wins in 11 matches (or 82%) during the intervention period, while this profile remained unchanged for the SSG team. In conclusion, the present study demonstrated that the HIIT program performed once per week was superior to SSG as it improves aerobic fitness, scored and conceded goals, and match result during the in-season period.
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Affiliation(s)
- Pierros Thomakos
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece; (A.T.); (C.K.); (G.C.B.)
| | - Konstantinos Spyrou
- UCAM Research Center for High Performance Sport, Catholic University of Murcia (UCAM), 30005 Murcia, Spain;
- Facultad de Deporte, Catholic University of Murcia (UCAM), 30005 Murcia, Spain
| | - Athanasios Tsoukos
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece; (A.T.); (C.K.); (G.C.B.)
| | - Christos Katsikas
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece; (A.T.); (C.K.); (G.C.B.)
| | - Gregory C. Bogdanis
- School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece; (A.T.); (C.K.); (G.C.B.)
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30
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Andersen TR, Drevsfeldt A, Möller S, Møller M. Injuries in male youth football: a one season prospective cohort study of 223 Danish elite players. Front Sports Act Living 2023; 5:1250223. [PMID: 38164442 PMCID: PMC10757927 DOI: 10.3389/fspor.2023.1250223] [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: 06/29/2023] [Accepted: 11/22/2023] [Indexed: 01/03/2024] Open
Abstract
Objectives This study prospectively investigated injury prevalence, incidence, and burden in male elite under-17 football players (N = 223) during a full season. Methods The players weekly completed a standardized web-based injury survey (OSTRC-H2) and a physical exposure report throughout the study. Results Average weekly response rate was 89.5%. Football exposure accounted for 52.4% of total physical exposure. On average (±SD), the players participated in individual football, strength, and rehabilitation practices for 1.2 ± 1.5, 3.0 ± .2.1, and 1.9 ± 3.4 h/week, respectively. In total, 742 health problems were reported. Mean weekly prevalence of health problems, injuries and illnesses were 20.1%, 16.5% and 3.8%, respectively. The injury incidence per 1,000 h of football exposure, match play and team practice were 8.28 (95% CI: 7.54-9.08), 16.77 (95% CI: 13.65-20.4), and 7.24 (95% CI: 6.5-8.04), respectively. Sudden-onset and gradual-onset injuries accounted for 36.7% and 43.4% of the total proportion of health problems. Hip/groin injuries had the highest incidence (1.58/1,000 h), whereas knee injuries had the highest burden (20.86 days lost/1,000 h). On average, the players experienced 3.33 health problems (average duration: 7.8 days). On average pr. player, 2.7 (95% CI: 2.2-3.3) wks of football exposure were lost. Conclusion Sudden and gradual-onset injuries influenced player availability during the season. Health problem prevalence fluctuated markedly, and injury incidence was higher during match play than training. The players had substantial volumes of training beyond football-specific training and matches. Our findings could assist medical and sports science practitioneers in enhancing training and recovery processes to maximize player availability.
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Affiliation(s)
- Thomas Rostgaard Andersen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Danish Football Association, Brondby, Denmark
| | - Andreas Drevsfeldt
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Sören Möller
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Open Patient Data Explorative Network, Odense University Hospital, Odense, Denmark
| | - Merete Møller
- Research Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway
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31
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Durán-Custodio R, Castillo D, Raya-González J, Yanci J. Is a Maximal Strength-Training Program Effective on Physical Fitness, Injury Incidence, and Injury Burden in Semi-Professional Soccer Players? A Randomized Controlled Trial. Healthcare (Basel) 2023; 11:3195. [PMID: 38132085 PMCID: PMC10742471 DOI: 10.3390/healthcare11243195] [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: 10/30/2023] [Revised: 12/14/2023] [Accepted: 12/17/2023] [Indexed: 12/23/2023] Open
Abstract
The aims of the study were to analyze the effects of a 12-week maximal strength- training program on injury incidence, injury burden, and physical fitness in semi-professional soccer players and to compare the perceived exertion load and well-being state between injured and non-injured soccer players. Twenty semi-professional male soccer players participated in this study. Participants were randomly allocated to an experimental group (EG, n = 10 players), who performed a maximal strength-training program, or to a control group (CG, n = 10 players), who only performed their regular soccer training. Physical fitness was measured at baseline and after the training program. In addition, the injury incidence, burden, training/match load, and the state of well-being of the players were recorded. The EG showed significant improvements in vertical jumps, change in direction ability, linear sprints, repeated sprint ability, isometric strength (p < 0.003; effect size = 1.78-11.86), and quadriceps-hamstring imbalance in both legs (p < 0.001; effect size = 2.37-3.71) in comparison to the CG. In addition, the EG players showed a significantly (p < 0.05) lower injury burden (p < 0.001, relative risk = 5.05, 95% confidence interval = 3.27-7.79). This study demonstrated the beneficial effects of a 12-week maximal strength-training program on physical fitness attributes and injury burden in semi-professional soccer players.
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Affiliation(s)
- Roberto Durán-Custodio
- Faculty of Education and Sport, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain;
- Faculty of Health Sciences, International University of La Rioja (UNIR), 26006 Logroño, Spain
| | - Daniel Castillo
- Valoración del Rendimiento Deportivo, Actividad Física y Salud y Lesiones Deportivas (REDAFLED), Department of Didactics of Musical, Plastic and Corporal Expression, Faculty of Education, University of Valladolid, 42004 Soria, Spain
| | | | - Javier Yanci
- Society, Sports and Physical Exercise Research Group (GIKAFIT), Department of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain;
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Sebastiá-Rico J, Cabeza-Melendre D, Anderson L, Martínez-Sanz JM. Nitric Oxide in the Field: Prevalence and Use of Nitrates by Dietitians and Nutritionists in Spanish Elite Soccer. Nutrients 2023; 15:5128. [PMID: 38140386 PMCID: PMC10745965 DOI: 10.3390/nu15245128] [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: 11/28/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023] Open
Abstract
Soccer players make frequent use of dietary supplements to improve performance. One of the most widely used strategies to optimize performance is to increase the bioavailability of nitric oxide through nitrates, as it could delay fatigue during physical exertion, among other benefits. This may be positive for performance in soccer, although there is almost no research in professional soccer. The aim of the study was to evaluate the use of nitrates and behaviours related to their consumption in Spanish elite soccer clubs. Dietitian-nutritionist representatives from 45 teams from the most important Spanish soccer leagues completed an online survey to determine if, when, how and why nitrates are prescribed to soccer players. Of the total sample, 55.6% indicated providing nitrates, always before matches, but only 36% in training. There was a wide variation and lack of consistency in the timing, dosage and form of administration of nitrates. The use of mouthwashes or the protocol of chronic nitrate intake was not taken into account in most cases. The present study indicates a lack of interpretation between scientific knowledge and its application in practice, highlighting the need for future research to better understand how to optimize the use of nitrates in professional soccer.
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Affiliation(s)
- Jaime Sebastiá-Rico
- Area of Nutrition, University Clinic of Nutrition, Physical Activity and Physiotherapy (CUNAFF), Lluís Alcanyís Foundation—University of Valencia, 46020 Valencia, Spain
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
| | - Daniel Cabeza-Melendre
- Area of Nutrition, University Clinic of Nutrition, Physical Activity and Physiotherapy (CUNAFF), Lluís Alcanyís Foundation—University of Valencia, 46020 Valencia, Spain
| | - Liam Anderson
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 2TT, UK;
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Andersen TR, Kästner B, Arvig M, Larsen CH, Madsen EE. Monitoring load, wellness, and psychological variables in female and male youth national team football players during international and domestic playing periods. Front Sports Act Living 2023; 5:1197766. [PMID: 38162701 PMCID: PMC10757622 DOI: 10.3389/fspor.2023.1197766] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 11/20/2023] [Indexed: 01/03/2024] Open
Abstract
Aim To study differences in total load exposure, wellness, and psychological variables in youth female (N = 19) and male (N = 20) national team football players during domestic and international playing periods, respectively. Procedures The players filled out questionnaires on well-being, stress, and resilience before and after both playing periods lasting 8 days each. The Hooper index was used to monitor daily wellness levels during both playing periods. The number of training sessions and matches were recorded, and the session rating of perceived exertion was collected. Training load, monotony, and strain were calculated. Daily measurements were used to evaluate in-period changes, and composite scores were used to describe differences between periods. Results The international compared to the domestic playing period was for both groups characterized by more matches played, longer field training session durations, and of fewer gym-based sessions (P < 0.05). The male players increased total exposure time (25%; P < 0.05), monotony (P < 0.001), and strain (P < 0.001), which was not changed in the female players. Well-being decreased (P < 0.05) during the international playing period in male players. Stress levels were higher (P < 0.05) for both genders during the international compared to the domestic playing period. During the international playing period, positive correlations were found between the initial levels of stress, and the change in stress (P = 0.03; r2 = 0.12), and between the changes in total load and changes in well-being (P = 0.02; r2 = 0.12), whereas a negative correlation was found between the changes in wellness and stress (P = 0.03; r2 = 0.14). Conclusion A playing period characterized by increased match focus, longer field training sessions, and fewer gym-based training activities may lead to changes in the physical and mental profiles of youth national team football players. Alterations to load exposure and wellness may influence mental health. Players with high initial stress levels may be subjected to greater changes compared to other players. Sports scientists and medical staff may benefit from initiating structured monitoring systems to track alterations in physical load and mental health in youth national team players.
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Affiliation(s)
- Thomas Rostgaard Andersen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Danish Football Association, Brondby, Denmark
| | - Bennet Kästner
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Mathias Arvig
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Carsten Hvid Larsen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Danish Football Association, Brondby, Denmark
| | - Esben Elholm Madsen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Danish Football Association, Brondby, Denmark
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Fornaziero AM, Novack LF, Nascimento VB, Osiecki R. Acute Responses of Youth Elite Players to a Football Match in Terms of Blood Markers. Sports (Basel) 2023; 11:242. [PMID: 38133109 PMCID: PMC10747386 DOI: 10.3390/sports11120242] [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: 09/20/2023] [Revised: 11/12/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023] Open
Abstract
The current study verified the acute responses of participants to a football match in terms of blood markers. Sixteen elite U-18 male football players were divided into two groups: experimental (EG, n = 10), who played a friendly football match; and control (CG), who were not exposed to any physical exertion. Intravenous blood samples were collected from both groups at baseline, pre-match, half-time, and post-match. The blood analysis consisted of four groups: immunological (leukocytes, platelets, and cortisol), muscle damage (creatine kinase and lactate dehydrogenase), metabolic (lactate, glucose, erythrocytes, hematocrit, hemoglobin, and urea), and electrolytic (sodium, calcium, and potassium). Edwards' training impulse demonstrated that the first half was more demanding than the second half (p = 0.020). Significant changes between time points and groups were observed for leukocytes (pre-match: 6920 ± 1949; post-match: 13,890 ± 3292; p ≤ 0.05) and cortisol (pre-match: 10.78 ± 3.63; post-match: 19.15 ± 7.40; p ≤ 0.05). CK (pre-match: 516.50 ± 248.38; post-match: 713.70 ± 308.20; p ≤ 0.05) and LDH (pre-match: 348.80 ± 36.49; post-match: 414.80 ± 26.55; p ≤ 0.05) increased significantly across the time points for the EG, with no difference between the groups, however. Raised lactate (pre-match: 1.05 ± 0.32; post-match: 3.24 ± 1.60; p ≤ 0.05) and glucose (pre-match: 72.54 ± 9.76; post-match: 101.42 ± 19.87; p ≤ 0.05) differences between the groups at half-time were also observed. These current findings provide helpful information to better understand football match demands regarding physiological effects.
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Affiliation(s)
- André Montanholi Fornaziero
- Department of Physical Education, Federal University of Parana (UFPR), Curitiba 81531-980, Brazil; (L.F.N.); (V.B.N.); (R.O.)
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Oxendale CL, Highton J, Smith G, Twist C. Can Player Tracking Devices Monitor Changes in Internal Response During Multidirectional Running? RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2023; 94:975-981. [PMID: 35797088 DOI: 10.1080/02701367.2022.2092049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Purpose: We examined the movement, physiological and muscle function responses to running with and without (i.e. linear) multiple directional changes to understand which measures of external demands better reflected changes in the internal response. Methods: Twelve team sport athletes completed a linear and multidirectional running trial during which movement characteristics, oxygen consumption (V ˙ O 2 ), blood lactate (B[La]) and heart rate (HR) were measured. Isometric peak torque of knee extensors and flexors was also assessed before and after each trial. Results: High speed running distance was higher during the linear trial (p < 0.001), whereas time at high metabolic power (p = 0.046), number of accelerations (p < 0.001), summated HR (p = 0.003) and B[La] (p = 0.002) were higher during the multidirectional trial. Integrated external to internal ratios of high-speed running: summated HR and high-speed running: total V ˙ O 2 were different between multidirectional and linear trials (p ≤ 0.001). Conversely, high metabolic power: summated HR and high metabolic power: total V ˙ O 2 were similar (p ≥ 0.246). Small decrements in knee flexor (p = 0.003) and extensor torque (p = 0.004) were observed after both trials. Conclusion: Time at high metabolic power better reflects the increased internal response during running with more directional changes than high speed running.
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Saccà M, Bondi D, Balducci F, Petri C, Mazza G. Intra- and Inter-Seasonal Fitness and Training Load Variations of Elite U20 Soccer Players. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2023; 94:940-947. [PMID: 35612959 DOI: 10.1080/02701367.2022.2074951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Inherent physical and anthropometric traits of elite soccer players, influenced by nature and nurture, account for the emergence of performances across time. Purpose: The present study aimed to evaluate inter- and intraseasonal differences and the influence of playing position on training and fitness metrics in talented young soccer players. Methods: A total of 74 male players from U20 teams of a single elite club were tested both at beginning, during, and at the end of three consecutive competitive seasons. Players under went anthropometric measurement and were tested for aerobic, jumping, and sprinting performances; the GPS-derived measures of metabolic power (MP) and equivalent distance index (ED) of every athlete were analyzed. Results: Difference between teams emerged in Mognoni's test, while it did not in countermovement jump and anthropometrics. ED was different across seasons. The model selection criteria revealed that the Bosco-Vittori test achieved the best fit. BMI and countermovement jump (CMJ) increased, and fat mass decreased, during season; different intraseasonal trends for CMJ. MP was slightly greater in midfielder. Conclusion: Network approaches in modeling performance metrics in sports team could unveil original interconnections between performance factors. In addition, the authors support multiparametric longitudinal assessments and a huge database of sports data for facilitating talent identification.
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Losada-Benitez JA, Nuñez-Sánchez FJ, Barbero-Álvarez JC. Quantifying technical load and physical activity in professional soccer players during pre-season matches with IMU technology. Front Physiol 2023; 14:1274171. [PMID: 38098803 PMCID: PMC10720354 DOI: 10.3389/fphys.2023.1274171] [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: 08/07/2023] [Accepted: 11/20/2023] [Indexed: 12/17/2023] Open
Abstract
This study aimed to record, analyze and quantify professional soccer players' technical (TL) and physical load (PL) in friendly matches to compare their records during the first and second halves and between players with different positions. Eighteen professional soccer players, 24.6 ± 2.7 years, 1.78 ± 0.3 height (m), 74.6 ± 4.5 body mass (kg), 9.8 ± 2.2 body fat (%), and 65.6 ± 2.7 maximal oxygen consumption (VO2max, ml·kg-1·min-1) were monitored during six preseason friendly matches to analyze the activity profile using technical and physical variables through inertial measurement unit (IMU). No significant differences were found between the periods for the TL and PL. Significant differences were found between specific positions: Full Back (FB: n = 4), Central Defender (CD: n = 3), Midfielder (MD: n = 4), Winger (WG: n = 4), and Forward (FW: n = 3), both the TL and PL. We conclude that the PL profile based on his playing position is independent of the development of the PL shown during friendly matches. The monitoring, quantifying, and controlling of the TL added to the PL provides a more holistic vision of soccer players in friendly matches. The relative ease IMU application technology offers an alternative with less time-cost and more significant benefits than other types of technologies applied up to now.
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Affiliation(s)
- José Augusto Losada-Benitez
- Head of Performance, FC Persepolis, Tehran, Iran
- Physical Performance and Sports Research, Pablo de Olavide University, Sevilla, Spain
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Hiromatsu C, Kasahara N, Lin CA, Wang F, Goto K. Continuous Monitoring of Interstitial Fluid Glucose Responses to Endurance Exercise with Different Levels of Carbohydrate Intake. Nutrients 2023; 15:4746. [PMID: 38004140 PMCID: PMC10674876 DOI: 10.3390/nu15224746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
We compared the 24 h changes in interstitial fluid glucose concentration (IGC) following a simulated soccer match between subjects consuming a high-carbohydrate (HCHO; 8 g/kg BW/day) diet and those consuming a moderate-carbohydrate (MCHO; 4 g/kg BW/day) diet. Eight active healthy males participated in two different trials. The subjects were provided with the prescribed diets from days 1 to 3. On day 3, the subjects performed 90 min (2 bouts × 45 min) of exercise simulating a soccer match. The IGC of the upper arm was continuously monitored from days 1 to 4. No significant difference in the IGC was observed between trials during exercise. The total area under the curve (t-AUC) value during exercise did not significantly differ between the HCHO (9719 ± 305 mg/dL·90 min) and MCHO (9991 ± 140 mg/dL·90 min). Serum total ketone body and beta-hydroxybutyrate concentrations were significantly higher in the MCHO than in the HCHO after a second bout of exercise. No significant differences in the IGC were observed between trials at any time point during the night after exercise (0:00-7:00). In addition, t-AUC value during the night did not significantly differ between the HCHO (32,378 ± 873 mg/dL·420 min) and MCHO (31,749 ± 633 mg/dL·420 min). In conclusion, two days of consuming different carbohydrate intake levels did not significantly affect the IGC during a 90 min simulated soccer match. Moreover, the IGC during the night following the exercise did not significantly differ between the two trials despite the different carbohydrate intake levels (8 vs. 4 g/kg BW/day).
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Affiliation(s)
| | | | | | | | - Kazushige Goto
- Graduate School of Sports and Health Science, Ritsumeikan University, Kusatsu 525-8577, Japan; (C.H.); (N.K.); (C.-A.L.); (F.W.)
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Manzi V, Savoia C, Padua E, Edriss S, Iellamo F, Caminiti G, Annino G. Exploring the interplay between metabolic power and equivalent distance in training games and official matches in soccer: a machine learning approach. Front Physiol 2023; 14:1230912. [PMID: 37942227 PMCID: PMC10628509 DOI: 10.3389/fphys.2023.1230912] [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: 05/29/2023] [Accepted: 10/10/2023] [Indexed: 11/10/2023] Open
Abstract
Introduction: This study aimed to explore the interplay between metabolic power (MP) and equivalent distance (ED) and their respective roles in training games (TGs) and official soccer matches. Furthermore, the secondary objective was to investigate the connection between external training load (ETL), determined by the interplay of metabolic power and equivalent distance, and internal training load (ITL) assessed through HR-based methods, serving as a measure of criterion validity. Methods: Twenty-one elite professional male soccer players participated in the study. Players were monitored during 11 months of full training and overall official matches. The study used a dataset of 4269 training games and 380 official matches split into training and test sets. In terms of machine learning methods, the study applied several techniques, including K-Nearest Neighbors, Decision Tree, Random Forest, and Support-Vector Machine classifiers. The dataset was divided into two subsets: a training set used for model training and a test set used for evaluation. Results: Based on metabolic power and equivalent distance, the study successfully employed four machine learning methods to accurately distinguish between the two types of soccer activities: TGs and official matches. The area under the curve (AUC) values ranged from 0.90 to 0.96, demonstrating high discriminatory power, with accuracy levels ranging from 0.89 to 0.98. Furthermore, the significant correlations observed between Edwards' training load (TL) and TL calculated from metabolic power metrics confirm the validity of these variables in assessing external training load in soccer. The correlation coefficients (r values) ranged from 0.59 to 0.87, all reaching statistical significance at p < 0.001. Discussion: These results underscore the critical importance of investigating the interaction between metabolic power and equivalent distance in soccer. While the overall intensity may appear similar between TGs and official matches, it is evident that underlying factors contributing to this intensity differ significantly. This highlights the necessity for more comprehensive analyses of the specific elements influencing physical effort during these activities. By addressing this fundamental aspect, this study contributes valuable insights to the field of sports science, aiding in the development of tailored training programs and strategies that can optimize player performance and reduce the risk of injuries in elite soccer.
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Affiliation(s)
- Vincenzo Manzi
- Department of Humanities Science, Pegaso Open University, Naples, Italy
| | - Cristian Savoia
- The Research Institute for Sport and Exercise Sciences, The Tom Reilly Building, Liverpool John Moores University, Liverpool, England, United Kingdom
- Federazione Italiana Giuoco Calcio (F.I.G.C.), Rome, Italy
| | - Elvira Padua
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy
| | - Saeid Edriss
- Sport Engineering Lab, Department Industrial Engineering, University of Rome “Tor Vergata”, Rome, Italy
| | - Ferdinando Iellamo
- Department of Rehabilitation Cardiology, IRCCS San Raffaele Pisana, Rome, Italy
- Department of Clinical Science and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Giuseppe Caminiti
- Department of Rehabilitation Cardiology, IRCCS San Raffaele Pisana, Rome, Italy
| | - Giuseppe Annino
- Sport Engineering Lab, Department Industrial Engineering, University of Rome “Tor Vergata”, Rome, Italy
- Centre of Space Bio-Medicine, Department of Systems Medicine, Faculty of Medicine and Surgery, University of Rome “Tor Vergata”, Rome, Italy
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Kryściak J, Tomczak M, Podgórski T, Chmura P, Konefał M, Chmura J, Maly T, Modric T, Andrzejewski M. Temporal changes in intensity and volume of external training loads during a 1 × 1 short-bout, small-sided games in elite youth soccer players. Sci Rep 2023; 13:17892. [PMID: 37857842 PMCID: PMC10587065 DOI: 10.1038/s41598-023-45277-y] [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: 04/13/2023] [Accepted: 10/18/2023] [Indexed: 10/21/2023] Open
Abstract
This study compared external training load (ETL) and its temporal changes across repetitions during a speed endurance production (SEP) training comprised of 1 × 1 short-bout, small-sided games (SSGs) in elite youth soccer players. Twenty U18 players were divided into two groups (SEP1 and SEP2) performing six 30 s and 45 s bouts of SSG (work-to-rest ratio 1:4) on a 10 by 15 m field. ETL was characterized by the total distance covered, Player Load, the total number of accelerations/decelerations, and their relative values (per minute). Significant overall decreases in the ETL parameter values across six repetitions in both SSG groups were observed relative to the measurement in the first set beginning in 3rd (SEP1) or 4th (SEP2) repetitions. Significant greater decreases in Player Load (F(5.90) = 2.99, p < 0.05, η P2 = 0.14), Player Load per minute (F(5,90) = 11.32, p < 0.001, η P2 = 0.39), total distance per minute (F(3.43,61.73) = 7.72, p < 0.001, η P2 = 0.30) and accelerations per minute (F(5,90) = 2.59, p < 0.05, η P2 = 0.13) were observed in the 30-s games than in the 45-s games. In conclusion, the use of SSGs in SEP training is associated with a decrease in the effectiveness of physical work performed across repetitions. In practice, due to the decrease in the measured ETL indicators already in the 3rd or 4th repetition (especially in the SEP1 group), the work-to-rest ratio could be increased from the applied 1:4 to 1:6.
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Affiliation(s)
- Jakub Kryściak
- Department of Physiology and Biochemistry, Poznań University of Physical Education, 61-871, Poznan, Poland.
| | - Maciej Tomczak
- Department of Psychology, Poznań University of Physical Education, 61-871, Poznan, Poland
| | - Tomasz Podgórski
- Department of Physiology and Biochemistry, Poznań University of Physical Education, 61-871, Poznan, Poland
| | - Paweł Chmura
- Department of Team Games, Wroclaw University of Health and Sport Sciences, 51-612, Wrocław, Poland
| | - Marek Konefał
- Department of Biological and Motor Sport Bases, Wroclaw University of Health and Sport Sciences, 51-612, Wrocław, Poland
| | - Jan Chmura
- Department of Biological and Motor Sport Bases, Wroclaw University of Health and Sport Sciences, 51-612, Wrocław, Poland
| | - Tomas Maly
- Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Toni Modric
- Faculty of Kinesiology, University of Split, 21000, Split, Croatia
| | - Marcin Andrzejewski
- Department of Methodology of Recreation, Poznań University of Physical Education, 61-871, Poznan, Poland
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Yildirim UC, Akcay N, Alexe DI, Esen O, Gulu M, Cîrtiţă-Buzoianu C, Cinarli FS, Cojocaru M, Sari C, Alexe CI, Karayigit R. Acute effect of different doses of caffeinated chewing gum on exercise performance in caffeine-habituated male soccer players. Front Nutr 2023; 10:1251740. [PMID: 37920289 PMCID: PMC10619147 DOI: 10.3389/fnut.2023.1251740] [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: 07/02/2023] [Accepted: 09/15/2023] [Indexed: 11/04/2023] Open
Abstract
The ergogenic benefits of caffeine have been well established, but there is scarce research on its chewing gum form. The present research aimed to examine the effects of different doses (100 and 200 mg) of caffeinated chewing gum on muscle strength, vertical jump performance, and ball-kicking speed in trained male soccer players. In a double-blind, randomized counterbalanced, and crossover research design, 14 male soccer players (age = 22 ± 2 y; body mass = 74.2 ± 7.1 kg; height = 180.0 ± 6.8 cm; habitual caffeine intake = 358.9 ± 292.4 mg/day) participated in three experimental trials. In each trial, participants performed isometric handgrip strength, quadriceps and hamstring strength, ball-kicking speed, and 15 s countermovement jump test 10 min after chewing 100 mg (LCAF) or 200 mg (MCAF) of caffeinated gum or placebo (PLA). MCAF improved quadriceps strength (53.77 ± 5.77 kg) compared to LCAF (49.62 ± 8.81 kg, p = 0.048) and PLA (49.20 ± 7.20 kg, p = 0.032). However, neither LCAF nor MCAF had a significant effect on the isometric handgrip and hamstring strength, ball-kicking speed, and 15 s countermovement jump test (all p > 0.05). These findings support chewing gum as an alternative mode of caffeine administration which can be used as a nutritional ergogenic aid for trained soccer players, at least for quadriceps strength.
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Affiliation(s)
| | - Neslihan Akcay
- Hasan Doğan School of Physical Education and Sports, Karabük University, Karabük, Türkiye
| | - Dan Iulian Alexe
- Department of Physical and Occupational Therapy, Faculty of Movement, Sports and Health, Sciences, Vasile Alecsandri University of Bacau, Bacău, Romania
| | - Ozcan Esen
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle upon Tyne, United Kingdom
| | - Mehmet Gulu
- Faculty of Sport Sciences, Kırıkkale University, Kırıkkale, Türkiye
| | - Cristina Cîrtiţă-Buzoianu
- Faculty of Letters, Communication and Public Relations Department, Vasile Alecsandri University of Bacau, Bacău, Romania
| | | | - Marilena Cojocaru
- Faculty of Physical Education and Sport, Spiru Haret University of Bucuresti, Bucharest, Romania
| | - Cengizhan Sari
- Faculty of Sport Sciences, Mus Alparslan University, Mus, Türkiye
| | - Cristina Ioana Alexe
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health, Sciences, Vasile Alecsandri University of Bacau, Bacau, Romania
| | - Raci Karayigit
- Faculty of Sport Sciences, Ankara University, Ankara, Türkiye
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Manouras N, Batatolis C, Ioakimidis P, Karatrantou K, Gerodimos V. The Reliability of Linear Speed with and without Ball Possession of Pubertal Soccer Players. J Funct Morphol Kinesiol 2023; 8:147. [PMID: 37873906 PMCID: PMC10594421 DOI: 10.3390/jfmk8040147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/07/2023] [Accepted: 10/11/2023] [Indexed: 10/25/2023] Open
Abstract
Reliable fitness tests with low day-to-day and trial-to-trial variation are a prerequisite for tracking a player's performance or for identifying meaningful changes in training interventions. The present study examined the inter- and intra-session reliability of 30 m linear speed with and without ball possession as well as the reliability of a specific performance index of pubertal soccer players. A total of 40 pubertal (14.87 ± 1.23 years old) male soccer players performed two testing sessions (test-retest) separated by 72 h. Both testing sessions included a protocol consisting of two maximal trials of 30 m linear speed with and without ball possession. A performance index, indicating the difference between the two speed tests, was also calculated using two different equations (delta value and percentage value). The relative and absolute inter-session reliabilities were good/high for all testing variables (ICC = 0.957-0.995; SEM% = 0.62-8.83). There were also good/high relative and absolute intra-session reliabilities observed for all testing variables (ICC = 0.974-0.987; SEM% = 1.26-6.70%). According to the Bland-Altman plots, the differences between test-retest and trials for all observations were within the defined 95% limits of agreement. The reliable testing protocols and performance index for the evaluation of linear speed with and without ball possession, observed in this study, may be used in speed monitoring and training planning of pubertal soccer players.
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Affiliation(s)
| | | | | | | | - Vassilis Gerodimos
- Department of Physical Education and Sports Science, University of Thessaly, 42100 Trikala, Greece
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43
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Callis L, Russell M, Hurst H, Hardwicke J, Roberts CJ. Room for Improvement in Sports Nutrition Knowledge amongst Parents and Caregivers of Male Academy Soccer Players in the UK: A Cross-Sectional Study. Nutrients 2023; 15:4331. [PMID: 37892407 PMCID: PMC10609980 DOI: 10.3390/nu15204331] [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: 09/08/2023] [Revised: 10/06/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
In professional soccer clubs in the UK, nutrition support is often polarised towards senior players or those in the senior academy age groups seeking first team selection/involvement. Accordingly, there is an increased reliance on parents and caregivers to provide support regarding nutritional intake. Therefore, the aim of this study was to evaluate the quality of nutrition knowledge of parents and caregivers of male youth soccer players within developmental academies in the UK. Across a single competitive season, 360 registered parents and caregivers of male soccer players from English Premier League under 9-11 (Foundation Phase) and under 12-16 (Youth Development Phase) age group academies completed an online version of the 88-item validated Nutrition for Sport Knowledge Questionnaire. Nutrition knowledge scores were classified as "poor" (43 ± 23%). Nutrition knowledge scores were significantly greater in respondents with dependents representing Category 1 (45 ± 13%) vs. Category 2 (39 ± 15%) academies and in Foundation Phase (44 ± 13%) vs. Youth Development Phase (41 ± 15%). These results demonstrate that there is room for improvement in the nutrition knowledge levels of parents and caregivers of male soccer academy players. We recommend that club academies provide appropriate resources towards nutritional education for parents and caregivers.
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Affiliation(s)
- Luke Callis
- Faculty of Arts, Science and Technology, University of Northampton, Northampton NN1 5PH, UK;
| | - Mark Russell
- School of Sport and Wellbeing, Leeds Trinity University, Leeds LS18 5HD, UK;
| | - Howard Hurst
- Centre for Applied Sport Physical Activity and Performance, University of Central Lancashire, Preston PR1 2HE, UK;
| | - Jack Hardwicke
- Department of Sport Science, Nottingham Trent University, Nottingham NG11 8NS, UK;
| | - Charlie Jon Roberts
- Faculty of Arts, Science and Technology, University of Northampton, Northampton NN1 5PH, UK;
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44
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Sebastiá-Rico J, Soriano JM, Sanchis-Chordà J, Alonso-Calvar M, López-Mateu P, Romero-García D, Martínez-Sanz JM. Dietary Habits of Elite Soccer Players: Variations According to Competitive Level, Playing Position and Sex. Nutrients 2023; 15:4323. [PMID: 37892399 PMCID: PMC10609682 DOI: 10.3390/nu15204323] [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: 08/31/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
Soccer is a sport practiced worldwide by both men and women, where nutrition plays a fundamental role in the performance of soccer players, providing them with the nutrients necessary for energy, muscle recovery and injury prevention. The aim of this study is to describe the dietary habits in elite soccer players and their association with their competitive level, playing position and sex. A descriptive and non-experimental comparative study was conducted during the 2021-2022 competitive season. A total of 105 players belonging to a Spanish elite soccer team completed a food frequency questionnaire (FCFQ). It was observed that male players presented a higher consumption of carbohydrate-rich foods (p < 0.05), fermented foods (p = 0.014), frozen foods (p = 0.049) and red meat (p = 0.012) compared to female players, with the exception of lean meats, which were higher in females (p = 0.012). Furthermore, the U16-15 categories stand out for consuming carbohydrate-rich foods such as pasta (p = 0.000), bread (p = 0.004) and sweets (p = 0.046), as well as frozen foods (p = 0.002). Finally, alcohol consumption is higher in the senior categories (42.9%), where men are more likely to drink mixed drinks (6.2%), and beer and wine by women (10.7%). Practically no differences were found between the playing positions. In conclusion, differences were found in FCFQ according to competitive level and sex.
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Affiliation(s)
- Jaime Sebastiá-Rico
- Area of Nutrition, University Clinic of Nutrition, Physical Activity and Physiotherapy (CUNAFF), Lluís Alcanyís Foundation—University of Valencia, 46020 Valencia, Spain;
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
| | - Jose M. Soriano
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
- Joint Research Unit of Endocrinology, Nutrition and Clinical Dietetics, Health Research Institute La Fe—University of Valencia, 46026 Valencia, Spain
| | | | - Miguel Alonso-Calvar
- Area of High Conditional Performance, Academia Valencia CF SAD, 46980 Paterna, Spain
| | - Pedro López-Mateu
- Area of Medical Services, Academia Valencia CF SAD, 46980 Paterna, Spain
| | - David Romero-García
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
| | - José Miguel Martínez-Sanz
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Nursing Department, Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain
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45
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Gray A, Andrews M, Waldron M, Jenkins D. A model for calculating the mechanical demands of overground running. Sports Biomech 2023; 22:1256-1277. [PMID: 32951525 DOI: 10.1080/14763141.2020.1795238] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 07/04/2020] [Indexed: 01/12/2023]
Abstract
An energy-based approach to quantifying the mechanical demands of overground, constant velocity and/or intermittent running patterns is presented. Total mechanical work done (Wtotal) is determined from the sum of the four sub components: work done to accelerate the centre of mass horizontally (Whor), vertically (Wvert), to overcome air resistance (Wair) and to swing the limbs (Wlimbs). These components are determined from established relationships between running velocity and running kinematics; and the application of work-energy theorem. The model was applied to constant velocity running (2-9 m/s), a hard acceleration event and a hard deceleration event. The estimated Wtotal and each sub component were presented as mechanical demand (work per unit distance) and power (work per unit time), for each running pattern. The analyses demonstrate the model is able to produce estimates that: 1) are principally determined by the absolute running velocity and/or acceleration; and 2) can be attributed to different mechanical demands given the nature of the running bout. Notably, the proposed model is responsive to varied running patterns, producing data that are consistent with established human locomotion theory; demonstrating sound construct validity. Notwithstanding several assumptions, the model may be applied to quantify overground running demands on flat surfaces.
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Affiliation(s)
- Adrian Gray
- School of Science and Technology, University of New England, Armidale, Australia
| | - Mark Andrews
- Queensland Government, Queensland Academy of Sport, Nathan, QLD, Australia
| | - Mark Waldron
- School of Science and Technology, University of New England, Armidale, Australia
- College of Engineering, Swansea University, Swansea, UK
| | - David Jenkins
- School of Human Movement and Nutrition Sciences, University of Queensland, St Lucia, QLD, Australia
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Alanen AM, Gibson ES, Critchley M, Benson LC, Jordan MJ, Ferber R, Pasanen K. Differences in Situational Patterns During Change of Direction Movements Greater than 90° in Youth Male and Female Soccer Players. J Hum Kinet 2023; 89:149-160. [PMID: 38053945 PMCID: PMC10694721 DOI: 10.5114/jhk/169524] [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: 01/31/2023] [Accepted: 06/22/2023] [Indexed: 12/07/2023] Open
Abstract
Change of direction (COD) maneuvers in soccer create tactical advantages, but also expose the player to an increased risk of injury. COD ability is commonly tested with pre-planned drills including cuts greater than 90°. These tests do not take into consideration positional differences players encounter during games. This case-series study used principal component analysis (PCA) to examine situational differences during COD movements between playing positions in youth soccer games. For each of the four teams included (26 females, 27 males), one game was analyzed using video-analysis. Two independent reviewers identified situational patterns and a PCA was used to examine differences between playing positions. Three principal components explained 89% of the variation in the data and were categorized as the total quantity of CODs, attacking/goal-scoring and defensive reacting types of CODs. One-way ANOVA on the individual principal component (PC) scores showed significant differences (p < 0.05) between centre midfielders, goalkeepers, and centrebacks in the quantity of CODs (PC1), and between wingers and fullbacks and centre backs in attacking/goal-scoring CODs (PC2), whereas PC3 was not different between playing positions. Differences between playing positions suggest that training and testing protocols in soccer could be enhanced to better match the individual and playing position-based needs.
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Affiliation(s)
- Aki-Matti Alanen
- Integrative Neuromuscular Sport Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Sport Injury Prevention Research Center, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Eric S. Gibson
- Integrative Neuromuscular Sport Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Sport Injury Prevention Research Center, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Meghan Critchley
- Sport Injury Prevention Research Center, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Lauren C. Benson
- Sport Injury Prevention Research Center, Faculty of Kinesiology, University of Calgary, Calgary, Canada
- Tonal Strength Institute, San Francisco, USA
| | - Matthew J. Jordan
- Integrative Neuromuscular Sport Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Faculty of Kinesiology, University of Calgary, Calgary, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Canada
| | - Reed Ferber
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Canada
- Running Injury Clinic, Calgary, Canada
- Faculty of Nursing, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Kati Pasanen
- Integrative Neuromuscular Sport Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Sport Injury Prevention Research Center, Faculty of Kinesiology, University of Calgary, Calgary, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
- Tampere Research Center of Sports Medicine, UKK Institute, Tampere, Finland
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47
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Bulgay C, Cepicka L, Dalip M, Yıldırım S, Ceylan Hİ, Yılmaz ÖÖ, Ulucan K, Badicu G, Cerit M. The relationships between ACTN3 rs1815739 and PPARA-α rs4253778 gene polymorphisms and athletic performance characteristics in professional soccer players. BMC Sports Sci Med Rehabil 2023; 15:121. [PMID: 37749582 PMCID: PMC10518950 DOI: 10.1186/s13102-023-00733-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/13/2023] [Indexed: 09/27/2023]
Abstract
BACKGROUND Current research on athletic performance focuses on genetic variants that contribute significantly to individuals' performance. ACTN3 rs1815739 and PPARA-α rs4253778 gene polymorphisms are variants frequently associated with athletic performance among different populations. However, there is limited research examining the pre-and post-test results of some variants of athletic performance in soccer players. Therefore, the presented research is to examine the relationships between the ACTN3 rs1815739 and PPARA-α rs4253778 gene polymorphisms and athletic performance improvement rates in adaptations to six weeks of training in elite soccer players using some athletic performance tests. METHODOLOGY Twenty-two soccer players between the ages of 18 and 35 voluntarily participated in the study. All participants were actively engaged in a rigorous six-day-a-week training program during the pre-season preparation period. Preceding and following the training program, a battery of diverse athletic performance tests was administered to the participants. Moreover, Genomic DNA was extracted from oral epithelial cells using the Invitrogen DNA isolation kit (Invitrogen, USA), following the manufacturer's protocol. Genotyping was conducted using real-time PCR. To assess the pre- and post-test performance differences of soccer players, the Wilcoxon Signed Rank test was employed. RESULTS Upon analyzing the results of the soccer players based on the ACTN3 genotype variable, it was observed that there were no statistically significant differences in the SJ (Squat Jump), 30m sprint, CMJ (Counter Movement Jump), and DJ (Drop Jump) performance tests (p > 0.05). However, a statistically significant difference was identified in the YOYO IRT 2 (Yo-Yo Intermittent Recovery Test Level 2) and 1RM (One Repetition Maximum) test outcomes (YOYO IRT 2: CC, CT, and TT, p = 0.028, 0.028, 0.008, 0.000, respectively; 1RM: CC, CT, and TT, p = 0.010, 0.34, 0.001, respectively). Regarding the PPARA-α genotype variable, the statistical analysis revealed no significant differences in the SJ, 30m sprint, CMJ, and DJ performance tests (p > 0.05). Nevertheless, a statistically significant difference was observed in the YOYO IRT 2 and 1RM test results (YOYO IRT 2: CC, CG p = 0.001, 0.020; 1RM: CC, p = 0.000) CONCLUSIONS: The current study demonstrated significant enhancements in only YOYO INT 2 and 1RM test outcomes across nearly all gene variants following the six-day-a-week training program. Other performance tests, such as the 30m sprint, SJ, CMJ, and DJ tests did not exhibit statistically significant differences. These findings contribute novel insights into the molecular processes involving PPARA-α rs4253778 and ACTN3 rs1815739 that underpin enhancements in endurance (YOYO INT 2) and maximal strength (1RM) aspects of athletic performance. However, to comprehensively elucidate the mechanisms responsible for the association between these polymorphisms and athletic performance, further investigations are warranted. It is thought that the use of field and genetic analyses together to support each other will be an important detail for athletes to reach high performance.
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Affiliation(s)
- Celal Bulgay
- Sports Science Faculty, Bingol University, Bingöl, 12000 Türkiye
| | - Ladislav Cepicka
- Department of Physical Education and Sport, Faculty of Education, University of West Bohemia, Pilsen, 30100 Czech Republic
| | - Metin Dalip
- Faculty of Physical Culture and Health, University in Tetovo, Tetova, 1200 Republic of North Macedonia
| | - Selin Yıldırım
- Sports Science Faculty, Lokman Hekim University, Ankara, 06510 Türkiye
| | - Halil İ. Ceylan
- Kazim Karabekir Faculty of Education, Ataturk University, Erzurum, 25240 Türkiye
| | - Özlem Ö. Yılmaz
- Institute of Health Sciences Marmara University, İstanbul, 34722 Türkiye
| | - Korkut Ulucan
- Department of Medical Biology and Genetics, Marmara University, İstanbul, 34722 Türkiye
| | - Georgian Badicu
- Faculty of Physical Education and Mountain Sports, Transilvania University of Braşov, Brasov, 500068 Romania
| | - Mesut Cerit
- Sports Science Faculty, Lokman Hekim University, Ankara, 06510 Türkiye
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48
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Fleming A, Walker M, Armitage M, Connor M, Beato M. A Comparison of Training and Match Play External Load During a Congested In-Season Period in English League 2 Football. J Strength Cond Res 2023; 37:e527-e534. [PMID: 37184969 DOI: 10.1519/jsc.0000000000004458] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
ABSTRACT Fleming, A, Walker, M, Armitage, M, Connor, M, and Beato, M. A comparison of training and match play external load during a congested in-season period in English League 2 Football. J Strength Cond Res 37(9): e527-e534, 2023-This study aimed to investigate if external training load metrics differ between training days and match day (MD) during a period of fixture congestion and to verify if external load metrics vary based on playing positions. Training and MD data were collected in a part of the competition phase of the 2020-2021 season (6 weeks) in the English Football League 2 ( N = 20 players, mean ± SD s: age = 24.4 ± 4.7 years). Global Navigation Satellite System units (Catapult S7 Vector 10 Hz) were used to monitor external load metrics. The metrics were duration of training, total distance (TD), high-speed running distance (HSR), sprinting distance, relative intensity (m/min), total accelerations (TotAcc) (>3 m·s -2 ), and total decelerations (TotDec) (<-3 m·s -2 ). This study found that duration, TD, relative intensity, HSR distance, sprint distance, TotAcc, and TotDec were different ( p < 0.001, d = small to moderate ) between MD and match day minus two (MD-2) or match day minus one (MD-1); however, during match day minus four (MD-4), only relative intensity was significantly lower ( p < 0.001) compared with MD output. Therefore, MD-4 was the most demanding training session of the week (after the MD), and during MD-2 and MD-1, coaches decreased players' load to favor players' readiness. Moreover, this study found that MD and MD-1 resulted in statistically different values across several metrics between different playing positions (defenders < midfielders and strikers), whereas metrics in MD-4 and MD-2 were not statistically different, which highlights that in these sessions, players have similar external loads independently from their playing positions.
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Affiliation(s)
- Adam Fleming
- Sport Science Department at Cambridge United Football Club, Cambridge, United Kingdom
| | - Matthew Walker
- Sport Science Department at Cambridge United Football Club, Cambridge, United Kingdom
| | - Mark Armitage
- Performance Services Department Norwich City Football Club, Norwich, United Kingdom
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom; and
| | - Mark Connor
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom; and
- Natural Computing Research and Applications Group, School of Business, University College Dublin, Ireland
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom; and
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49
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Selmi W, Hammami R, Kasmi S, Sehli S, Rebai H, Duncan M, Chtara M, Granacher U. Effects of Aerobic and Speed Training Versus Active Control on Repeated Sprint Ability and Measures of Self-confidence and Anxiety in Highly Trained Male Soccer Players. SPORTS MEDICINE - OPEN 2023; 9:63. [PMID: 37498373 PMCID: PMC10374512 DOI: 10.1186/s40798-023-00619-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 07/19/2023] [Indexed: 07/28/2023]
Abstract
BACKGROUND While there is ample evidence on the effects of single-mode aerobic and speed training on physical fitness in soccer players, less is known on the combined effects of these exercise regimens on physical and psychological factors. AIM This study aimed to compare the effects of aerobic and speed training with soccer-specific training versus soccer-specific training only on aerobic performance during the YOYO intermittent fitness test level 1 (final velocity, total distance [TD], maximal oxygen consumption [VO2max]), repeated sprint ability (best, total sprint time [RSABT, RSATT], sprint decrement [RSA dec]) performance and somatic anxiety (SA), cognitive anxiety (CA), and self-confidence (SC) adaptations in soccer players. METHODS Thirty-eight highly trained male athletes aged 18.9 ± 0.5 years were randomly assigned to an aerobic and speed training group (COMB-G; n = 20) or an active control group (CON-G; n = 18). Aerobic training comprised intermittent exercises at 110-120% of the final velocity achieved at the end of the YOYO IL1 test. Speed training involved maximal sprints over 15-20-m with 5-6 sets per session. Aerobic or speed training lasted 20 min per session and replaced parts of the soccer-specific training. CON-G performed the soccer-specific training including technical, tactical drills and small-sided games. Training volume was similar between groups. Pre, post intervention, all participants performed a repeated-sprint ability (RSA) test, the YO-YO IL1 test and the players completed a Competitive Scale Anxiety Inventory (CSAI-2). RESULTS A two (group: COMB-G, CON-G) by two (time: pre, post) mixed ANOVA (group-by-time) was computed. Significant group-by-time interactions were found for RSATT (F = 117.3; p < 0.001; Pη2 = 1.78), RSABT (F = 82.4; p < 0.001; Pη2 = 1.53), final velocity (F = 85.8; p < 0.001; Pη2 = 1.53), TD (F = 87.1; p < 0.001; Pη2 = 1.56), and VO2max (F = 18.0; p < 0.001; Pη2 = 0.72). In addition, significant group-by-time interactions were observed for SC (F = 90.2; p < 0.001; d = 1.60), SA (F = 60.5; p < 0.001; Pη2 = 1.70), and CA (F = 20.7; p < 0.001; Pη2 = 0.75). Post-hoc analyses indicated significant improvements for all dependent variables from pre- to post-training in favor of COMB-G. CONCLUSION Aerobic and speed training in combination with soccer-specific training is a safe and effective training method as it exerts positive effects not only for physical fitness but also for self-confidence and the coping of anxiety in male soccer players.
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Affiliation(s)
- Walid Selmi
- Higher Institute of Sport and Physical Education of Ksar Said, Manouba University, Tunis, Tunisia
- Research Laboratory (LR23JS01) "Sport Performance, Health and Society", Higher Institute of Sport and Physical Education of Ksar-Said, Manouba University, Tunis, Tunisia
| | - Raouf Hammami
- Higher Institute of Sport and Physical Education of Ksar Said, Manouba University, Tunis, Tunisia
- Tunisian Research Laboratory 'Sports Performance Optimization' (CNMSS-LR09SEP01), National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Sofien Kasmi
- Higher Institute of Sport and Physical Education of Ksar Said, Manouba University, Tunis, Tunisia
- Tunisian Research Laboratory 'Sports Performance Optimization' (CNMSS-LR09SEP01), National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Sonia Sehli
- Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Laboratory: Education Motor Skill Sports and Health (LR19JS01), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Haithem Rebai
- Tunisian Research Laboratory 'Sports Performance Optimization' (CNMSS-LR09SEP01), National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Michael Duncan
- Centre for Sport, Exercise and Life Sciences, Coventry University, Coventry, UK
| | - Mokhtar Chtara
- Tunisian Research Laboratory 'Sports Performance Optimization' (CNMSS-LR09SEP01), National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Urs Granacher
- Department of Sport and Sport Science, Exercise and Human Movement Science, University of Freiburg, Freiburg, Germany.
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50
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Muracki J, Nowak M, Kawczyński A, Silva AF, Clemente FM. Match running performance profiles of amputee football players at the national level. Sci Rep 2023; 13:9882. [PMID: 37337014 DOI: 10.1038/s41598-023-36856-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 06/11/2023] [Indexed: 06/21/2023] Open
Abstract
Even though running performance and positional profiles in football are well described, amputee football (AF) has different characteristics of the movement, pitch dimensions, and time played. There is a gap in the scientific literature about positional profiles based on running performance in AF. This study aimed to investigate the differences between positions, the influence of the amputation level or defect of the lower limb (LD), the differences in running performance between halves, and the relationship with the final match result. Thirteen AF National Team players were monitored by Global Navigation Satellite System (GNSS), tracking 24 official international matches for 17 months. Values of top speed, peak acceleration, peak deceleration, average distance per minute, sprint mean speed, GPS load per minute, inertial load per minute (Gs load/min), number of sprints per minute, and a number of impacts per minute were analyzed for defenders (DEF), midfielders (MID) and forwards (FOR). Additional factors analyzed were amputation level (below the knee, low amputation-LA or over the knee, high amputation-HA or defect of the lower limb-LD) and the match's final result. Midfielders had significantly higher running performance parameters compared to other positions (greater top speed than DEF (+ 0.3 m/s; p < 0.001) and FOR (+ 0.2 m/s; p = 0.045), greater peak acceleration and deceleration than DEF (+ 0.5 m/s2 for both measures; p < 0.001) and FOR (+ 0.4 and + 0.3 m/s2; p < 0.001 and p = 0.036, respectively), greater GPS load/minute than DEF (+ 0.2 load/min; p = 0.001) and FOR (+ 0.3 load/min; p < 0.001), greater Gs load per minute than DEF (+ 2.7 load/min; p < 0.001) and FOR (+ 1.8 load/min; p < 0.001), greater number of impacts per minute than DEF (+ 0.2 n/min; p < 0.001) and FOR (+ 0.2 n/min; p < 0.001). Players with LD had significantly higher running performance than those with LA or HA. In the match's second half, a decrease in running performance was registered. The trend of running more when losing could be observed-AF players had higher running parameters in lost matches, but the differences were not statistically significant. Further research complied with contextual game analysis is needed to assess the running performance of AF players deeply.
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Affiliation(s)
- Jarosław Muracki
- Institute of Physical Culture Sciences, Faculty of Health and Physical Education, University of Szczecin, 70-453, Szczecin, Poland.
| | - Michał Nowak
- Collegium Medicum Dr.Władysław Biegański, Department of Physical Culture Sciences, Jan Długosz University in Częstochowa, 42-200, Częstochowa, Poland
| | - Adam Kawczyński
- Gdańsk University of Physical Education and Sport, Poland, 80-336, Gdańsk, Poland
| | - Ana Filipa Silva
- Instituto Politécnico de Viana do Castelo, Escola Superior Desporto e Lazer, Rua Escola Industrial e Comercial de Nun'Álvares, 4900-347, Viana do Castelo, Portugal
- Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), 4960-320, Melgaço, Portugal
- Research Centre in Sport Sciences, Health Sciences and Human Development (CIDESD), Quinta de Prados, Edifício Ciências de Desporto, 5001-801, Vila Real, Portugal
| | - Filipe Manuel Clemente
- Instituto Politécnico de Viana do Castelo, Escola Superior Desporto e Lazer, Rua Escola Industrial e Comercial de Nun'Álvares, 4900-347, Viana do Castelo, Portugal
- Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), 4960-320, Melgaço, Portugal
- Instituto de Telecomunicações, Delegação da Covilhã, 1049-001, Lisbon, Portugal
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