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Selmi MA, Ceylan HI, Hammami R, Sassi RH, González-Fernández FT, Morgans R, Bragazzi NL. Repeated-sprint sets test: a new method for evaluating and forecasting fitness in elite young male soccer players. Sci Rep 2024; 14:8542. [PMID: 38609417 PMCID: PMC11014943 DOI: 10.1038/s41598-024-58974-z] [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: 08/16/2023] [Accepted: 04/05/2024] [Indexed: 04/14/2024] Open
Abstract
The objective of the current study was to explore the correlation between repeated sprint sets (RSS) ability and several physical attributes, including maximum sprint speed, maximal aerobic speed, maximal anaerobic speed, aerobic capacity, and explosive strength. Moreover, the aim was to assess the suitability of RSS as a comprehensive evaluation tool for physical qualities and to determine which physical field tests most accurately predict RSS in elite young male soccer players. A total of thirty-two young elite male soccer players (mean age 14.6 ± 0.3 years; predicted years from peak height velocity (PHV): - 0.4 ± 0.3; years in training: 3.7 ± 0.5) voluntarily participated in the study. The players participated in eight consecutive specific physical tests, with a minimum 72-h recovery between each session to minimize the impact of fatigue during the second trial. The participants completed the tests in the following order: RSS test, Vam-Eval test, a constant velocity test performed until exhaustion at 100% of vVO2max (tlim100), 20-m Multi-Stage Shuttle Run test (VMSRT), Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), Maximal Anaerobic Shuttle Running Test (VMASRT), Maximal Sprinting Speed Test (20-m flying sprint), Countermovement Jump (CMJ), and Standing Long Jump test (SLJ). The results of the study showed that there were very large negative correlations between tlim100 and SST (sum of sprint times), and large negative correlations between Yo-Yo IR1, Vam-Eval, and SST during RSS in young elite male soccer players (p < 0.05). Additionally, VMASRT and SLJ demonstrated a moderate negative correlation with SST (p < 0.05). In contrast, significant positive correlations were found between 20-m flying sprint and the SST (p < 0.05). According to the stepwise multiple linear regression analysis, the primary predictors of SST, ranked by importance, were tlim100 and Yo-Yo IR1. These two predictors collectively accounted for 72% of the variance in players' SST (p < 0.0001). Due to the importance of aerobic capacity and short repeated accelerations/sprint sets for overall competitive performance in soccer, in conclusion, our results suggest that elite young male soccer players should perform both high intensity interval training and aeorobic capactity exercises as part of soccer training if the primary outcome is to improve repeated sprint ability performance.
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Affiliation(s)
- Mohamed Amin Selmi
- Higher Institute of Sport and Physical Education of Ksar-Said, Manouba University, Tunis, Tunisia
- Tunisian Research Laboratory 'Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Halil Ibrahim Ceylan
- Physical Education and Sports Teaching Department, Kazim Karabekir Faculty of Education, Ataturk University, 25240, Erzurum, Turkey.
| | - Raouf Hammami
- Higher Institute of Sport and Physical Education of Ksar-Said, Manouba University, Tunis, Tunisia
- Tunisian Research Laboratory 'Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - Radhouane Haj Sassi
- Tunisian Research Laboratory 'Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | | | - Ryland Morgans
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Nicola Luigi Bragazzi
- Laboratory for Industrial and Applied Mathematics (LIAM), Department of Mathematics and Statistics, York University, Toronto, Canada.
- Human Nutrition Unit (HNU), Department of Food and Drugs, Medical School, University of Parma, Building C, Via Volturno, 39, 43125, Parma, Italy.
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Tortu E, Hazir T, Kin-Isler A. Energy System Contributions in Repeated Sprint Tests: Protocol and Sex Comparison. J Hum Kinet 2024; 92:87-98. [PMID: 38736607 PMCID: PMC11079935 DOI: 10.5114/jhk/175862] [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: 04/26/2023] [Accepted: 11/25/2023] [Indexed: 05/14/2024] Open
Abstract
The aim of this study was to investigate the energy system contributions to different repeated sprint protocols and also to determine sex-related differences in these contributions. Sixteen men and fourteen women team sport athletes randomly performed two cycling repeated sprint protocols with the same total duration (10 x 6 s and 6 x 10 s). Relative peak power (RPP), relative mean power (RMP), performance decrement (PD), oxygen uptake (VO2), blood lactate (LA), heart rate (HR) and ratings of perceived exertion (RPEs) were measured. The contributions of energy systems were calculated from oxygen consumption and lactate values during rest, exercise and recovery phases based on mathematical methods. Findings indicate that men had higher RPP and RMP. RPP did not differ according to protocols, while RMP was higher in the 10 x 6 s protocol. The sex effect in PD was similar; however, it was higher in the 6 x 10 s protocol. The effects of protocols on the maximum HR and LA were similar; however, the 6 x 10 s protocol resulted in higher RPEs. In both protocols women had higher ATP-PCr and men had higher glycolytic system contribution with similar oxidative system contribution. In addition, the 10 x 6 s protocol had higher ATP-PCr system contribution and the 6 x 10 s protocol had higher glycolytic system and oxidative system contributions. In conclusion, the contribution of energy systems, physiological and performance variables showed variations according to sex and different protocols.
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Affiliation(s)
- Erkan Tortu
- Faculty of Sport Sciences, Department of Coaching Education, Trabzon University, Trabzon, Turkiye
| | - Tahir Hazir
- Faculty of Sport Sciences, Department of Exercise and Sport Sciences, Division of Training and Movement Sciences, Hacettepe University, Ankara, Turkiye
| | - Ayse Kin-Isler
- Faculty of Sport Sciences, Department of Exercise and Sport Sciences, Division of Training and Movement Sciences, Hacettepe University, Ankara, Turkiye
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Skoki A, Gašparović B, Ivić S, Lerga J, Štajduhar I. Building Individual Player Performance Profiles According to Pre-Game Expectations and Goal Difference in Soccer. SENSORS (BASEL, SWITZERLAND) 2024; 24:1700. [PMID: 38475238 DOI: 10.3390/s24051700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/24/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024]
Abstract
Soccer player performance is influenced by multiple unpredictable factors. During a game, score changes and pre-game expectations affect the effort exerted by players. This study used GPS wearable sensors to track players' energy expenditure in 5-min intervals, alongside recording the goal timings and the win and lose probabilities from betting sites. A mathematical model was developed that considers pre-game expectations (e.g., favorite, non-favorite), endurance, and goal difference (GD) dynamics on player effort. Particle Swarm and Nelder-Mead optimization methods were used to construct these models, both consistently converging to similar cost function values. The model outperformed baselines relying solely on mean and median power per GD. This improvement is underscored by the mean absolute error (MAE) of 396.87±61.42 and root mean squared error (RMSE) of 520.69±88.66 achieved by our model, as opposed to the B1 MAE of 429.04±84.87 and RMSE of 581.34±185.84, and B2 MAE of 421.57±95.96 and RMSE of 613.47±300.11 observed across all players in the dataset. This research offers an enhancement to the current approaches for assessing players' responses to contextual factors, particularly GD. By utilizing wearable data and contextual factors, the proposed methods have the potential to improve decision-making and deepen the understanding of individual player characteristics.
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Affiliation(s)
- Arian Skoki
- Department of Computer Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
| | - Boris Gašparović
- Department of Computer Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
| | - Stefan Ivić
- Department of Fluid Mechanics, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
| | - Jonatan Lerga
- Department of Computer Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
- Center for Artificial Intelligence and Cybersecurity, University of Rijeka, R. Matejcic 2, 51000 Rijeka, Croatia
| | - Ivan Štajduhar
- Department of Computer Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
- Center for Artificial Intelligence and Cybersecurity, University of Rijeka, R. Matejcic 2, 51000 Rijeka, Croatia
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Ruscello B, Pantanella L, Iemme P, Filetti C, Porta M, D'Ottavio S, Marcelli L, Apollaro G, Morganti G, Grossi A, Esposito M, Padua E. Temporal patterns of fatigue in repeated sprint ability testing in soccer players and acute effects of different IHRs: a comparison between genders. J Sports Med Phys Fitness 2023; 63:213-222. [PMID: 35816140 DOI: 10.23736/s0022-4707.22.13822-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Repeated sprint ability (RSA) in soccer is deemed fundamental to ensure high level of performance. The aim of this study was to investigate the acute effects of two different Initial Heart Rates (IHR) on fatigue when testing RSA in males and females' soccer players and to compare the respective patterns of fatigue. METHODS Nineteen female soccer players (age: 22.5±3.3 years, height 163.9±7.3 cm, body weight 54.3±6.4 kg, BMI 20.6±1.5 kg·m-2) and 15 male soccer players (age: 17.9±1.5 years, height 175.9±5.8 cm, body weight 68.5±9.6 kg, BMI 22.3±1.5 kg·m-2) participated in this study. HRs reached at the end of two different warm-up protocols (~90 vs. ~ 60% HR<inf>max</inf>), have been selected and the respective RSA performances were compared, within and between the groups of participants. Two sets of ten shuttle-sprints (15+15 m) with a 1:3 exercise to rest ratio with different IHR% were administered, in different days, in randomized order. To compare the different sprint performances, we employed the calculated Fatigue Index (FI%). Blood lactate concentration (BLa-) was also measured before and after testing, to compare metabolic energy. RESULTS Significant differences among trials within each set (P<0.01) were found in both genders. Differences between sets were found in male players, (Factorial ANOVA 2x5; P<0.001), not in female. BLa- after warm-up was higher in 90% vs. 60% HR<inf>max</inf> (P<0.05), in both genders but at the completion of RSA tests (after 3 minutes) the differences were not significant (P>0.05). CONCLUSIONS difference between genders were found, suggesting specific approach in testing and training RSA in soccer players.
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Affiliation(s)
- Bruno Ruscello
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele University, Rome, Italy - .,School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy - .,Department of Industrial Engineering, Faculty of Engineering, Tor Vergata University, Rome, Italy - .,LUISS SportLab, LUISS University, Rome, Italy -
| | - Laura Pantanella
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Pietro Iemme
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Cristoforo Filetti
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele University, Rome, Italy.,School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy.,Paris Saint Germain Football Club, Paris, France
| | - Marco Porta
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele University, Rome, Italy
| | - Stefano D'Ottavio
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Lorenzo Marcelli
- Department of Industrial Engineering, Faculty of Engineering, Tor Vergata University, Rome, Italy.,School of Sports and Exercise Sciences, UNICUSANO, Rome, Italy
| | - Gennaro Apollaro
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Gabriele Morganti
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Alberto Grossi
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
| | - Mario Esposito
- School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy.,LUISS SportLab, LUISS University, Rome, Italy.,Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
| | - Elvira Padua
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele University, Rome, Italy.,School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy
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Ulupınar S, Özbay S, Gençoğlu C, Hazır T. Low-to-Moderate Correlations Between Repeated Sprint Ability and Aerobic Capacity: A Systematic Review and Meta-analysis. Strength Cond J 2023. [DOI: 10.1519/ssc.0000000000000752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Wang L, Wang J. EFFECTS OF HIGH-INTENSITY TRAINING ON ENDURANCE IN BASKETBALL PLAYERS. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012022_0633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
ABSTRACT Introduction: The aerobic endurance training of sports athletes has become the focus of research in institutions and related units. One of the recent proposals is high-intensity interval training to develop athletic aerobic endurance. Objective: Study the effect of high-intensity interval training on aerobic endurance in basketball players. Methods: Fifteen athletes from a university were randomly selected and divided into a high-intensity interval training group, a moderate-intensity continuous training group, and a low-intensity continuous training group, with the control of external influence factors. The indicators analyzed were the average aerobic endurance index of maximal oxygen consumption, average anaerobic capacity, and average maximal power output. The data were obtained before and after the experiment. They were compared and discussed using statistical analysis. Results: The average maximal oxygen consumption in the three training groups increased significantly, and the effect was most evident under the high-intensity intermittent training conditions. This training method could increase the maximal exercise time of the normal groups by up to two times. Conclusion: Intermittent high-intensity training can effectively improve the aerobic endurance of basketball players. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
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Affiliation(s)
- Lina Wang
- Hangzhou Vocational and Technical College, China
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Zhang Y, Gao Q, Wang X. EFFECTS OF PROGRESSIVE LOAD TRAINING ON SPRINTERS’ CARDIORESPIRATORY ENDURANCE. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012022_0579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
ABSTRACT Introduction: The most evident change during exercise is the increase in oxygen demand, and prolonged high-intensity exercises may impact this even more on this demand. Physical training with progressive loads is a method that aims to reach the training goals by adjusting factors such as initial load, stage load, and a load of the athletes and can be a monitor of the aerobic and anaerobic exercise on the athlete with potential benefits for the high demand of oxygenation. Objective: Study the changes in heart rate and indexes of cardiorespiratory endurance of sprinters under training with progressive loads. Methods: By random sampling, the study subjects were 15 male sprinters and 15 non-sportsmen as research volunteers. The study subjects performed a protocol with progressive load training on a platform. All subjects underwent the Italian Kosmai cardiopulmonary function test before and after training. Results: The subjects who did not practice the sport showed VO2 max values at an exercise intensity of 13 km/h. The VO2 max maximum for sprinters was 15 km/h. Individuals who were not sprinters generally showed lower VT levels than sprinters (P <0.05). Average non-speeder individuals demonstrated higher MET scores than sprinters. Conclusion: Cardiopulmonary endurance and energy metabolism levels are strongly related to long-term participation in physical activity and exercise intensity. Incremental load training improved cardiorespiratory fitness in sprinters. The results may provide a specific theoretical basis for the daily training of sprinters in the future. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
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Affiliation(s)
- Ya Zhang
- Hebei Professional College of Political Science and Law, China
| | - Qiang Gao
- Shijiazhuang University of Applied Technology, China
| | - Xiaofeng Wang
- Hebei Vocational College of Rail Transportation, China
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Effects of Warm-Up Training on Psychomotor Vigilance and Repeated-Sprint Ability of Professional Soccer Referees: A Pilot Study. Motor Control 2022; 26:518-535. [PMID: 35894891 DOI: 10.1123/mc.2022-0037] [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: 03/24/2022] [Revised: 05/10/2022] [Accepted: 05/23/2022] [Indexed: 11/18/2022]
Abstract
For this research, we analyzed the immediate effects of warm-up condition (WC) or without warm-up condition (WWC) on amateur referees' physical and cognitive functioning. Eight professional soccer referees from the Balearic Committee of Football Referees were the participants of this study. Body composition characteristics were measured and the scores on three tests were recorded: the Yo-Yo intermittent recovery, repeated-sprint ability, and psychomotor vigilance task. Regarding results, the psychomotor vigilance task was performed better after warm-up training (p = .002, η2 = .79) with faster reaction times following WC (M = 318.2, SD = 27.1 ms) than WWC (M = 334.9, SD = 26.1). Similarly, the referees' performance was better on the repeated-sprint ability test after WC (p = .002, d = 0.53) than WWC, with minimum and average power values higher after WC (M = 626.77, SD = 112.57) than WWC (M = 562.35, SD = 79.63). We conclude that re-warm-up training may mitigate the vigilance performance changes caused by effects of rest on soccer referees.
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Impact of the Menstrual Cycle Phases on the Movement Patterns of Sub-Elite Women Soccer Players during Competitive Matches. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084465. [PMID: 35457332 PMCID: PMC9025339 DOI: 10.3390/ijerph19084465] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 12/04/2022]
Abstract
The purpose of this study was to evaluate the influence of the menstrual cycle phases on the movement patterns of sub-elite women soccer players during competitive matches over three consecutive seasons. Individual movement data were analyzed and compared in eight players from the second French League at the early follicular (EF), late follicular (LF) and mid-luteal (ML) phases of their menstrual cycle, determined by the calendar method. The movement patterns, expressed as meters per minute, were recorded during competitive matches using devices placed on the player’s ankle. Our results showed significantly lower distances covered at moderate and high velocity in the EF phase than in the LF and ML phases (Cohen’s d effect size = 1.03 and 0.79, respectively). The total distance covered during matches and the number of sprints also were reduced during EF compared with LF (d = 0.78 and 0.7, respectively). Overall, the total distance and distance covered at low velocity were significantly lower during the second half-time of the matches (d = 1.51), but no menstrual cycle phase × game period interaction was noted. In conclusion, our study suggests that EF may impact the movement pattern of sub-elite women soccer players during competitive matches, without any modulation of this effect by the playing time. Despite the low sample size, these results can be useful for coaches and support staff to modulate training loads and player rotation during soccer games.
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Evaluation of Neuromuscular Fatigue According to Injury History in a Repeat Sprint Ability Test, Countermovement Jump, and Hamstring Test in Elite Female Soccer Players. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12062970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Sprinting is a fundamental component of the professional soccer player’s ability to achieve the highest performance in the sport. The aim of this study was to analyze the influence of hamstring injury history on the neuromuscular fatigue produced by an RSA test in elite female football players. Nineteen female elite soccer players of the Second Spanish Soccer Division participated in the study. The participants were divided into: (1) a Control group who have not suffered previous muscular injuries and (2) a Hamstring group with previous hamstring injury at least one season prior to the protocol. The players performed a protocol consisting of a Repeat Sprint Ability Test (RSA) (6 × 40 m; 30 s rest), and CMJ and Hamstring tests before and after the RSA. The different variables of the study were compared between groups with a two-way ANOVA for repeated measures. The main findings from the present study were that, in subjects with previous hamstring injury, the performance was impaired compared with the control group: (1) in the initial meters of the sprint during an RSA there was a higher percentage difference between SprintTT and ideal Split in 0–10 m compared to 0–20 m in the hamstring group (p = 0.006; ES = 0.51); and in situations of high fatigue there was a higher %Dif1vs6 compared to %Dif1vs5 (percentage difference between the first sprint and fifth sprint) in the hamstring group (p = 0.005; ES = 0.54) compared with the control group. It seems that in elite female soccer players with previous hamstring injury, RSA-induced fatigue produces a greater decrease in the performance in the first 10 m of the sprint compared to the control uninjured players.
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Gonçalves L, Clemente FM, Barrera JI, Sarmento H, González-Fernández FT, Rico-González M, Carral JMC. Exploring the Determinants of Repeated-Sprint Ability in Adult Women Soccer Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:4595. [PMID: 33926099 PMCID: PMC8123705 DOI: 10.3390/ijerph18094595] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/20/2021] [Accepted: 04/24/2021] [Indexed: 11/16/2022]
Abstract
This study aimed to explore the main determinants of repeated-sprint ability (RSA) in women soccer players considering aerobic capacity, sprinting performance, change-of-direction, vertical height jump, and hip adductor/abductor isometric strength. Twenty-two women soccer players from the same team participating in the first Portuguese league were observed. Fitness assessments were performed three times during a 22-week cohort period. The following assessments were made: (i) hip abductor and adductor strength, (ii) squat and countermovement jump (height), (iii) change-of-direction test, (iv) linear sprinting at 10- and 30-m, (v) RSA test, and (vi) Yo-Yo intermittent recovery test level 1. Positive moderate correlations were found between peak minimum RSA and adductor and abductor strength (r = 0.51, p < 0.02 and r = 0.54, p < 0.01, respectively). Positive moderate correlations were also found between peak maximum RSA and adductor and abductor strength (r = 0.55, p < 0.02 and r = 0.46, p < 0.01, respectively). Lastly, a moderate negative correlation was found between fatigue index in RSA and YYIR1 test performance (r = -0.62, p < 0.004). In conclusion, abductor and adductor isometric strength-based coadjutant training programs, together with a high degree of aerobic endurance, may be suitable for inducing RSA in female soccer players.
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Affiliation(s)
- Lillian Gonçalves
- Faculty of Educational Sciences and Sports Sciences, University of Vigo, 36005 Pontevedra, Spain;
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal;
- Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal
| | - Joel Ignacio Barrera
- University of Coimbra, Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, 3004-531 Coimbra, Portugal; (J.I.B.); (H.S.)
| | - Hugo Sarmento
- University of Coimbra, Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, 3004-531 Coimbra, Portugal; (J.I.B.); (H.S.)
| | - Francisco Tomás González-Fernández
- Department of Physical Activity and Sport Sciences, Pontifical University of Comillas (Centro de Estudios Superiores Alberta Giménez), 07013 Palma, Spain;
| | - Markel Rico-González
- BIOVETMED & SPORTSCI Research Group, University of Murcia, 30720 San Javier, Spain;
- Department of Physical Education and Sport, University of the Basque Country, UPV-EHU, Lasarte 71, 01007 Vitoria-Gasteiz, Spain
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