Sprint Endurance Abilities in Elite Female Soccer Players

Purpose: To profile sprint endurance performance of elite-level female soccer players. Methods: Twenty-five female national-team soccer players (age 25.1 [2.7] y, body mass 59.6 [3.6] kg, height 168.5 [4.1] cm) were tested for sprint endurance, performing 5 maximal sprints, interspersed with 30 seconds of active recovery (5 × 30 m) and a 30-second all-out shuttle run in a soccer pitch. The Yo-Yo Intermittent Recovery Test level 1 (YYIR1) evaluated intermittent high-intensity endurance under the same field-testing conditions. Maximal anaerobic capacity was assessed while participants performed three 10-second all-out bouts separated by 20 seconds of passive recovery (3 × 10 s) on a nonmotorized treadmill. Results: Huge interplayer variability was observed for sprint decrements in 3 × 10 seconds (coefficient of variation = 37%) and 5 × 30 m (coefficient of variation = 62%). The 3 × 10 performance was largely associated with 5 × 30-m mean and best time and very largely with 30 seconds. A very large and nearly perfect correlation was observed between 30 seconds and 5 × 30 mMean (r = −.86) and 5 × 30 mBest (r = −.92), respectively. The YYIR1 was moderately to largely associated with 5 × 30-m variables and 30 seconds, respectively. A nearly perfect association was observed between 5 × 30 mBest and 5 × 30 mMean (r = .97). Conclusions: Elite female soccer players’ sprint endurance variables are characterized by remarkable variability. Associations between sprint endurance variables suggest physiological interdependence and a likelihood of a general ability in sustaining sprinting in this population.

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Chronic Ingestion of Sodium and Potassium Bicarbonate, with Potassium, Magnesium and Calcium Citrate Improves Anaerobic Performance in Elite Soccer Players

Nutrients ◽

10.3390/nu10111610 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1610 ◽

Cited By ~ 5

Author(s):

Jakub Chycki ◽

Artur Golas ◽

Mateusz Halz ◽

Adam Maszczyk ◽

Michal Toborek ◽

...

Keyword(s):

Anaerobic Power ◽

Lactate Concentration ◽

Anaerobic Capacity ◽

Soccer Players ◽

Potassium Bicarbonate ◽

Control Group ◽

Anaerobic Performance ◽

Active Recovery ◽

Blood Ph ◽

Sodium And Potassium

Anaerobic power and anaerobic capacity significantly influence performance in many sport disciplines. These include prolonged sprints in athletics, swimming, or cycling, and other high intensity intermittent sports, such as soccer or basketball. Considering the association of exercise-induced acidosis and fatigue, the ingestion of potential buffering agents such as sodium bicarbonate, has been suggested to attenuate metabolic acidosis and improve anaerobic performance. Since elite soccer players cover from 200 to 350 m while sprinting, performing 40–60 all out sprints during a game, it seems that repeated sprint ability in soccer players is among the key components of success. In our experiment, we evaluated the effectiveness of chronic supplementation with sodium and potassium bicarbonate, fortified with minerals, on speed and speed endurance in elite soccer players. Twenty-six soccer players participated in the study. The subjects were randomly divided into two groups. The experimental group was supplemented with sodium bi-carbonate and potassium di-carbonate fortified with minerals, while the control group received a placebo. The athletes were tested at baseline and after nine days of supplementation. Anaerobic performance was evaluated by the Repeated Anaerobic Sprint Test (RAST) protocol which involved 6 × 30 m max sprints, separated by 10 s of active recovery. Resting, post ingestion and post exercise concentrations of HCO3− and blood pH were measured as well as lactate concentration. The current investigation demonstrated a significant increase in RAST performance of elite soccer players supplemented with sodium and potassium bicarbonate along with calcium phosphate, potassium citrate, and magnesium citrate ingested twice a day over a nine-day training period. The improvements in anaerobic performance were caused by increased resting blood pH and bicarbonate levels.

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Factors Influencing Creatine Kinase Response in Youth National Team Soccer Players

Sports Health A Multidisciplinary Approach ◽

10.1177/1941738121999387 ◽

2021 ◽

pp. 194173812199938

Author(s):

Gabor Schuth ◽

Gyorgy Szigeti ◽

Gergely Dobreff ◽

Peter Revisnyei ◽

Alija Pasic ◽

...

Keyword(s):

Creatine Kinase ◽

Prediction Models ◽

Soccer Players ◽

Linear Regression Models ◽

Level Of Evidence ◽

Internal Load ◽

Youth Soccer ◽

National Team ◽

Weekly Training ◽

The Relationship

Background: Previous studies have examined the relationship between external training load and creatine kinase (CK) response after soccer matches in adults. This study aimed to build training- and match-specific CK prediction models for elite youth national team soccer players. Hypothesis: Training and match load will have different effects on the CK response of elite youth soccer players, and there will be position-specific differences in the most influential external and internal load parameters on the CK response. Study Design: Prospective cohort study. Level of Evidence: Level 4. Methods: Forty-one U16-U17 youth national team soccer players were measured over an 18-month period. Training and match load were monitored with global positioning system devices. Individual CK values were measured from whole blood every morning in training camps. The dataset consisted of 1563 data points. Clustered prediction models were used to examine the relationship between external/internal load and consecutive CK changes. Clusters were built based on the playing position and activity type. The performance of the linear regression models was described by the R2 and the root-mean-square error (RMSE, U/L for CK values). Results: The prediction models fitted similarly during games and training sessions ( R2 = 0.38-0.88 vs 0.6-0.77), but there were large differences based on playing positions. In contrast, the accuracy of the models was better during training sessions (RMSE = 81-135 vs 79-209 U/L). Position-specific differences were also found in the external and internal load parameters, which best explained the CK changes. Conclusion: The relationship between external/internal load parameters and CK changes are position specific and might depend on the type of session (training or match). Morning CK values also contributed to the next day’s CK values. Clinical Relevance: The relationship between position-specific external/internal load and CK changes can be used to individualize postmatch recovery strategies and weekly training periodization with a view to optimize match performance.

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Injuries in elite level male beach soccer players: a prospective three year study

The Physician and Sportsmedicine ◽

10.1080/00913847.2021.1889933 ◽

2021 ◽

pp. 1-6

Author(s):

Yavuz Lima ◽

Bulent Bayraktar

Keyword(s):

Soccer Players ◽

Elite Level

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Relationship between Repeated Sprint Ability and Aerobic Capacity in Professional Soccer Players

The Scientific World JOURNAL ◽

10.1155/2013/952350 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 6

Author(s):

Rhys M. Jones ◽

Christian C. Cook ◽

Liam P. Kilduff ◽

Zoran Milanović ◽

Nic James ◽

...

Keyword(s):

Aerobic Capacity ◽

Significant Negative Correlation ◽

Soccer Players ◽

Active Recovery ◽

Maximal Aerobic Capacity ◽

Sprint Time ◽

Repeated Sprint Ability ◽

Professional Soccer ◽

Repeated Sprint ◽

Sprint Ability

Aim. The aim of the present study was to investigate the relationship between maximal aerobic capacity () and repeated sprint ability (RSA) in a group of professional soccer players.Methods. Forty-one professional soccer players (age yrs, height cm, weight kg) were required to perform tests to assess RSA and on two separate days with at least 48 hr rest between testing sessions. Each player performed a treadmill test to determine their and a test for RSA involving the players completing m sprints (turn after 20 m) with 20 s active recovery between each sprint.Results. There was a significant negative correlation between body mass normalised and mean sprint time () (; ) and total sprint time () (, ).Conclusion. Results of the current study indicate that is one important factor aiding soccer players in the recovery from repeated sprint type activities.

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Effects of 8weeks Pre-season Physical Training on Body Composition, Physical Fitness, Muscle Strength, Aerobic and Anaerobic Capacity of Professional League(K-3) Soccer Players by Each Position.

The Korea Journal of Sport ◽

10.46669/kss.2021.19.3.063 ◽

2021 ◽

Vol 19 (3) ◽

pp. 705-717

Author(s):

Ki-Jae Song ◽

Keyword(s):

Body Composition ◽

Muscle Strength ◽

Physical Fitness ◽

Physical Training ◽

Anaerobic Capacity ◽

Soccer Players ◽

Aerobic And Anaerobic

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Seasonal Body Composition Variation Amongst Elite European Professional Soccer Players: An Approach of Talent Identification

Journal of Human Kinetics ◽

10.1515/hukin-2017-0132 ◽

2018 ◽

Vol 62 (1) ◽

pp. 177-184 ◽

Cited By ~ 6

Author(s):

Adam Lee Owen ◽

Carlos Lago-Peñas ◽

Gordon Dunlop ◽

Rouissi Mehdi ◽

Moktar Chtara ◽

...

Keyword(s):

Body Composition ◽

Lean Body Mass ◽

Body Mass ◽

Fat Mass ◽

Body Height ◽

Fat Free Mass ◽

Soccer Players ◽

Professional Soccer ◽

Elite Level ◽

Composition Profiles

AbstractThe primary aim of the investigation was to study the seasonal changes in body composition in elite European soccer players and identify key playing positional differences. Twenty-two players (age = 24 ± 3.7 years, body height = 180.45 ± 5.12 cm, body mass = 76.66 ± 5.34 kg) were tested. Players’ mass (kg), lean body mass (LBM), fat free mass (FFM), fat mass (FM), muscle girths (MG) and sum of 8 skinfolds (mm) were measured across 5 time points (T0 = Start of pre-season training; T1 = End of pre-season training; T2 = Mid-season; T3 = End of mid-season break; T4 = End of season). Players were divided into their tactical positional roles for analysis. The specific positions they were divided into included defenders (n = 8), midfielders (n = 8) and forwards (n = 6). Assessment of training and matchplay exposure were also recorded. Sites-4, Sites-7, Sites-8 and Fat Mass decreased dramatically from T0 to T1 and T2 in all playing positions (p < 0.01), while no remarkable differences were found between T2, T3 and T4. Except for defenders, calf girth and lean mass were higher in T2, T3 and T4 compared to T0 and T1 (p < 0.01). Midfielders were found to be leaner than forwards and defenders in all data collection time point sessions. Defenders showed higher values in calf girth and lean body mass than midfielders and forwards. It can be concluded from this investigation that there are large variances n positional body composition profiles amongst professional European soccer players. Furthermore, significant changes are prevalent and occur across the season from LBM, FFM, MG and skinfold assessment amongst European elite level soccer players.

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Reliability and Construct Validity of Yo-Yo Tests in Untrained and Soccer-Trained Schoolgirls Aged 9–16

Pediatric Exercise Science ◽

10.1123/pes.2015-0212 ◽

2016 ◽

Vol 28 (2) ◽

pp. 321-330 ◽

Cited By ~ 15

Author(s):

Susana C. A. Póvoas ◽

Carlo Castagna ◽

José Manuel da Costa Soares ◽

Pedro Silva ◽

Manuel Coelho-e-Silva ◽

...

Keyword(s):

Heart Rate ◽

Construct Validity ◽

Coefficient Of Variation ◽

Intermittent Exercise ◽

Intraclass Correlation ◽

Soccer Players ◽

Confidence Limits ◽

Peak Heart Rate ◽

Level 1 ◽

Level 2

Purpose:The reliability and construct validity of three age-adapted-intensity Yo-Yo tests were evaluated in untrained (n = 67) vs. soccer-trained (n = 65) 9- to 16-year-old schoolgirls.Methods:Tests were performed 7 days apart for reliability (9- to 11-year-old: Yo-Yo intermittent recovery level 1 children’s test; 12- to 13-yearold: Yo-Yo intermittent endurance level 1; and 14- to 16-year-old: Yo-Yo intermittent endurance level 2).Results:Yo-Yo distance covered was 40% (776 ± 324 vs. 556 ± 156 m), 85% (1252 ± 484 vs. 675 ± 252 m) and 138% (674 ± 336 vs. 283 ± 66 m) greater (p ≤ .010) for the soccer-trained than for the untrained girls aged 9–11, 12–13 and 14–16 years, respectively. Typical errors of measurement for Yo-Yo distance covered, expressed as a percentage of the coefficient of variation (confidence limits), were 10.1% (8.1–13.7%), 11.0% (8.6–15.4%) and 11.6% (9.2–16.1%) for soccer players, and 11.5% (9.1–15.8%), 14.1% (11.0–19.8%) and 10.6% (8.5–14.2%) for untrained girls, aged 9–11, 12–13 and 14–16, respectively. Intraclass correlation coefficient values for test-retest were excellent (0.795–0.973) in both groups. No significant differences were observed in relative exercise peak heart rate (%HRpeak) between groups during test and retest.Conclusion:The Yo-Yo tests are reliable for determining intermittent-exercise capacity and %HRpeak for soccer players and untrained 9- to 16-year-old girls. They also possess construct validity with better performances for soccer players compared with untrained age-matched girls, despite similar %HRpeak.

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Effects of intermittent negative pressure and active recovery therapies in the post-match period in elite soccer players: A randomized, parallel arm, comparative study

Biomedical Human Kinetics ◽

10.2478/bhk-2020-0008 ◽

2020 ◽

Vol 12 (1) ◽

pp. 59-68

Author(s):

Alex Souto Maior ◽

Marcio Tannure ◽

Fábio Eiras ◽

Arthur de Sá Ferreira

Keyword(s):

Comparative Study ◽

Skin Temperature ◽

Negative Pressure ◽

Lower Limbs ◽

Soccer Players ◽

Active Recovery ◽

Open Label ◽

Pressure Therapy ◽

Professional Soccer ◽

Ergometer Exercise

SummaryStudy aim: This study compared the effects of intermittent negative pressure therapy (INPT) vs. active recovery therapy (ART) on post-match physiological parameters such as serum CK level and skin temperature of the lower limbs in elite soccer players.Material and methods: Twenty healthy male professional soccer players from a Brazilian first division soccer club were enrolled in this randomized, parallel arm, open label, comparative study. After participating in 2 soccer matches, they were randomly assigned to two groups (n = 10) to receive a 30-min session of INPT (intermittent exchange of hypobaric pressure range 33 to 51 mmHg) or ART (self-myofascial release, mobility and stability exercises, and cycle ergometer exercise). The intervention was conducted after a match with assessments immediately before and after the intervention and again 24 h after the intervention.Results: A significant interaction effect (F2,36 = 4.503, p = 0.018, η2 = 0.130) was observed, indicating that the decrease of CK from pre-intervention to 24 h post-intervention was greater in the INPT than in the ART group. Lower limb skin temperature was significantly lower after INPT than after ART (p < 0.003).Conclusions: Serum CK level and skin temperature of lower limbs showed better recovery up to 24 h after the intervention with INPT in elite soccer players.

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