scholarly journals VO2max Characteristics of Elite Female Soccer Players, 1989–2007

2014 ◽  
Vol 9 (3) ◽  
pp. 515-521 ◽  
Author(s):  
Thomas A. Haugen ◽  
Espen Tønnessen ◽  
Erlend Hem ◽  
Svein Leirstein ◽  
Stephen Seiler
Keyword(s):  
Performance Level ◽  
Soccer Players ◽  
Training Center ◽  
National Team ◽  
Standard Level ◽  
World Class ◽  
Over Time ◽  
Field Position ◽  
Women's Soccer

Purpose:To quantify VO2max among female competitive soccer players as a function of performance level, field position, and age. In addition, the evolution of VO2max among world-class players over an 18-y period was quantified.Methods:Female players (N = 199, 22 ± 4 y, 63 ± 6 kg, height 169 ± 6 cm), including an Olympic winning squad, were tested for VO2max at the Norwegian Olympic Training Center between 1989 and 2007.Results:National-team players had 5% higher VO2max than 1st-division players (P = .042, d = 0.4), 13% higher than 2nd-division players (P < .001, d = 1.2), and 9% higher than junior players (P = .005, d = 1.0). Midfielders had 8% higher VO2max than goalkeepers (P = .048, d = 1.1). No significant differences were observed across outfield players or different age categories. There was a trend toward lower relative VO2max across time epochs.Conclusions:This study demonstrated that VO2max varies across playing-standard level in women’s soccer. No significant differences in VO2max were observed across outfield positions and age categories. Over time, there has been a slight negative development in VO2max among elite Norwegian soccer players.

scholarly journals Maximal Aerobic Power Characteristics of Male Professional Soccer Players, 1989–2012

2013 ◽  
Vol 8 (3) ◽  
pp. 323-329 ◽  
Author(s):  
Espen Tønnessen ◽  
Erlend Hem ◽  
Svein Leirstein ◽  
Thomas Haugen ◽  
Stephen Seiler
Keyword(s):  
Aerobic Power ◽  
Maximal Aerobic Power ◽  
Performance Level ◽  
Soccer Players ◽  
Data Set ◽  
National Team ◽  
Power Characteristics ◽  
Professional Soccer ◽  
Over Time ◽  
Effect Magnitude

Purpose:The purpose of this investigation was to quantify maximal aerobic power (VO2max) in soccer as a function of performance level, position, age, and time of season. In addition, the authors examined the evolution of VO2max among professional players over a 23-y period.Methods:1545 male soccer players (22 ± 4 y, 76 ± 8 kg, 181 ± 6 cm) were tested for VO2max at the Norwegian Olympic Training Center between 1989 and 2012.Results:No differences in VO2max were observed among national-team players, 1st- and 2nd-division players, and juniors. Midfielders had higher VO2max than defenders, forwards, and goalkeepers (P < .05). Players <18 y of age had ~3% higher VO2max than 23- to 26-y-old players (P = .016). The players had 1.6% and 2.1% lower VO2max during off-season than preseason (P = .046) and in season (P = .021), respectively. Relative to body mass, VO2max among the professional players in this study has not improved over time. Professional players tested during 2006–2012 actually had 3.2% lower VO2max than those tested from 2000 to 2006 (P = .001).Conclusions:This study provides effect-magnitude estimates for the influence of performance level, player position, age, and season time on VO2max in men’s elite soccer. The findings from a robust data set indicate that VO2max values ~62–64 mL · kg−1 · min−1 fulfill the demands for aerobic capacity in men’s professional soccer and that VO2max is not a clearly distinguishing variable separating players of different standards.

Speed and Countermovement-Jump Characteristics of Elite Female Soccer Players, 1995–2010

2012 ◽  
Vol 7 (4) ◽  
pp. 340-349 ◽  
Author(s):  
Thomas A. Haugen ◽  
Espen Tønnessen ◽  
Stephen Seiler
Keyword(s):  
Physical Characteristics ◽  
Performance Level ◽  
Soccer Players ◽  
Positive Development ◽  
Training Center ◽  
Countermovement Jump ◽  
Performance Levels ◽  
National Team ◽  
Large Velocity ◽  
Effect Magnitude

Purpose:The purpose of this investigation was to compare sprint and countermovement-jump (CMJ) performance among female competitive soccer players as a function of performance level, field position, and age. In addition, the authors wanted to quantify the evolution of these physical characteristics among elite players over a 15-y period.Methods:194 female elite players (22± 4.1 y, 63 ± 5.6 kg), including an Olympic winning squad, tested 40-m sprint with electronic timing and CMJ on a force platform at the Norwegian Olympic training center from 1995 to 2010.Results:Moderate to large velocity differences across performance levels and positions were observed. National-team players were 2% faster than 1st-division players (P = .027, d = 0.5) and 5% faster than 2nd-division players (P < .001, d = 1.3) over 0–20 m. National-team players jumped 8–9% higher than 1st-division players (P = .001, d = 0.6) and junior elite players (P = .023, d = 0.5). Forwards were 3–4% faster than midfielders (P < .001, d = 0.8) and goalkeepers (P = .003, d = 0.9) over 0–20 m. No differences in velocity or CMJ height were observed among the age categories. Players from 2006–2010 were 2% faster (P < .05, d = 0.6) than players from 1995–1999 over 20 m, whereas no differences in 20- to 40-m velocity or CMJ performance were observed.Conclusions:This study provides effect-magnitude estimates for the influence of performance level, age, and player position on sprint and CMJ performance in female soccer players. While 20- to 40-m velocity and CMJ performance have remained stable over the time, there has been a moderate but positive development in 0- to 20-m velocity among elite performers.

scholarly journals Anaerobic Performance Testing of Professional Soccer Players 1995–2010

2013 ◽  
Vol 8 (2) ◽  
pp. 148-156 ◽  
Author(s):  
Thomas A. Haugen ◽  
Espen Tønnessen ◽  
Stephen Seiler
Keyword(s):  
Peak Velocity ◽  
Performance Testing ◽  
Performance Level ◽  
Soccer Players ◽  
Positive Development ◽  
Countermovement Jump ◽  
National Team ◽  
Professional Soccer ◽  
Age Range ◽  
Effect Magnitude

Purpose:To compare sprint and countermovement-jump (CMJ) performance among competitive soccer players as a function of performance level, field position, and age. In addition, the authors wanted to quantify the evolution of these physical characteristics among professional players over a 15-y period.Methods:939 athletes (22.1 ± 4.3 y), including national-team players, tested 40-m sprint with electronic timing and CMJ on a force platform at the Norwegian Olympic Training Center between 1995 and 2010.Results:National-team and 1st-division players were faster (P < .05) than 2nd-division (1.0–1.4%), 3rd- to 5th-division (3.0–3.8%), junior national-team (1.7–2.2%), and junior players (2.8–3.7%). Forwards were faster than defenders (1.4%), midfielders (2.5%), and goalkeepers (3.2%) over 0–20 m (P < .001). Midfielders jumped ~2.0 cm lower than the other playing positions (P < .05). Sprinting velocity peaked in the age range 20–28 y and declined significantly thereafter (P < .05). Players from 2006–2010 had 1–2% faster 0–20 m and peak velocity than players from the 1995–1999 and 2000–2005 epochs, whereas no differences in CMJ performance were observed.Conclusions:This study provides effect-magnitude estimates for the influence of performance level, position, and age on sprint and CMJ performance in soccer. While CMJ performance has remained stable over the time, there has been a small but positive development in sprinting velocity among professional players.

scholarly journals Variação e mudança em nomes de jogadores da Seleção Brasileira

2020 ◽  
Vol 2 (3) ◽  
pp. 101-118
Author(s):  
Vinícius Pereira de Souza Cruz ◽  
Eduardo Tadeu Roque Amaral
Keyword(s):  
Theoretical Framework ◽  
Soccer Players ◽  
World Cup ◽  
Change Over Time ◽  
National Team ◽  
The World ◽  
Soccer Team ◽  
Over Time

Este artigo apresenta uma análise de antropônimos oficiais e não oficiais de jogadores da Seleção Brasileira do período compreendido entre 1958 e 2018. O marco teórico se apoia tanto em estudos de Onomástica, como Amaral (2011), Amaral e Seide (2020), Bajo Pérez (2002), Becker (2018), Fernández Leborans (1999), Urrutia e Sánchez (2009), Van Langendonck (2007), quanto em estudos sobre o futebol brasileiro, como Rodrigues (2010) e Caetano e Rodrigues (2009). Os dados analisados são os nomes das listas de jogadores convocados nesse período para os jogos mundiais. Esses nomes são classificados com o objetivo de observar a variação e a mudança ao longo do tempo. Os resultados indicam um predomínio de nomes oficiais em quase todos os anos, bem como uma maior tendência contemporânea às variantes mais formais dos nomes.Palavras-chave: Seleção Brasileira; jogadores de futebol; antropônimos.Variation and changes in soccer players’ names of Brazilian National soccer teamAbstract: This paper presents an analysis of official and unofficial anthroponyms of soccer players from the Brazilian National team from 1958 to 2018. The theoretical framework is based on onomastic studies, such as Amaral (2011), Amaral e Seide (2020), Bajo Pérez (2002), Becker (2012), Fernández Leborans (1999), Urrutia and Sánchez (2009), Van Langendonck (2007), Fernández Leborans (1999) as well as on analyzes about the Brazilian soccer such as Rodrigues (2010) and Caetano and Rodrigues (2009). The data analyzed are the names from the lists of players selected in that period to compete in the World Cup. These names are classified in order to observe the variation and the change over time. The results indicate a predominance of official names in almost every year, as well as a greater contemporary trend towards more formal variants of names. Keywords: Brazilian National soccer team; soccer players; anthroponyms.

scholarly journals Effects of Field Position on Fluid Balance and Electrolyte Losses in Collegiate Women’s Soccer Players

Medicina ◽  
2020 ◽  
Vol 56 (10) ◽  
pp. 502
Author(s):  
Haoyan Wang ◽  
Kate S. Early ◽  
Bailey M. Theall ◽  
Adam C. Lowe ◽  
Nathan P. Lemoine ◽  
...  
Keyword(s):  
Body Mass ◽  
Fluid Balance ◽  
Fluid Intake ◽  
Sweat Rate ◽  
Soccer Players ◽  
Moderate Risk ◽  
Risk Environments ◽  
Sweat Sodium ◽  
Field Position ◽  
Women's Soccer

Background and objectives: Research investigating hydration strategies specialized for women’s soccer players is limited, despite the growth in the sport. The purpose of this study was to determine the effects of fluid balance and electrolyte losses in collegiate women’s soccer players. Materials and Methods: Eighteen NCAA Division I women’s soccer players were recruited (age: 19.2 ± 1.0 yr; weight: 68.5 ± 9.0 kg, and height: 168.4 ± 6.7 cm; mean ± SD), including: 3 forwards (FW), 7 mid-fielders (MD), 5 defenders (DF), and 3 goalkeepers (GK). Players practiced outdoor during spring off-season training camp for a total 14 practices (WBGT: 18.3 ± 3.1 °C). The main outcome measures included body mass change (BMC), sweat rate, urine and sweat electrolyte concentrations, and fluid intake. Results: Results were analyzed for comparison between low (LOW; 16.2 ± 2.6° C, n = 7) and moderate risk environments for hyperthermia (MOD; 20.5 ± 1.5 °C, n = 7) as well as by field position. The majority (54%) of players were in a hypohydrated state prior to practice. Overall, 26.7% of players had a %BMC greater than 0%, 71.4% of players had a %BMC less than −2%, and 1.9% of players had a %BMC greater than −2% (all MD position). Mean %BMC and sweat rate in all environmental conditions were −0.4 ± 0.4 kg (−0.5 ± 0.6% body mass) and 1.03 ± 0.21 mg·cm−2·min−1, respectively. In the MOD environment, players exhibited a greater sweat rate (1.07 ± 0.22 mg·cm−2·min−1) compared to LOW (0.99 ± 0.22 mg·cm−2·min−1; p = 0.02). By position, DF had a greater total fluid intake and a lower %BMC compared to FW, MD, and GK (all p < 0.001). FW had a greater sweat sodium (Na+) (51.4 ± 9.8 mmol·L−1), whereas GK had the lowest sweat sodium (Na+) (30.9 ± 3.9 mmol·L−1). Conclusions: Hydration strategies should target pre-practice to ensure players are adequately hydrated. Environments deemed to be of moderate risk of hyperthermia significantly elevated the sweat rate but did not influence fluid intake and hydration status compared to low-risk environments. Given the differences in fluid balance and sweat responses, recommendations should be issued relative to soccer position.

scholarly journals Factors Influencing Creatine Kinase Response in Youth National Team Soccer Players

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.

Effect of Transcranial Direct Current Stimulation on Professional Female Soccer Players’ Recovery Following Official Matches

2021 ◽  
pp. 003151252110212
Author(s):  
Alexandre Moreira ◽  
Daniel Gomes da Silva Machado ◽  
Marom Bikson ◽  
Gozde Unal ◽  
Paul S. Bradley ◽  
...  
Keyword(s):  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Repeated Measures ◽  
Training Session ◽  
Well Being ◽  
Soccer Players ◽  
Total Quality ◽  
Direct Current Stimulation ◽  
Sham Condition ◽  
World Class

This study investigated the effect of transcranial direct current stimulation (tDCS) combined with a recovery training session on the well-being and self-perceived recovery of professional female soccer players after official matches. Data from 13 world-class players were analyzed after participating in four official soccer matches of the first division of the Brazilian Women’s Soccer Championship (7-, 10-, and 13-day intervals). We applied anodal tDCS (a-tDCS) over the left dorsolateral prefrontal cortex with 2 mA for 20 minutes (+F3/−F4 montage) the day after each match. Participants underwent two randomly ordered sessions of a-tDCS or sham. Players completed the Well-Being Questionnaire (WBQ) and the Total Quality Recovery (TQR) scale before each experimental condition and again the following morning. A two-way repeated-measures ANOVA showed a significant time x condition interaction on the WBQ (F(1,11)=5.21; p=0.043; ηp2=0.32), but not on the TQR (F(1,12) = 0.552; p = 0.47; ηp2 = 0.044). There was a large effect size (ES) for a-tDCS for the WBQ score (ES = 1.02; 95%CI = 0.17;1.88), and there was a moderate WBQ score increase (ES = 0.53; 95%CI = −0.29;1.34) for the sham condition. We found similar increases in the TQR score for a-tDCS (ES = 1.50; 95%CI = 0.63–2.37) and the sham condition (ES = 1.36; 95%CI = 0.51–2.22). These results suggest that a-tDCS (+F3/−F4 montage) combined with a recovery training session may slightly improve perceived well-being beyond the level of improvement after only the recovery training session among world-class female soccer players. Prior to widely adopting this recovery approach, further study is needed with larger and more diverse samples, including for female teams of different performance levels.

We’ve Come a Long Way, But We Could Be Doing Better: Gendered Commentary in U.S. Media Coverage of the 1999 and 2019 Women’s World Cup

2021 ◽  
pp. 1-11
Author(s):  
Eileen Díaz McConnell ◽  
Neal Christopherson ◽  
Michelle Janning
Keyword(s):  
Contrast Media ◽  
Media Coverage ◽  
Hard Work ◽  
Media Representations ◽  
World Cup ◽  
National Team ◽  
Gender Based ◽  
First World ◽  
The U.S ◽  
Over Time

In 2019, the U.S. Women’s National Team earned its fourth FIFA Women’s World Cup. Has gendered commentary in media coverage about the U.S. Women’s National Team changed since winning their first World Cup 20 years ago? Drawing on 188 newspaper articles published in three U.S. newspapers in 2019, the analyses contrast media representations of the 2019 team with a previous study focused on coverage of the 1999 team. Our analysis shows important shifts in the coverage over time. The 1999 team was popular because of their contradictory femininity in which they were “strong-yet-soft.” By 2019, the team’s popularity was rooted in their talent, hard work, success, and refusal to be silent about persisting gender-based disparities in sport and the larger society.

Power And Bilateral Force Differences In Professional Soccer Players Regarding The Field Position

2015 ◽  
Vol 47 ◽  
pp. 966 ◽  
Author(s):  
Frantisek Zahalka ◽  
Tomas Maly ◽  
Lucia Mala ◽  
Pavel Hrasky
Keyword(s):  
Soccer Players ◽  
Professional Soccer ◽  
Field Position
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