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Diagnostic value of Beep and Yo-Yo tests in assessing physical performance of female soccer players

References 1. Arazi H., Keihanivan A., Eatemady-Boroujeni A., Oftade A., Takhska S., Asadi A., Ramirez-Campillo R. (2017) Effects of heart rate vs. speed-based high intensity interval training on aerobic and anaerobic capacity of soccer players. Sports (Basel), 5(3): 57. DOI: 10.3390/sports5030057. 2. Bangsbo J., Nørregaard L., Thorsoe F. (1991) Activity profile of competition soccer. Can J. Appl. Sport Sci., 16: 110-116. 3. Cardoso de Araújo M., Baumgart C., Jansen C.T., Freiwald J., Hoppe M.W. (2018) Sex differences in physical capacities

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Bilateral and Unilateral Asymmetries of Isokinetic Strength and Flexibility in Male Young Professional Soccer Players

References Alentorn-Geli E, Myer GD, Silvers HJ, Samitier G, Romero D, Lázaro-Haro C, Cugat R. Prevention of noncontact anterior cruciate ligament injuries in soccer players. Part 1: Mechanisms of injury and underlying risk factors. Knee Surg Sports Traumatol Arthrosc, 2009; 17(7): 705-729 Amiri-Khorasani M, Abu Osman NA, Yusof A. Acute effect of static and dynamic stretching on hip dynamic range of motion (DROM) during instep kicking in professional soccer players. J Strength Cond Res , 2011; 25(6): 1647

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Leadership power perceptions of soccer coaches and soccer players according to their education

Kinetics. Konter E. Towards adaptation of self and other versions of the power in soccer questionnaire for Turkey. Eur Sport Man Quart, 2009; 3: 311-332. Konter E. Psychological skills of professional soccer players according to their age groups. Gazi J Phys Edu Sport Sci, 2005; 1: 17-24. Laughlin N, Laughlin S. The relationship between the similarity in perceptions of teacher/coach leader behavior and evolution of their effectiveness. Int J Sport Psychol, 1994; 22: 396-410. Leith LM. The psychology of

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The Effect of Heavy Weight Training on Physiological Abilities of Soccer Players Under the Age 21 Years Old

References 1. AHMED SALAH, 2004. Effect of Proposed Program for Dynamic and Static Muscle Work on Some Physical Variables and Respiratory System Functions (Comparative Study). ASSIUT Journal of physical Education . The 8( 2), p. 174. 2. AKENHEAD, R. M., 2014. Examining the Physical and Physiological Demands of Elite Football. Northumbria University. 3. AKUBAT, I., E. PATEL, S. BARRETT & G. ABT, 2012. Methods of monitoring the training and match load and their relationship to changes in fitness in professional youth soccer players. Journal

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Mental Strategies Predict Performance and Satisfaction with Performance Among Soccer Players

-season (T1) to the mid-season (T2) to the end-of season (T3). Second, it was hypothesized that psychological strategies measured at the pre-season (T1) would predict athletes’ endurance performance and satisfaction with individual performance at the end-of-season (T3), after controlling for the respective baseline index of endurance performance or satisfaction with individual performance at T1. Methods Participants At T1, the study sample consisted of 97 male soccer players aged 16–27 years (M = 18.23, SD = 1.84), with reported training experience of 3

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An Evaluation of the Levels of Vitamin D and Bone Turnover Markers After the Summer and Winter Periods in Polish Professional Soccer Players

C. Effect of physical activity on calcium homeostasis and calciotropic hormones: a review. Calcif Tissue Int , 2009; 85: 277 - 286 Maïmoun L, Sultan C. Effects of physical activity on bone remodeling. Metabolism , 2011; 60: 373 - 388 Morton JP, Iqbal Z, Drust B, Burgess D, Close GL, Brukner PD. Seasonal variation in vitamin D status in professional soccer players of the English Premier League. Appl Physiol Nutr Metab, 2012; 37: 798 - 802 Mowe M, Haug E, Bohmer T. Low serum calcidiol concentration in older adults

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Relationships Between the Expression of the ACTN3 Gene and Explosive Power of Soccer Players

endurance capacity when compared to the wild‐type gene variant ( Eynon et al., 2013 ). Vincent and colleagues (2007) established that in human muscle biopsy samples obtained from healthy, untrained young men, proportion of fast‐twitch fibers differed among 577RR and 577XX individuals, in favor of 577RR carriers. Genotype 577XX seems to be beneficial for endurance performance; this genotype occurs with higher frequency in endurance athletes than in sprinting/power athletes. In terms of soccer players, those harboring 577RR genotype have higher jumping potential and are

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Influence of the Numbers of Players in the Heart Rate Responses of Youth Soccer Players Within 2 vs. 2, 3 vs. 3 and 4 vs. 4 Small-sided Games

professional soccer match-play: The FA Premier League and La LIGA. Eur J Sport Sci, 2011b; 11(2): 51-59 Dellal A, Chamari K, Pintus A, Girard O, Cotte T, Keller D. Heart rate responses during small-sided games and short intermittent running training in elite soccer players: a comparative study. J Strength Cond Res, 2008; 22(5): 1449-57 Dellal A, Keller D, Carling C, Chaouachi A, Wong DP, Chamari, K. Physiologic effects of directional changes in intermittent exercise in soccer players. J Strength Cond Res, 2010; 24(12): 3219

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Determinants of feedback retention in soccer players

Abstract

This study analyzed soccer players’ retention of coaches’ feedback during training sessions. We intended to determine if the retention of information was influenced by the athletes’ personal characteristic (age, gender and the sports level), the quantity of information included in coach’s feedback (the number of ideas and redundancy), athletes’ perception of the relevance of the feedback information and athletes’ motivation as well as the attention level. The study that was conducted over the course of 18 sessions of soccer practice, involved 12 coaches (8 males, 4 females) and 342 athletes (246 males, 96 females), aged between 10 and 18 years old. All coach and athlete interventions were transposed to a written protocol and submitted to content analysis. Descriptive statistics and multiple linear regression were calculated. The results showed that a substantial part of the information was not retained by the athletes; in 65.5% of cases, athletes experienced difficulty in completely reproducing the ideas of the coaches and, on average, the value of feedback retention was 57.0%. Six variables with a statistically significant value were found: gender, the athletes’ sports level, redundancy, the number of transmitted ideas, athletes’ perception of the relevance of the feedback information and the athletes’ motivation level.

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Effects Of Different PUFA Supplementation On Inflammatory Response Markers In Young Soccer Players

Abstract

Considering the limited knowledge regarding the effects of n-3 and n-6 PUFAs on the inflammatory response during physical activity, we aimed to evaluate the level of pro- and anti-inflammatory cytokines in young soccer players before and after a maximal physical load test at the beginning and end of a two-month training process. The study included 75 young footballers from Football School “Kragujevac,” who were followed during the two-month training programme. The subjects were divided into the following groups: 1) control group (consumed a standard diet); 2) group that consumed fish oil (2500 mg of n-3 PUFAs per day); 3) group that consumed nutritional sunflower oil (2500 mg of n-6 PUFAs daily). The maximal progressive exercise test was performed using a treadmill belt. Venous blood samples were drawn 4 times for the determination of cytokine levels (IL-6 and TNF-α): before and after the exercise load test before the two-month training programme (initial measurement) and immediately before and after the exercise load test after the two-month training programme (control measurement). Supplementation with fish oil (n-3) has been associated with reduced levels of IL-6 compared with the initial values. After an acute bout of exercise, n-3 PUFAs did not show a significant effect on inflammatory marker dynamics, whereas n-6 PUFAs slightly stimulated the production of TNF-α.

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