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Öğe Bio-Banding in Judo: The Mediation Role of Anthropometric Variables on the Maturation Effect(MDPI, 2020) Giudicelli, Bruno B.; Luz, Leonardo G. O.; Sogut, Mustafa; Massart, Alain G.; Junior, Arnaldo C.; Figueiredo, Antonio J.Young judo athletes are bio-banding based on age and body mass and compete in weight classes. The purposes of this study were to investigate the influences of maturation on physical performance in young judokas through controlling the chronological age and body mass, and to examine the mediating role of anthropometric variables. Sixty-seven judokas, aged 11.0-14.7, were measured for 11 anthropometric and seven physical performance variables. Pearson partial correlations were conducted to verify the relationship between the maturational indicator and the dependent variables. Mediation analyses were performed to identify the extent to which anthropometric variables mediate the relationship. The maturation effect remained on the aerobic capacity and handgrip strength (p < 0.05). Fat mass (b = 80.335, 95%CI 11.580-204.270) and fat-free mass (b = 108.256, 95%CI 39.508-207.606) totally mediated the effect on aerobic capacity. Fat mass (b = 0.023, 95%CI 0.004-0.057), fat-free mass (b = 0.029, 95%CI 0.011-0.058), stature (b = 0.031, 95%CI 0.008-0.061), arm span (b = 0.021, 95%CI 0.003-0.044), and inferior members length (b = 0.022, 95%CI 0.005-0.049) totally mediated the effect on handgrip strength. The effect of biological maturation is noticeable even after age and body mass control, being mediated by anthropometric variables related to body composition and size.Öğe A Comparison of Serve Speed and Motor Coordination between Elite and Club Level Tennis Players(Sciendo, 2017) Sogut, MustafaThe purpose of this study was to compare the serve speed and motor coordination of elite and club level junior tennis players aged 11-14 years. Participants (n=35) were assigned to one of the two groups according to their experience, weekly training volume and competition level. Serve speed was assessed with a sports radar gun. Motor coordination was evaluated by means of the Korperkoordinationstest fur Kinder. The main results revealed that serve speed and motor coordination performance levels of the elite group were significantly higher than those of the club group. This study emphasized the importance of early participation and training intensity, which can play an important role in enhancement of serve speed and motor coordination.Öğe Gross motor coordination in junior tennis players(Taylor & Francis Ltd, 2016) Sogut, MustafaThe purpose of this study was twofold: (1) to determine the gross motor coordination performance levels of junior tennis players and (2) to analyse the effects of age and gender. Participants were junior male (n=50) and female (n=51) tennis players aged 6-14. Korperkoordinationstest fur Kinder (KTK) was used to assess the gross motor coordination of the participants. Results revealed that none of the participants performed lower than normal level in motor coordination. Besides, 40.6% of the participants performed above normal level. No gender differences were found on all subtests of KTK and also on total motor quotient. Although older players performed better on each test than their younger counterparts for the raw scores, no significant age effect was observed on motor quotient scores among different age groups.Öğe Joint angles during successful and unsuccessful tennis serves kinematics of tennis serve(Turkish Joint Diseases Foundation, 2009) Goktepe, Ayhan; Ak, Emre; Sogut, Mustafa; Karabork, Hakan; Korkusuz, FezaObjectives: The aim of this study was to investigate the joint angle differences in successful and unsuccessful tennis serves of junior tennis players. Patients and methods: Nine healthy junior tennis players (5 girls, 4 boys; mean age 11.8 +/- 0.8 years; height 153.6 +/- 7.2 cm; body mass index 42.3 +/- 4.1 kg; playing experience 6.2 +/- 1.5 years) volunteered to participate in this study. They were asked to perform tennis serves as fast as they can as if they were in an actual game. Successful and unsuccessful serves were recorded using two high speed cameras and then analyzed using Pictran software. Angle changes in pre-impact, impact and post-impact phases were compared. Results: The results of paired sample t-tests revealed nosignificant differences between successful and unsuccessful tennis serves in all three phases. Conclusion: This study failed to show differences between successful and unsuccessful tennis serves in pre-impact, impact and post-impact phases. However, future research with more detailed analyses would be needed to reveal the possible changes in the joints while serving.Öğe MATURITY-ASSOCIATED VARIATIONS IN ANTHROPOMETRY, PHYSICAL FITNESS, AND SPORT-SPECIFIC SKILLS AMONG YOUNG MALE AND FEMALE FUTSAL PLAYERS(Termedia Publishing House Ltd, 2022) Sogut, Mustafa; Yapici, Hakan; Luz, Leonardo G. O.; Giudicelli, Bruno; Clemente, Filipe Manuel; Dogan, Ali AhmetPurpose. The aim of this study was to determine the maturity -related variations in anthropometry, physical fitness, and sport -specific skills among young male and female futsal players. Methods. Overall, 77 athletes (44 boys and 33 girls) aged 10.5-13.7 (12.3 +/- 0.9) years were measured for stature, body mass, 2 skinfolds, as well as 3 fitness and 2 sport -specific test items. Results. Compared with boys, girls were significantly more advanced in maturation and had greater body mass index and body fat percentage. Except for the countermovement jump result, boys outperformed girls in all fitness and sport -skill assessments. Regardless of gender, early maturing players were significantly taller and heavier and had higher body fat percentage and grip strength than their late maturing counterparts. In boys, none of the other physical fitness and sport -specific skill measures significantly differed between contrasting maturity groups. In turn, early maturing girls had significantly better scores in all physical fitness measurements than late maturing girls. Partial correlations, with chronological age controlled as a covariate, indicated moderate to high correlations between the maturation indicator and stature and body mass in both boys and girls. Except for grip strength and dribbling tests for boys and girls, respectively, other physical fitness and sport -specific skill measures did not show a significant correlation with maturity status. Conclusions. These results highlight that rather than with functional and sport -specific characteristics, physical maturity status may be associated with greater body size in young futsal players.Öğe Ranking in young tennis players-a study to determine possible correlates(Springer, 2019) Sogut, Mustafa; Luz, Leonardo G. O.; Kaya, Omer Baris; Altunsoy, KuebraThe purpose of this study was to examine the associations of physical, functional, experiential, and training-related characteristics with ranking in a cohort of competitive U12 tennis players. A total of 119 (boys= 68, girls= 51) nationally ranked Turkish players aged 9.6-12.3 years (10.9 +/- 0.7) were measured on stature, sitting height, body mass, skinfolds, grip strength, and agility. Age at peak height velocity (APHV), percentage of predicted adult stature (PAS%), body mass index (BMI), body fat percentages (BF%) and growth status were calculated. Weekly training hours and experiences in regular tennis training and tournament play were recorded. Compared to boys, girls were found to be significantly taller and more advanced in maturation. There were no significant relationships between growth, APHV, BMI, BF% and rankings. In girls, PAS% was significantly correlated with ranking. Results revealed that variables regarding experience, training volume, and motor performance were significantly associated with ranking in both boys and girls. Age to start regular training (r= -0.540) for the girls and weekly training volume (r= -0.489) for the boys were the most correlated variables. These results were confirmed by logistic regression models. The findings highlight the possible positive consequences of early participation in regular tennis training and tournaments, rather than growth and body composition, on the ranking of U12 tennis players in both genders.Öğe Stature: Does it really make a difference in match-play outcomes among professional tennis players?(Routledge Journals, Taylor & Francis Ltd, 2018) Sogut, MustafaThe purpose of this study was to determine the effects of body height on match-play characteristics among professional tennis players participated in the 2017 Wimbledon Championships. Anthropometric features and 11 match-play statistics of 119 players (male=60, female=59) were obtained from the official web page of the tournament and/or from the ATP and WTA. They were divided into three consecutive sub-groups according to their heights. Results revealed that, regardless of gender, players in the tallest group had significantly produced higher speed on both first and second serve than the players in the other groups. Tallest male players exhibited significantly greater scores on the percentage of first serve points won and aces per set than the players in the shortest group. Conversely, players in the shortest groups achieved significantly more percentage of return point than the players in the tallest groups. Height was found to be significantly and positively correlated with both first and second serve speeds, and aces performed per set and significantly and negatively associated with percentage of return points won in both genders. These findings highlight the considerable advantages and disadvantages of stature on serve and return related match outcomes in a grass court tournament.Öğe Variations in Central Adiposity, Cardiovascular Fitness, and Objectively Measured Physical Activity According to Weight Status in Children (9-11 Years)(Frontiers Media Sa, 2019) Sogut, Mustafa; Clemente, Filipe Manuel; Clark, Cain C. T.; Nikolaidis, Pantelis Theodoros; Rosemann, Thomas; Knechtle, BeatThe purpose of this study was twofold: first, to compare the central adiposity (CA), cardiovascular fitness (CF), and physical activity (PA) in children with different weight status, and second, to determine the associations between moderate to vigorous physical activity (MVPA) and measures of adiposity [CA and body mass index (BMI)] and CF. A sample of 244 children (boys = 120 and girls = 124), 9.7-10.8 years of age (10.3 +/- 0.3 years), was measured for stature, body mass, waist circumferences, and 20-m multi-stage fitness test. PA was recorded with ankle mounted accelerometer. BMI groups were used to classify children as underweight (UW), normal weight (NW), and overweight (OW). The prevalence of being OW was 21.7 and 25% in boys and girls, respectively. Only 5.3% of the participants were found to accumulate recommended amount (>= 60 min/day) of MVPA. Boys were significantly outperformed girls in terms of CE Moreover, they were significantly more engaged in moderate and vigorous physical activities than girls. Regardless of gender, results indicated that OW children had significantly higher values in all anthropometric parameters and lower level of CF than their UW and NW counterparts. In girls, OW children were found to accrue less time engaging in MVPA than the children in UW and NW groups. In boys, OW children were found to accrue less time engaging in vigorous activities than UW and NW children. Results also showed that there were no significant differences between UW and NW girls and boys in respect to CF. Besides, UW girls were found to accrue more time engaging in MVPA than NW girls. MVPA was found to be significantly and negatively correlated with BMI and waist circumference and significantly and positively correlated with CF in both boys and girls. These discrepancies and associations highlight the considerable influences of MVPA on weight status and CF in children.
