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Öğe Effectiveness of Vertical versus Horizontal Plyometric Training on Stretch-Shortening Cycle Performance Enhancement in Adolescent Soccer Players(Mdpi, 2023) Kurt, Cem; Canli, Umut; Erdas, Sadullah Erdal; Poli, Luca; Carvutto, Roberto; Cataldi, Stefania; Fischetti, FrancescoPlyometric exercise is a major tool for improving explosive actions. This study aimed to compare the efficacy of a vertical and horizontal plyometric training program on stretch-shortening performance variables in adolescent soccer players. Thirty-two male soccer players (aged 12.09 +/- 0.89 years, with soccer experience 5.37 +/- 1.58 years) were divided into horizontal plyometric, vertical plyometric, or control groups. The horizontal and vertical plyometric groups participated in a 6-week training program that was performed twice per week, with a 48-h interval, in conjunction with regular soccer training. The control group participated only in regular soccer training. Vertical jump height, reactive strength index, leg stiffness, ground contact time, standing long jump distance, agility, and 10 and 20 m sprint performances were tested as stretch-shortening performance variables of the participants. Stretch-shortening performance variables were assessed before and after completion of the training program. The results showed that either horizontal or vertical plyometric training had no effect on VJH, RSI, GCT, or Kleg performance (F = 2.14, 1.32, 0.66, 1.03; p > 0.05). Furthermore, there was no effect on SLJ, 10 m sprint, 20 m sprint, or agility performance (F = 2.06, 0.14, 0.06, 0.27; p > 0.05). A 6-week horizontal or vertical plyometric intervention was found to be insufficient to elicit stretchshortening performance enhancement in adolescent male soccer players. Although there was no performance change in any group, it was observed that the players enjoyed plyometric training. Therefore, coaches could safely use plyometric exercises to design enjoyable training programs.Öğe Effects of Upper Body Anthropometrics and Handgrip Strength on Ball Velocity in Female Handball Players(2021) Canlı, Umut; Kurt, Cem; Atalağ, OzanThe aim of this study is to analyze the relationship between ball velocity thrown from two different positions, parameters of upper body anthropometrics and hand grip strength as a marker of upper body strength. Twelve well-trained female handball players (age, 22.47±4.57 years; body mass, 66.70±11.05 kg; height, 167.33±7.41 cm; handball experience, 9.91±3.47 years), playing in a team that competes in the first division of the Handball League of Turkey joined this study. Body weight, height, body mass index (BMI), body fat percent and trunk muscle mass, hand length and breadth, sitting height, arm span index and dominant hand grip strength measured by using a stadiometer, bioelectric impedance device, anthropometric set, fiberglass measuring tape and hand grip dynamometer respectively. Ball velocity was measured with a speed radar for both throwing positions (throws are made from a sitting position either with a non-throwing hand on the floor (RP) or non-throwing arm free (RS). According to hierarchical multiple regression analysis carried out; the original contribution of fat percentage, trunk muscle mass, BMI and handgrip strength included in the model in the first step is not significant within the model and both RP and RS were not able to predict ball velocity (p>0.05). It was also determined that hand length, hand breadth, sitting height and arm span index which were included in the model in the second step were not significant and did not predict the ball velocity for both RP and RS as well (p>0.05). However, there was a positive relationship between trunk muscle mass and ball velocity with RP (r = 0.831; p<0.05). No relationship was found between other variables and ball velocity for both RP and RS. According to the results of the study, handball players and their coaches might consider designing resistance training programs that put an emphasis on increasing trunk muscle mass to increase the ball velocity during over arm throws.Öğe Exploring the Relationship Between Motor Competence and Physical Performance in Preschool Children: A Cross-Sectional Study(Federacion Espanola Asoc Docentes Educacion Fisica-Feadef, 2024) Canli, Umut; Kurt, Cem; Prieto-Gonzalez, PabloObjectives: Motor competence (MC) and physical fitness are important factors for a healthy life over time. This study aimed to assess the association between motor competence and physical performance in children aged 4-6 years. Methods: One hundred thirty-nine children (78 boys and 61 girls) were recruited for the study from a preschool in Tekirdag province, Turkey. Their motor competence was evaluated by the K & ouml;rperkoordinationstest f & uuml;r Kinder (KTK+3) test battery combined with an alternating one-handed ball-catching and -throwing task on the first day of the study. On the second day of the study, the children underwent a series of performance tests, including the static and dynamic balance test, pro-agility test, and countermovement jump test. Results: Partial correlation analyses showed no association between motor competence and any performance test results. Fisher's r-to-z analysis test also indicated that gender did not differentiate the results in terms of the potential association between motor competence and performance test results. Conclusion: No significant association was found between motor competence and physical performance in children aged 4-6 years. Gender did not influence this relationship either. These findings suggest that further research with larger and more diverse samples is needed to better understand the link between motor competence and physical performance in early childhood.Öğe Relationship Between Soccer-Specific Skills and Skill-Related Fitness in Adolescent Soccer Players(2022) Kurt, Cem; Viran, Süleyman; Canlı, UmutThe purpose of this study was to examine the relationship between soccer-specific skills and skill-related fitness in adolescent football players. Thirty male soccer players (age: 15.86 ± 0.69 years; football experience 7.10 ± 1.70 years) were recruited from a soccer team. Soccer players performed both soccer-specific skill tests and skill-related fitness tests. Soccer-specific skill tests included the Loughborough soccer passing test, Yeagley soccer test, Mor–Christian general soccer ability skill test, and the skill-related fitness tests consisted of the alternate-hand wall-toss test, countermovement jump test, sport-specific core muscle strength and stability plank test, pro-agility test, 20-m sprint test, and lower-quarter Y balance test. Pearson product-moment correlation analyses revealed a moderately positive correlation among the Mor–Christian general soccer ability skill test score (dribbling), pro-agility test score (r = 0.44, p = 0.01), and 20-m sprint time (r = 0.43, p = 0.01). There were no correlations among other variables for both the soccer-specific skill tests and skill-related fitness tests. Based on the findings of the study, we conclude that dribbling drills in soccer should be supported by agility and sprint exercises to increase dribbling speed by soccer trainers and soccer players.
