The aim of this study was to examine the effect of differential learning activities on young football players’ skills. Athletes who had played active football for at least 2 years in the youth teams participating in competitions in Amateur Leagues in Istanbul, Turkey took part in the study, as the Experimental Group (EG; n=26, age=12.03±0.44) and Control Group (CG, n=26, age=12.05±0.46). In the study, differential learning exercises integrated into their training programme for a period of 8 weeks, 3 days per week, were applied to the players in the EG immediately following warm-up, while the players in the CG continued with their traditional training programmes. The Illinois Test with Ball (ILL), Creative Speed Test (CST), Ball-Dribbling Test (DT), Ball-Juggling Test (JT) and Passing Test (PT) were carried out with all players participating in the study as a pretest prior to commencement of the programme and as a posttest following the implementation of the programme, and the gathered data were analyzed statistically. The findings obtained revealed that in the within-group pretest and posttest, players in the EG showed a statistically significant improvement in all parameters (p<0.05), while players in the CG showed a statistically significant improvement in ILL, CST, JT and PT (p<0.05). When the differences in development of the groups were compared, a statistically significant difference in the ILL, CST and DT parameters was determined in favor of the players in the EG (p<0.05). Consequently, although regularly-performed classic football training develops skills, it is seen that differential learning exercises integrated into training programmes are more effective for dribbling skills. It is considered that differential learning exercises, in which the non-dominant leg is frequently used, can make it easier for players to apply the necessary skills by allowing them to give more effective responses to the tricky positions encountered in football, and that these exercises can support the development of players’ performances.

There are various training programs to improve sportive performance so that soccer-specific technical skills can be realized more easily. The aim of the study is to examine the effect of the training program that including eccentric and concentric contractions on strength, balance and agility in young soccer players. 26 male soccer players (age:12±1.6years) who played in an amateur sport club participated voluntarily to the study. Pretests were taken before the training program. There were two groups of athletes; the experimental group (EG; n=13) were applied exercises that including eccentric and concentric contractions while Control Group players (CG; n=13) continued their traditional soccer trainings. The post-tests were taken at the end of the 8-week training program. Pre-and post-test included flamingo balance test (FB), y balance test (YB), standing long jump test (SLJ), vertical jump test (VJ) and Illinois test (IT). When the obtained data were examined, EG athletes were statistically improved in all the parameters in the pre-, and post-test (p<0.05) and no statistically significant difference was seen in the CG athletes (p>0.05). When the differences between the groups were examined, it was statistically significant in the y balance test (p<0.05; p=0.032) and Illinois test (p<0.05; p=0.022) parameters for respectively determining the dynamic balance and agility of EG athletes compared to CG athletes (p<0.05). As a conclusion, eccentric and concentric contraction exercises performed before soccer specific training programs seem to be effective on dynamic balance and agility. It is also thought that such training programs could improve the performance of the athletes, and prevent them from lower extremity injuries.

Amaç: Farklı mevkilerde oynayan futbolcularda vücut kitle indeksi (VKİ), denge ve çeviklik özelliklerinin karşılaştırılması ve birbirleriyle ilişkilerinin incelenmesi amaçlanmıştır. Materyal ve Yöntem: Araştırma İstanbul süper amatör liginde çeşitli takımlarda farklı mevkilerde oynayan 44 amatör futbolcu üzerinde yürütülmüştür. Araştırmada, futbolcularda VKİ, denge, topla çeviklik ve topsuz çeviklik ölçümleri yapılmıştır. Değişkenlerin ortalama değerleri alınarak, gruplar arasındaki farkları bulmak amacıyla Kruskal Wallis nonparametrik varyans analizi kullanılmıştır. Değişkenlerin birbirleriyle olan ilişkisini araştırmak için ise Pearson korelasyonu uygulanmıştır. Bulgular: Ölçümler sonucunda, mevkiler arasında karşılaştırıldığında vücut ağırlığ ölçümlerinde (p<0,01) ve VKİ ölçümlerinde (p<0,05) istatistiksel farklılığa rastlanırken, diğer parametreler arasında istatistiksel farklılığa rastlanmamıştır (p>0,01). Futbolcular üzerinde yapılan korelasyon sonucunda, vücut ağırlığı ile topla çeviklik, VKİ ile topla çeviklik ve vücut ağırlığı ile VKİ değişkenleriarasında istatistiksel olarak anlamlı ilişki tespit edilmiştir (p<0,01). Sonuçlar: Yapılan değerlendirmeler sonucunda, futbolcuların VKİ ile top sürme becerileri arasında ilişki tespit edilirken, futbolcuların eksik yönlerine ve mevkilerine bakılmaksızın yapılan tekdüze çalışmalar nedeniyle oyuncuların çeviklik ve denge gibi parametrelerinde farklılıklar görülmemektedir. Sonuçta, futbolcuların oynadıkları mevkilerine, ek denge çalışmalarına ve tespit edilen eksikliklere yönelik düzenlenecek optimal antrenman programlarının yanısıra sporcuların boylarına uygun ideal vücut ağırlıklarını koruyacak şekilde diet programı uygulamaları oyuncularınperformanslarının ve sportif becerilerinin gelişimine katkı sağlayabilir.Topla çeviklik, Topsuz çeviklik.. Aim: The purpose of this study was to compare of body mass index (BMI), balance and agility features of soccer players at different positions and to investigate the relation between these features. Material and Methods: Research was carried out on 44 amateur soccer player whom played in different positions in various teams that compete in amateur league of İstanbul. In the research, it was tested vki, balance, agility with ball and agility without ball on soccer players. The average of variables was taken and Kruskal Wallis nonparametric variance analysis was used to determine the difference between groups. Pearson correlation was used to determine correlations between variables. Results: As a result of measuments, when compare between positions, it was found that there was a statistical difference on body mass measurement (p<0,01) and BMI measurements (p<0,05), as there wasn't found any statistical differences between other parameters (p>0,01). As a result of correlations, it was found statistically significant relation between body mass and agility with ball between BMI and agility with ball and between body mass and BMI variables (p<0,01). Yayın Bilgisi Conclusion:As a result of assesstments it has been revealed that ...

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