Yazar "Zorlular, Ali" seçeneğine göre listele

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    The Effect of Attention Focus Instructions on Strength and Balance in Subjects With Generalized Joint Hypermobility
    (Routledge Journals, Taylor & Francis Ltd, 2024) Zorlular, Ali; Zorlular, Rabia; Elbasan, Bulent; Guzel, Nevin Atalay
    This study aims to examine the effects of different attention focuses on muscle strength and balance performance in individuals with Generalized Joint Hypermobility (GJH). This randomized crossover trial included 32 individuals with GJH whose Beighton score was greater than 5. Subjects performed each task under external attentional focus, internal attentional focus, and neutral attentional focus condition. Knee extensor muscle strength was measured using the Isokinetic Dynamometer. Postural stability was evaluated using the Biodex Balance System, while dynamic balance was assessed using the Y Balance Test. The main effects of attentional focus on the outcomes were analyzed using repeated measures ANOVA and post-hoc corrections with a 95% confidence interval. Subjects produced significantly higher quadriceps peak torque during external focus instruction and internal focus instruction compared to neutral condition (p = .006). Postural stability performance were found to be better during external attention focus compared to the internal focus of attention and the neutral group (p = .008). In addition, an increase in Y balance composite score was observed during external condition compared to internal condition and neutral condition (p < .001). Whether internal or external, the use of attentional focus may be beneficial for optimal force production during training in individuals with GJH. External attention focus enabled better postural stability and dynamic balance performances.
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    The relationship of wrist and shoulder joint isokinetic strength and service and spike velocity in elite female volleyball players
    (2019) Aka, Hasan; Akarçeşm, Cengiz; Aktuğ, Zait Burak; Zorlular, Ali; Güzel, Nevin Aysel; Sökmen, Tamer
    The purpose of the study was to examine the relationship between isokinetic wrist and shoulder strength and service and spikevelocity of the female volleyball players. Totally 34 female volleyball players participated into the study voluntarily. Wrist(60°s-1 and 90°s-1) and shoulder strength (60°s-1 and 180°s-1) of the volleyball players were determined with isokineticdynamometer; and service and spike velocity was determined with radar device. Pearson Correlation Analysis was performedfor determining the relationship between isokinetic wrist and shoulder strength and service and spike velocity of the volleyballplayers. As result of the statistical analysis, whereas no significant relationship was determined between wrist and shoulderisokinetic strength and service and spike velocities of the female volleyball players (p<0,05), positive significant relationshipwas found between wrist and shoulder isokinetic strengths (p<0,05). Considering these results, it was possible to mention thatalthough service and spike velocities of the volleyball players were correlational with the upper extremity strength, only wristor only shoulder strength did not increase the velocity of service and spike, and this appeared by the effect of all upperextremity and bodily muscles. Regarding this, it was considered that volleyball players should develop other variables(strengthening all upper extremity and bodily muscles, improving the technique of spiking, etc.) besides wrist and shoulderstrength in order to improve their service and spike velocity.