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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.