الفهرس 
Relation between hip muscles strength and chronic ankle instability in athletic children
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Abstract
Backgrounds : The purpose of this study was to identify the relations between hip muscle strength and chronic ankle instability in athletic children. Methods: Thirty athletic boys with ages ranged from 11-14 years were recruited for this study. They were divided into two groups of equal numbers (control group & study group). The control group consisted of 15 normal athletic male football players (dominant lower limb was measured) while the study group consisted of 15 athletic football player children suffering from unilateral chronic ankle instability (dominant lower limb). Both groups were assessed by measuring maximal isometric muscle force of (hip extensors, abductors and flexors) of the dominant lower limb by Lafayette dynamometry, ankle dorsiflexion range of motion (ROM) in weight-bearing position by standard goniometer and severity of functional ankle instability by (Cumberland ankle instability) to identify the relation between hip muscles strength and chronic ankle instability in athletic children. Results: there was strong inverse significant correlation between chronic ankle instability and hip extensors (R= - 0.606 & p = 0.017) and weak inverse significant correlation between chronic ankle instability and hip abductors as (R= - 0.554 & p = 0.032) and non-significant correlation between chronic ankle instability and hip flexors (R= 0.00 & p = 1.00).
Conclusion: It was concluded that there is a significant relationship between hip extensors and abductors weakness and chronic ankle instability in athletic children