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Clinical biomechanics v.41, 2017년, pp.98 - 105  

Squat test performance and execution in children with and without cerebral palsy

Eken, M.M. ; Harlaar, J. ; Dallmeijer, A.J. ; de Waard, E. ; van Bennekom, C.A.M. ; Houdijk, H. ;
  • 초록  

    Background: Knowledge on lower extremity strength is imperative to informed decision making for children with cerebral palsy (CP) with mobility problems. However, a functional and clinically feasible test is not available. We aimed to determine whether the squat test is suitable for this purpose by investigating test performance and execution in children with cerebral palsy and typically developing (TD) peers. Methods: Squat test performance, defined by the number of two-legged squats until fatigue (max 20), was assessed in twenty children with bilateral CP (6-19years; gross motor function classification system I-III) and sixteen TD children (7-16years). Muscle fatigue was assessed from changes in electromyography (EMG). Joint range-of-motion and net torque were calculated for each single squat, to investigate differences between groups and between the 2nd and last squat. Findings: Fifteen children with CP performed o . No differences between 2nd and last squat were observed, except for knee range-of-motion which increased in TD children and decreased in children with CP. Interpretation: Squat test performance was reduced in children with CP, especially in those with more severe CP. Muscle fatigue was present in both children with CP and TD peers, confirming that endurance of the lower extremity was tested. Minor execution differences between groups suggest that standardized execution is important to avoid compensation strategies. It is concluded that the squat test is feasible to test lower extremity strength in children with CP in a clinically meaningful way. Further clinimetric evaluation is needed before clinical implementation.


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