Objectives: To investigate the reliability and validity of a clinical evaluation method for the assessment of the dynamic postural control in patients with chronic ankle instability (CAI).
Design: Cross-sectional study.
Setting: All tests were conducted at the practice room of the Physical Therapy Department.
Participants: Twenty-nine healthy subjects and 29 patients with CAI were selected.
Interventions: Participants performed twice a multiple hop test within a one-week time interval. Subjects hopped on 10 different tape markers while trying to avoid any postural correction.
Main outcome measurements: The number and type of balance errors were documented by analysing the digital video images.
Results: Test-retest reliability of the number of balance errors was excellent in patients (ICC= .83; SEM= 2.6) and moderate in healthy subjects (ICC= .64; SEM= 2.8). The intra and inter observer reliability was excellent (ICC > .90). Both for the test (p= .000) and for the retest
(p =.000) the number of balance errors in patients was significantly higher (17.9 ± 6.6) when compared with healthy subjects (10.9 ± 4.6). On both test occasions, patients with CAI used significantly more a change-in-support strategy (test: p= .000; retest: p=.000). The number of balance errors was significantly correlated with the time needed to perform the test (r= .60; p= .000) and the perceived difficulty of the hop test as rated on a Visual Analogue Scale (r= .44; p= .014).
Conclusions: The multiple hop test is a reliable and valid test for detecting an impaired dynamic postural control in patients with CAI.
Key words: hop test, joint instability, ankle joint, validation studies, postural control, strategy.
Original languageEnglish
Pages (from-to)107-114
Number of pages8
JournalClinical Journal of Sport Medicine
Issue number2
Publication statusPublished - Mar 2009

    Research areas

  • joint instability, hop test, postural control, validation

ID: 1813285