Title | Assessing Functional Ankle Instability with Joint Position Sense, Time to Stabilization, and Electromyography |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | Brown, CN, Ross, S, Mynark, R, Guskiewicz, K |
Journal | Journal of Sport Rehabilitation |
Volume | 13 |
Issue | 2 |
Pagination | 122 - 134 |
Date Published | Jan-05-2004 |
ISSN | 1056-6716 |
Abstract | Context: Functional ankle instability (FAI) is difficult to identify and quantify. Objective: To compare joint position sense (JPS), time to stabilization (TTS), and electromy-ography (EMG) of ankle musculature in recreational athletes with and without FAI. Design: Case-control compared with t tests and ANOVAs. Setting: Sports medicine research laboratory. Participants: 20 recreational athletes. Main Outcome Measures: Passive angle reproduction, TTS, and mean EMG amplitude of the tibialis anterior, peroneals, lateral gastrocnemius, and soleus muscles during single-leg-jump landing. Results: No differences in JPS or medial-lateral TTS measures between groups. Significantly longer anterior-posterior TTS (P < .05) in the unstable ankle group. The stable ankle group had significantly higher mean EMG soleus amplitude after landing (P < .05). No other significant differences were found for mean EMG amplitudes before or after landing. Conclusions: Subjects with FAI demonstrated deficits in landing stability and soleus muscle activity during landing that may represent chronic adaptive changes following injury. |
URL | http://journals.humankinetics.com/doi/10.1123/jsr.13.2.122 |
DOI | 10.1123/jsr.13.2.122 |
Short Title | Journal of Sport Rehabilitation |