EMG Analysis During Static Balance in Chronic Ankle Instability, Coper and Controls
This study
aimed to compare muscle activity in the lower extremity and postural control
among individuals with CAI, copers and uninjured controls during a static
balance test. A total of 57 physically active participants were categorized into
three groups (CAI, copers and controls) and performed a single-leg balance test
with two visual conditions: eyes open and eyes closed. Muscle activity in six
lower extremity muscles and center of pressure (CoP) variables were recorded and
analyzed. Patients with CAI exhibited greater muscle activity in the medial
gastrocnemius and gluteus maximus compared to controls or copers, regardless of
the visual condition. Copers displayed increased gluteus medius activity
compared to controls. Additionally, all groups demonstrated increased muscle
activity and CoP variables when visual feedback was disrupted. These findings
suggest that patients with CAI may have less effective recruitment of motor
units during static balance. On the other hand, greater muscle activity in the
gluteus medius in copers may represent a coping mechanism to avoid further ankle
injuries. Further research on muscle activity during dynamic postural control is
warranted to explore sensorimotor alterations in patients with CAI. [...] Georg Thieme Verlag Rüdigerstraße 14, 70469 Stuttgart,
GermanyArticle i...
Source: International Journal of Sports Medicine - Category: Sports Medicine Authors: Han, Seunguk Oh, Minsub Lee, Hyunwook Hopkins, J. Ty Tags: Orthopedics & Biomechanics Source Type: research