Patients with chronic ankle instability (CAI) show biomechanical and neuromuscular alterations during the performance of functional movements not only at the ankle joint level, but also in more proximal joints and segments. Few studies have been conducted to investigate the effects of chronic ankle instability on neuromuscular control at the knee joint level. The aim of this study is to investigate whenther abnormalities exists in maximal and sub-maximal isometric muscle strength expression in patients with CAI.
Study Type
OBSERVATIONAL
Enrollment
30
Persistent condition of ankle instability after a first ankle sprain episode.
Istituto Ortopedico Rizzoli
Bologna, Italy
Forces exerted by knee extensor and flexor muscles
The forces (N) exerted by knee extensor and flexor muscles will be assessed by means of a dynamometer during maximal and submaximal isometric muscle contractions.
Time frame: Day 1
Knee extensor and flexor muscles activations
Knee extensor and flexor muscles activations (mV) during the maximal and submaximal isometric contractions will be recorded by means of surface electrodes for electromyography.
Time frame: Day 1
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