The Effect of Balance Training on Unloading Reaction in Individuals With Functional Ankle Instability
|ClinicalTrials.gov Identifier: NCT00703456|
Recruitment Status : Withdrawn
First Posted : June 23, 2008
Last Update Posted : April 19, 2016
The aim of this study is to determine the effect of a balance training intervention on the change in hyper-reactivity to unloading reaction, ankle joint laxity, ankle joint proprioception and evertor muscle weakness in individuals with functional ankle instability (FAI) using quantitative biomechanical and neuromuscular measurements.
We hypothesize that experimental FAI group will demonstrate a significant decline in unloading reaction following balance training while FAI control group will not show a significant decline in unloading reaction without training. We further hypothesize that experimental FAI group will demonstrate a significant improvement in the FAI score after the balance training measured by Ankle Instability questionnaire. Following balance training, there will be a significant correlation between the change in FAI score and change in the unloading reaction in the experimental group.
|Condition or disease||Intervention/treatment|
|Ankle Injury||Behavioral: Balance Training|
Conflicting results have been reported regarding the effect of ankle sprain on the proprioceptive sensation of the ankle, peroneal muscle strength and ankle joint laxity in the past research studies related to FAI. In spite of controversies regarding etiological factors for FAI, balance training has been widely used in sports medicine clinics to treat FAI. Most of these studies have focused on the identification of postural control deficits in patients with FAI rather than trying to understand the mechanism of balance training on etiological factors of FAI.
Hyper-reactivity of the ankle joint with FAI may be an important factor for the ankle "giving way" episode. Patients may develop injury-induced hyper-reactivity for unloading reaction through an adaptation to physical conditions of the ankle joint after injury. Clinical studies performed with selective nerve blocks along with electrophysiology studies performed in animals have led to the generally accepted conclusion that enhanced pain induced by peripheral nerve injury is associated with increased spontaneous and evoked discharges from injured and/or adjacent uninjured nerves. Persistent primary afferent inputs are believed to cause a state of central (i.e. "spinal") sensitization and enhancing responses to sensory inputs i.e. hyper-reactivity.
The ankle "giving way" is a complex phenomenon where any mechanical and neuromuscular factor or a combination of mechanical and neuromuscular factors may be at fault including ankle hyper-reactivity, joint laxity, proprioceptive deficit, and muscle weakness. The purpose of this study is to examine the effect of balance training intervention on the various etiological factors of FAI and to develop an objective measurement for physiological features related to FAI.
The study will help us to understand the mechanism of balance training on FAI and help us to determine the scope and limitations of balance training on FAI subjects in clinical settings to evaluate treatment efficacy.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||0 participants|
|Intervention Model:||Parallel Assignment|
|Official Title:||The Effect of Balance Training on Unloading Reaction in Individuals With Functional Ankle Instability|
|Study Start Date :||June 2008|
|Primary Completion Date :||May 2009|
|Study Completion Date :||May 2009|
Balance Training, 3 times a week for 4 weeks
Behavioral: Balance Training
balance training three days per week for 4 weeks during single limb standing
No Intervention: 2
- Vertical force variation [ Time Frame: 6 weeks ]
- ankle inversion flexibility, ankle proprioception, ankle evertor strength, modified cumberland ankle instability tool questionnaire [ Time Frame: 6 weeks ]
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00703456
|United States, Kansas|
|University of Kansas Medical Center|
|Kansas City, Kansas, United States, 66160|
|Principal Investigator:||Wen Liu||University of Kansas Medical Center|