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Date of Award


Degree Type

Thesis (On-Campus Access Only)

Degree Name

Master of Physical Therapy (MPT)

First Advisor

John M. Medeiros, PhD, PT

Second Advisor

Ann K. Williams, PhD, PT


Ankle injury is a common problem for many athletes. Many athletes who sustain an ankle injury often report a feeling of "giving way" of the ankle. This problem is called functional ankle instability. Coordination training on an ankle disk has been shown to be an effective means of reducing instability. However, it is not practical for an entire team to be in the training room for coordination training. The purposes of this study were to compare mean differences in postural sway in two groups (control and experimental) of collegiate soccer players prior to and after coordination training, to compare the differences in postural sway of players with and without a history of ankle injury prior to testing and to compare the initial postural sway of players who sustained an ankle injury during the 91-92 soccer season to those players who did not have an ankle injury in that same season. The subjects were 34 male collegiate soccer players with and without a history of ankle injury. Each athlete participated in six different balance tests using the Chattecx Balance System. This system measures amount of postural sway in terms of a dispersion index. After testing, the experimental group (n=17) was instructed in coordination training that was carried out at practice everyday. The control group (n=17) participated in their usual practice regime. At the end of the soccer season all athletes were balanced tested again. Analysis of variance showed no significant difference in any of the variables measured. In this study there is no effect on postural sway with coordination training, no significant difference in dispersion index for those players with a history of ankle injury prior to testing and no significant difference in postural sway of those athletes that were injured during the 91-92 soccer season. These results could be related to the relatively young age of the athletes, to the uncontrolled environment used for coordination training, or to the type of coordination training.


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