What specific movement pattern(s) does a person with chronic ankle instability have?

image source: https://en.wikipedia.org/wiki/Ligament

...it is unique and depends on their compensation

"The researchers concluded that multiple distinct movement patterns were found in a high percentage of CAI subjects and each person likely incorporates unique positions and loads that contribute to the chronic nature of instability. Additionally, the data revealed distal joint stiffness was lower in those with CAI than controls generally, while proximal joint stiffness was greater than controls. These data support the theory that the hop plays a vital role in controlling lower extremity movement in CAI subjects."

Hopkins JT, Son SJ, Kim J, et al. Joint Stiffness Alterations, Grouped by Movement Strategy, in Chronic Ankle Instability.

http://lermagazine.com/special-section/conference-coverage/identifying-cai-through-specific-movement-patterns