Examination of Static and Dynamic Postural Stability in Individuals With Functionally Stable and Unstable Ankles

Abstract

Individuals with functional ankle instability took significantly longer to stabilize than individuals with stable ankles after a single-leg jump landing. Differences between groups were not detected with mean sway measured during single-leg stance.

Postural stability and lower leg muscle activity during a diagonal single-leg landing differs in male collegiate soccer players with and without functional ankle instability

“…This suggests that individuals with FAI have a postural stability deficit in the lateral direction. The previous studies also support a postural stability deficit for the lateral direction, even when the conducted test was a forward landing 34,35) . The lateral ligaments of the ankle, such as the anterior talofibular and calcaneofibular, restrict ankle inversion, which is susceptible to damage by an ankle sprain.…”

“…Nevertheless, there is no consensus about postural deficit in the individuals with FAI. While findings from several cross-sectional studies have highlighted the postural deficits during landing tasks in those with an unstable ankle 19,20,34,35) , Staib et al 21) have reported no significant difference in postural stability between individuals with and those without FAI. The contradictory results may arise because of variation in the balance ability, which is different among various sports 22) and improved by balance disk training 26,37) .…”

Comparision of dynamic and static balance in adolescents handball and soccer players

“…Dynamic balance is supported to be more challenging because it requires the ability to maintain equilibrium during a transition from a dynamic to a static state. Both static and dynamic balance require integration of visual, vestibular, and proprioceptive inputs to produce an efferent response to control the body within its base of support (25,33). There are findings that better balance ability of the players is the result of the ability of paying attention to the proprioseptive and visual clues (4).…”

Possible Factors Related to Functional Ankle Instability

“…All subjects were tested bilaterally for (1) quiet standing on single-limb stance to test balance control, 10,26,32 (2) reproduction of passive ankle positioning to evaluate ankle proprioception, 2,39 (3) reaction to a sudden inversion to measure the evertors response time, (4) passive ankle stiffness to detect ligament disruptions and potential joint laxity, 3,4 and (5) maximal isometric ankle eversion strength to assess the evertor muscles. 17,37 During balance control test, subjects stood barefoot in a single-limb stance on the force platform.…”