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J Orthop Sports Phys Ther. 2015 Aug;45(8):626-33. doi: 10.2519/jospt.2015.5653. Epub 2015 Jun 24.

Dynamic Balance Deficits 6 Months Following First-Time Acute Lateral Ankle Sprain: A Laboratory Analysis.

Author information

1
School of Public Health, Physiotherapy and Population Science, University College Dublin, Dublin, Ireland.

Abstract

STUDY DESIGN:

Controlled laboratory study.

OBJECTIVE:

To utilize kinematic and stabilometric measures to compare dynamic balance during performance of the Star Excursion Balance Test between persons 6 months following first-time lateral ankle sprain (LAS) and a noninjured control group.

BACKGROUND:

Biomechanical evaluation of dynamic balance in persons following first-time LAS during performance of the Star Excursion Balance Test could provide insight into the mechanisms by which individuals proceed to recover fully or develop chronic ankle instability.

METHODS:

Sagittal plane kinematics of the lower extremity and the center-of-pressure path during the performance of the anterior, posterolateral, and posteromedial reach directions of the Star Excursion Balance Test were obtained from 69 participants 6 months following first-time acute LAS and from a control group of 20 noninjured participants.

RESULTS:

Compared to the control group, the LAS group displayed lower normalized reach distances in all 3 reach directions on the injured and noninjured limbs, with the largest observed effect size in the posterolateral direction (P = .001, ╬Ěp(2) = 0.07). The performance impairment was associated with less hip and knee flexion and ankle dorsiflexion at the point of maximum reach (P<.02), and coincided with less complexity of the center-of-pressure path (P<.05).

CONCLUSION:

Participants with a 6-month history of LAS exhibit a persistence of deficits previously established in the acute phase of injury.

KEYWORDS:

ankle joint; biomechanical phenomena; kinematics; kinetics; postural balance

PMID:
26107043
DOI:
10.2519/jospt.2015.5653
[Indexed for MEDLINE]

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