



Chronic Ankle Instability:



Strength Deficits

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INTRODUCTION:

After ankle injury, some individuals develop chronic ankle instability and repetitively injure their ankle.

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This can be a frustrating and debilitating problem for many athletes.

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Understanding if specific strength deficits exist can guide and inform the rehab process to resolve chronic ankle instability.

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Khalaj et al. (2020), systematically reviewed the literature to determine whether impairments in lower limb muscle strength exist in individuals with chronic ankle instability (CAI) compared with uninjured controls.

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RESULTS:

12,397 unique studies identified.

20 included.

16 eligible for meta-analysis. .

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Meta-analyses showed individuals with CAI (when compared to controls) had lower:

Eccentric evertor strength

Concentric evertor strength

Eccentric invertor strength

Concentric invertor strength

Concentric knee extensor strength .

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Ankle eccentric dorsiflexor strength was not different between groups. .

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Although pooling was not possible, data from three separate studies indicated individuals with CAI (when compared to controls) had lower::

Hip flexor.

Hip Abductor.

Hip External rotator strength.

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Hip adductor and extensor strength were not lower in individuals with CAI.

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CONCLUSION:

Individuals with CAI have ankle inversion and eversion strength deficits. .

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Differences exist between individuals with CAI and controls in hip and knee strength. .

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These elements of the kinetic chain should be evaluated by clinicians who rehabilitate individuals with CAI.

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Thoughts? Questions? Comments?

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Write them below. .

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SOURCE:

Khalaj N, Vicenzino B, Heales LJ, et al. Is chronic ankle instability associated with impaired muscle strength? a systematic review with meta-analysis. BJSM. Online First: 14 January 2020.





Dalton Urrutia, MSc PT





Dalton is a Physical Therapist from Oregon, currently living and running the performance physiotherapy clinic he founded in London for Grapplers and Strength & Conditioning athletes. Dalton runs the popular instagram account @physicaltherapyresearch, where he posts easy summaries of current and relevant research on health, fitness, and rehab topics.

Want to learn more or contact him?

Reach out online:

@Grapplersperformance

www.grapplersperformance.com





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