Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
Balance Foot & Ankle offers same-day appointments for urgent foot and ankle conditions across Southeast Michigan — but the most important factor in outcomes isn’t getting seen quickly. Our podiatrists explain what to do in the first 24-48 hours before your appointment that most patients skip entirely. Call (810) 206-1402 — expert podiatric care across Michigan.
Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
The most important clinical decision with Lateral Ankle Instability Guide Michigan Podiatrist isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
The Lateral Ankle Ligament Complex
Three ligaments stabilize the lateral ankle: the anterior talofibular ligament (ATFL), the calcaneofibular ligament (CFL), and the posterior talofibular ligament (PTFL). The ATFL — the most frequently injured ankle ligament in the body — is under maximum tension in plantarflexion and resists anterior talar translation. The CFL resists inversion in the neutral ankle position and is the second most commonly injured. The PTFL is rarely torn in isolation. Together, the ATFL and CFL are the primary static stabilizers preventing the ankle from rolling inward.
After an acute lateral ankle sprain, the injured ligament heals with scar tissue — structurally inferior to the original ligament architecture. If this healing is sufficient, the ankle regains stability. If not — due to severe initial tear, inadequate rehabilitation, or recurrent sprains before healing is complete — the ligament remains lax and chronic mechanical instability develops.
Why Chronic Instability Develops
Multiple factors contribute to the development of CLAI after acute sprains. Failure to complete appropriate rehabilitation — specifically, peroneal strengthening and proprioception retraining — leaves the dynamic stabilizers of the ankle undertrained, unable to compensate for the ligamentous laxity. High activity levels with early return to cutting sports before ligament healing is complete re-injure the partially healed ATFL, preventing adequate scar tissue formation.
Anatomic factors including a varus heel alignment (the hindfoot tips inward) place the lateral ligaments under constant supinatory stress, predisposing to both sprains and instability. Generalized ligamentous laxity, common in hypermobile individuals, compounds this — the lateral ankle ligaments may heal inadequately even with appropriate rehabilitation. Neuromuscular deficits from the initial sprain — reduced proprioceptive signaling from the damaged joint mechanoreceptors — impair the reflexive peroneal response that normally protects the ankle during inversion events.
Symptoms of Chronic Lateral Ankle Instability
Patients with CLAI report recurrent ankle rolling or giving-way — both during sports and during ordinary activities on uneven terrain. The ankle may feel “loose” subjectively. Activities including trail running, basketball, tennis, and hiking provoke instability episodes. Many patients begin unconsciously avoiding activities that involve lateral cutting, running on uneven surfaces, or high-speed direction changes — a functional restriction that significantly impacts quality of life and sports participation.
Ongoing pain with activity, particularly over the anterior lateral ankle and sinus tarsi region, reflects the secondary synovitis and capsular irritation that accompanies mechanical instability. Sinus tarsi syndrome — pain and fullness in the sinus tarsi space from chronic lateral ankle laxity — is a frequent concomitant diagnosis.
Diagnosis and Assessment
The anterior drawer test is the primary clinical assessment: with the ankle in slight plantarflexion, the examiner stabilizes the tibia and translates the talus anteriorly. Increased anterior translation compared to the contralateral ankle, or a soft end-point without a firm ligamentous stop, indicates ATFL laxity. The talar tilt test evaluates CFL integrity: the heel is inverted while the examiner palpates for increased talar tilting.
Stress X-rays under controlled inversion and anterior drawer force objectively measure instability. MRI characterizes the ligament anatomy — chronically insufficient ligaments appear thinned, elongated, or scarred — and identifies concomitant pathology including osteochondral lesions, peroneal tendon tears, and sinus tarsi disease that frequently accompany CLAI. The presence of concomitant pathology influences surgical planning.
Conservative Treatment
Structured physical therapy is the foundation of conservative management. The peroneal muscles are the primary dynamic ankle stabilizers — a rigorous peroneal strengthening program using resistance bands and progressive functional exercises substantially improves dynamic stability even in mechanically lax ankles. Proprioception training on unstable surfaces (wobble boards, foam pads) retrains the neuromuscular response that protects the ankle during inversion events. A 3–6 month structured program is required for fair assessment of conservative outcomes.
Ankle bracing provides external mechanical support during activity, reducing instability episodes and allowing athletic participation. Braces reduce the risk of inversion sprain recurrence by approximately 50% in the literature — a clinically meaningful reduction for active patients. Custom-fitted semi-rigid braces offer the best combination of protection and proprioceptive feedback.
The Brostrom-Gould Procedure
When rehabilitation fails to restore adequate functional stability, the Brostrom-Gould procedure is the surgical gold standard. The surgery involves anatomic repair of the ATFL (and CFL if involved) using imbrication sutures — tightening the lax ligament tissue — augmented by advancement of the inferior extensor retinaculum (Gould modification) to reinforce the repair. This augmentation significantly reduces recurrence compared to the original Brostrom repair alone.
The Brostrom-Gould is performed through a small lateral ankle incision, typically as an outpatient procedure under local or regional anesthesia. Post-operatively, patients are in a boot or cast for 4–6 weeks, then transition through progressive rehabilitation to full sport return at 4–6 months. Long-term outcomes are excellent — over 90% of patients report satisfactory stability at 10-year follow-up. For patients with hyperlaxity or revision surgery needs, internal brace augmentation with suture tape provides additional structural reinforcement of the repair.
Dr. Tom's Product Recommendations
McDavid Ankle Brace with Stabilizer Strap
⭐ Highly Rated
Lace-up ankle brace with medial and lateral stabilizer straps — the combination that provides superior inversion resistance for chronic lateral ankle instability. Designed for athletic use with a low profile that fits in most shoes.
Dr. Tom says: “My podiatrist recommended this brace after my third ankle sprain. I’ve been able to return to basketball without further instability episodes and it fits in my shoes without issue.”
Chronic lateral ankle instability, recurrent ankle sprains, return-to-sport support
Post-surgical stabilization — follow your surgeon’s specific brace recommendations after Brostrom repair
Disclosure: We earn a commission at no extra cost to you.
BOSU Balance Trainer
⭐ Highly Rated
Half-dome balance platform for progressive proprioception and peroneal strength rehabilitation — the cornerstone of conservative CLAI management. Single-leg balance training on unstable surfaces retrains the ankle’s neuromuscular defense mechanism.
Dr. Tom says: “My PT used this for my ankle stability training after chronic instability. Two months of progressive single-leg work and I went from rolling my ankle monthly to zero episodes in six months.”
Peroneal strengthening and proprioception retraining for chronic ankle instability
Acute sprains — balance training begins only after pain and swelling have resolved sufficiently
Disclosure: We earn a commission at no extra cost to you.
Zamst A2-DX Ankle Brace
⭐ Highly Rated
Medical-grade semi-rigid ankle brace with bilateral exoskeletal straps providing the highest level of lateral and medial ankle protection available in an OTC device. Endorsed by orthopedic and podiatric sports medicine specialists for high-instability cases.
Dr. Tom says: “After years of chronic ankle instability, my podiatrist recommended this brace as the best non-surgical option before deciding on surgery. It’s the most supportive brace I’ve tried and has cut my instability episodes dramatically.”
Severe chronic lateral ankle instability, high-impact sports, patients deferring surgery
Those with mild instability — this level of support may restrict performance in athletes with minor laxity
Disclosure: We earn a commission at no extra cost to you.
✅ Pros / Benefits
- Structured physical therapy with peroneal strengthening restores functional stability in many CLAI patients without surgery
- The Brostrom-Gould procedure has excellent 10-year outcomes with over 90% patient satisfaction
- Internal brace augmentation extends surgical options to patients with hyperlaxity who were previously considered poor surgical candidates
- Early treatment prevents the progressive chondral damage and ankle arthritis that develops from years of untreated instability
❌ Cons / Risks
- Conservative treatment requires 3–6 months of committed rehabilitation — a real investment of time and effort
- Mechanical instability from severely attenuated ligaments may not respond adequately to conservative care regardless of rehabilitation quality
- Brostrom surgery requires 4–6 months to return to full sport — a significant commitment for competitive athletes
- Concomitant pathology (OCD, peroneal tears, sinus tarsi disease) increases surgical complexity and may affect recovery timeline
Dr. Tom Biernacki’s Recommendation
Chronic lateral ankle instability is the condition where I see the biggest gap between what patients have been told and what’s actually going on. ‘Just tape it before games’ and ‘wear a brace’ are reasonable short-term management strategies — but they don’t address why the ankle is unstable. The ligament didn’t heal properly. Rehabilitation can strengthen the dynamic stabilizers substantially, but it cannot repair the ATFL if it’s chronically lax and elongated. When a patient has done 3–4 months of real PT and their ankle is still rolling regularly, we have a frank conversation about the Brostrom. The outcomes are consistently excellent — it’s one of the most reliable surgeries in my repertoire. And the alternative — decades of instability, recurrent sprains, and progressive cartilage damage — is a far worse outcome than a single well-performed Brostrom. — Dr. Tom Biernacki, DPM, Balance Foot and Ankle PLLC
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
How do I know if I have chronic ankle instability?
Signs include recurrent ankle rolling (giving way) during ordinary activities or sports, a persistent feeling of ankle looseness, and avoidance of activities involving uneven terrain or lateral cutting. A positive anterior drawer test on clinical examination and MRI showing ATFL laxity confirm the diagnosis.
Can chronic ankle instability be treated without surgery?
Yes — for many patients. Structured rehabilitation emphasizing peroneal strengthening and proprioception training, combined with ankle bracing for activity, significantly improves stability and reduces instability episodes. Surgery is recommended when 3–6 months of good rehabilitation fails to restore adequate function.
What is the Brostrom procedure?
The Brostrom-Gould is the gold-standard surgical repair for chronic lateral ankle instability. It involves tightening and repairing the lax ATFL and CFL ligaments through a small lateral ankle incision, reinforced with the inferior extensor retinaculum (Gould augmentation). It restores anatomic ligament function with excellent long-term outcomes.
How long is recovery from ankle instability surgery?
Patients are typically in a boot or cast for 4–6 weeks after Brostrom-Gould repair, then progress through physical therapy. Return to sport occurs at 4–6 months. Most patients achieve full sport return with excellent stability. Physical therapy after surgery is essential for optimal outcomes.
Does chronic ankle instability cause arthritis?
Yes — long-term untreated instability leads to repetitive microtrauma to the ankle cartilage, particularly the talar dome. Osteochondral lesions (cartilage damage) and early ankle arthritis are well-documented long-term consequences of untreated CLAI. Treating instability promptly protects the joint cartilage from this progressive damage.
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When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
In-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your ankle condition, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
Ready to get relief? Book an appointment at Balance Foot & Ankle or call (810) 206-1402. Same-day appointments available in Howell & Bloomfield Hills, MI.
AAOS: Chronic Ankle Instability
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Same-day appointments available in Howell & Bloomfield Hills, MI
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Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.