Chronic Ankle Instability: Why Your Ankle Keeps Giving Way

Quick answer: Treatment for chronic ankle instability giving way treatment options follows a stepwise approach: 1) conservative care first (rest, ice, supportive footwear, OTC anti-inflammatories), 2) physical therapy and targeted exercises, 3) in-office treatments (injections, custom orthotics) if conservative fails at 4-6 weeks, 4) surgery for refractory cases. Most patients resolve at step 1 or 2. Call (810) 206-1402.

Chronic ankle instability (CAI) affects an estimated 20–40% of people who suffer an acute ankle sprain — the ankle never fully regains its normal mechanical and neuromuscular stability, resulting in a pattern of recurring sprains, giving way episodes, and persistent lateral ankle pain that significantly limits activities and athletic participation. Understanding why instability develops and what the treatment options actually are helps patients navigate their care from ankle brace to potential surgery.

What Causes Chronic Instability After a Sprain?

After an acute ankle sprain, two types of deficits can persist and drive chronic instability:

• Mechanical instability — structural laxity from ligamentous disruption or elongation that allows abnormal joint motion. On clinical examination, the anterior drawer test and talar tilt test demonstrate excessive laxity. This occurs when the lateral ligaments (particularly the ATFL) have healed in a lengthened position, are scarred rather than mechanically restored, or have not healed adequately.
• Functional instability — the neuromuscular system has not recovered its ability to detect and respond to destabilizing forces at the ankle. Mechanoreceptors in the ankle ligaments and capsule detect joint position and send feedback to the peroneal muscles (the dynamic stabilizers) to activate in time to prevent inversion. After ligament injury, this feedback loop is disrupted — the peroneals activate too slowly to prevent the ankle from “going over.”

Most patients with CAI have elements of both mechanical and functional instability, though one may predominate.

Symptoms of Chronic Ankle Instability

• Recurring ankle sprains — often with trivial mechanisms (stepping off a curb, walking on uneven ground)
• Sensation of the ankle “giving way” — a momentary loss of control that may or may not result in a full sprain
• Chronic lateral ankle pain and stiffness
• Anxiety about ankle reliability — patients avoid activities where they fear the ankle will give way
• Weakness of the peroneal muscles on clinical testing
• Positive anterior drawer and talar tilt on stress testing

Associated Conditions

Chronic ankle instability is frequently associated with concurrent pathology that must be identified and addressed:

• Osteochondral lesions of the talus — present in up to 50% of patients with CAI; the repeated instability episodes cause cartilage damage
• Peroneal tendon pathology — peroneal tendinopathy, longitudinal tearing, and subluxation from repetitive loading during instability episodes
• Ankle impingement — anterior or posterior scar tissue that causes pain at end-range ankle motion

Non-Surgical Treatment

Physical Therapy: The Foundation

A structured rehabilitation program targeting the specific deficits of CAI produces excellent results when performed consistently:

• Peroneal muscle strengthening — progressive resistance training targeting eversion and dorsiflexion strength
• Proprioception and balance training — single-leg balance exercises, balance board training, perturbation training; restoring the neuromuscular feedback loop is the most important functional intervention
• Sport-specific agility training — progressing toward the activities that provoke giving way

Ankle Bracing

Functional ankle braces (lace-up braces, hinged braces) reduce the risk of recurrent sprain during rehabilitation and return to sport. Bracing works primarily by: improving proprioceptive feedback through skin compression, limiting extreme inversion range of motion mechanically, and providing psychological confidence to participate in activities. Bracing is a tool for sport participation — it does not restore ligamentous integrity.

Custom Orthotics

Custom orthotics with lateral rearfoot wedging (lateral heel post) may reduce the tendency toward inversion by maintaining the foot in a slightly everted position. This is an adjunct, not a standalone treatment for mechanical instability.

Surgical Treatment: Lateral Ankle Ligament Reconstruction

Surgery is appropriate for patients with confirmed mechanical instability who have failed a minimum of 3–6 months of dedicated rehabilitation. The gold standard procedure is the modified Broström-Gould lateral ankle reconstruction:

• The ATFL and CFL are imbricated (shortened and tightened) to restore normal mechanical tensioning
• The inferior extensor retinaculum is reinforced over the repair (the “Gould modification”) — this adds important additional mechanical reinforcement
• The procedure is performed through a small curved incision over the lateral ankle
• Success rates of 85–95% are reported in the literature for return to sport and elimination of giving way

Recovery involves 2 weeks non-weight-bearing, followed by progressive weight-bearing in a boot, and return to sport at 4–6 months. Post-operative rehabilitation focusing on proprioceptive training is essential to maintain the functional gains from the structural repair.

In-Office Treatment at Balance Foot & Ankle

If home treatment isn’t providing relief for your ankle sprains, our podiatry team at Balance Foot & Ankle can help with expert evaluations and advanced in-office care.