Equinus Foot Deformity Treatment 2026 | DPM

Equinus Type	Cause	Flexibility	Primary Treatment
Gastrocnemius Equinus	Isolated gastrocnemius tightness	Flexible (improves with knee bent)	Silfverskiöld stretching, gastrocnemius recession
Gastrosoleal Equinus	Both gastrocnemius + soleus tight	Rigid (no improvement with knee bent)	Achilles tendon lengthening (TAL)
Osseous Equinus	Bony block in ankle joint	Rigid — bony end feel	Ankle arthroscopy, exostectomy
Neurogenic Equinus	Cerebral palsy, stroke, TBI	Variable — spastic	Botox, serial casting, TAL
Congenital Equinus	Clubfoot (talipes equinovarus)	Rigid at birth	Ponseti casting, ATTT surgery

Equinus Treatment	Best For	Evidence Level	Timeline
Calf Stretching Protocol	Mild flexible equinus	Strong — 1st line	Daily, 3–6 months
Night Splints / AFO	Plantar fasciitis + equinus	Moderate	Nightly, 2–4 months
Custom Orthotics w/ Heel Lift	Compensatory pronation	Moderate	Ongoing
Botulinum Toxin Injection	Neurogenic / spastic equinus	Strong for CP	3–6 month duration per injection
Gastrocnemius Recession (Strayer)	Isolated gastrocnemius contracture	Strong — minimal morbidity	2–4 weeks NWB, 3 months full recovery
Achilles Tendon Lengthening (TAL)	Severe combined contracture	Strong — diabetic ulcer recurrence prevention	6–8 weeks NWB, 4–6 months recovery

What Is Equinus and Why It Matters

Normal walking requires at least 10 degrees of ankle dorsiflexion during mid-stance. When the Achilles tendon or gastrocnemius muscle is tight, the ankle cannot achieve this range — creating equinus. The foot compensates by collapsing through the arch, pronating, and shifting load forward — driving plantar fasciitis, metatarsalgia, bunion progression, hammertoes, and flatfoot worsening over time.

Testing for Equinus: Silverskiöld Test

The Silverskiöld test measures ankle dorsiflexion with the knee extended (both gastrocnemius and soleus loaded) and then with the knee bent (gastrocnemius relaxed, soleus only). Normal: 10+ degrees with knee extended. If limited with knee extended but normal with knee bent = isolated gastrocnemius equinus. If limited in both positions = combined Achilles equinus.

Causes

Congenital (born with tight posterior structures), acquired from prolonged heel-wearing or sedentary lifestyle (Achilles adapts to shortened position), neurological (spasticity in cerebral palsy, stroke, MS), post-traumatic (Achilles repair or fractures), and idiopathic.

Treatment Spectrum

Conservative: Aggressive daily Achilles and gastrocnemius stretching (proven to improve dorsiflexion over months), night splinting (holds the ankle at neutral during sleep), serial casting for neurological equinus. Stretching must be consistent — 3 sets of 30-second holds, 3 times daily minimum. Surgical: Gastrocnemius recession (for isolated gastrocnemius equinus) or percutaneous Achilles lengthening (for combined equinus) when conservative care fails after 3–6 months.

FAQs

Can equinus be fixed without surgery? Mild-to-moderate equinus often responds to 3–6 months of consistent stretching and night splinting. Severe or longstanding equinus, particularly in neurological conditions, typically requires surgery.

In-Office Treatment at Balance Foot & Ankle

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