Gastrocnemius Recession vs. Achilles Tendon Lengthening

Reviewed by Dr. Tom Biernacki, DPM, FACFAS

Board-certified foot & ankle surgeon · 3,000+ surgeries · @MichiganFootDoctors (950K+ subscribers)

Last reviewed May 11, 2026 · (810) 206-1402

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Township, MI. Last updated April 2026.

Equinus contracture — restricted ankle dorsiflexion — is one of the most consequential biomechanical abnormalities in the foot and ankle. It acts as a global deforming force, transferring pathological loads to the forefoot, midfoot, and plantar fascia, contributing to plantar fasciitis, metatarsalgia, flatfoot progression, diabetic forefoot ulceration, and Charcot neuroarthropathy. Surgical correction via gastrocnemius recession or Achilles tendon lengthening is a foundational procedure in podiatric surgery, with technique selection critically influencing both outcomes and complications.

Silfverskiöld Test: Isolating the Contracture

The Silfverskiöld test is the essential diagnostic tool. The examiner measures passive ankle dorsiflexion with the knee fully extended (gastrocnemius under tension) and then with the knee flexed to 90° (gastrocnemius relaxed, soleus isolated). A positive Silfverskiöld test — improvement of 10° or more in dorsiflexion with knee flexion — indicates isolated gastrocnemius contracture, making the patient a candidate for isolated gastrocnemius recession rather than Achilles lengthening. Equinus that persists with the knee flexed indicates combined gastrosoleus contracture requiring Achilles lengthening or more aggressive release. This distinction is clinically critical: unnecessarily lengthening the soleus component weakens plantarflexion push-off and risks overlengthening.

Gastrocnemius Recession Techniques

The Strayer procedure — transection of the gastrocnemius aponeurosis at the musculotendinous junction on the medial posterior leg — is the most commonly performed isolated gastrocnemius recession. It provides predictable correction of isolated gastrocnemius contracture while preserving full soleus function and plantarflexion power. The Baumann procedure performs the release more proximally, and endoscopic gastrocnemius recession (EGR) techniques have gained popularity for their smaller incision and faster recovery. In the diabetic or neuropathic patient, gastrocnemius recession dramatically reduces forefoot plantar pressure and is increasingly performed as an adjunct to forefoot ulcer off-loading and plantar pressure redistribution.

Achilles Tendon Lengthening Techniques

When the Silfverskiöld test is negative — contracture persists with knee flexion — Achilles lengthening is required. The Hoke triple hemisection technique (three staggered partial tenotomies that allow the tendon to lengthen under controlled load) is the standard percutaneous approach. It is efficient and minimally invasive but requires precise technique to avoid inadvertent complete tendon transaction. Open Z-lengthening (two parallel cuts creating proximal and distal flaps that overlap and are repaired at the desired length) is preferred when greater and more controlled correction is needed, particularly in spastic equinus or rigid contracted tendons in revision cases. The primary risk of Achilles lengthening is overlengthening — producing calcaneal gait from loss of push-off power — which is far more disabling than the original equinus. A target of 5–10° of dorsiflexion with the knee extended is appropriate; aiming for greater correction invites calcaneal deformity.

Clinical Applications

Gastrocnemius recession and Achilles lengthening are performed as isolated procedures or in combination with reconstructive surgery for flatfoot deformity, diabetic ulcer off-loading, Charcot midfoot reconstruction, plantar fasciitis refractory to non-surgical care, and residual equinus in club foot correction. In the diabetic patient, the evidence that Achilles lengthening reduces forefoot plantar pressure and recurrent ulceration rates is substantial — multiple randomized controlled trials demonstrate 70–75% reduction in ulcer recurrence with Achilles lengthening versus standard care alone. Post-operative management includes a period of non-weight bearing followed by progressive rehabilitation restoring gastrocnemius-soleus length and strength. Dr. Biernacki at Balance Foot & Ankle performs gastrocnemius recession and Achilles lengthening as part of comprehensive foot reconstruction for patients with equinus-driven pathology throughout Michigan. Call (810) 206-1402.

More Podiatrist-Recommended Achilles Essentials

Achilles Night Splint

United Ortho dorsiflexion splint — reduces morning Achilles tendon stiffness.

Cushioned Running Shoe

Watch: Achilles Tendonitis & Back of Heel Pain [BEST Home Treatments 2024!] — MichiganFootDoctors YouTube

View on Amazon →

Hoka Clifton 10 — max-heel-cushion offloads the Achilles with every step.

Calf Foam Roller

TriggerPoint foam roller — releases calf tension that upstream-drives Achilles inflammation.

As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. Product recommendations are based on clinical experience; prices and availability shown above update live from Amazon.

When to See a Podiatrist

Achilles tendonitis that lasts more than 3 months has usually caused structural tendon changes that heating and stretching can’t reverse. Balance Foot & Ankle offers shockwave therapy and ultrasound-guided PRP for chronic Achilles pain — both treatments rebuild tendon tissue without surgery. If you’ve been icing, stretching, and modifying activity without improvement, it’s time for an in-office evaluation.

Call Balance Foot & Ankle: (810) 206-1402  ·  Book online  ·  Offices in Howell & Bloomfield Township

In-Office Treatment at Balance Foot & Ankle

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

Dr. Tom Biernacki, DPM

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.