Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
Quick Answer
Insertional vs. Non-Insertional Achilles Tendinopathy: Why t relates to Achilles tendonitis — typically caused by sudden activity increase. Most patients improve in 8-12 weeks with conservative care. Same-week appointments in Howell + Bloomfield Twp: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.
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Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.
Achilles tendinopathy is the umbrella term for a spectrum of tendon pain, dysfunction, and degeneration affecting the Achilles tendon — but the treatment approach differs substantially depending on precisely where along the tendon the pathology occurs. Conflating insertional and non-insertional tendinopathy leads to applying the wrong treatment to the wrong location, which is the most common reason patients fail to improve despite months of stretching and physical therapy.
Anatomy: Two Distinct Zones of Pathology
The Achilles tendon runs from the gastrocnemius and soleus muscles of the calf to its insertion on the posterior calcaneus (heel bone). Tendinopathy affects two anatomically and mechanically distinct zones:
- Non-insertional (mid-portion) tendinopathy: Affects the middle third of the tendon, approximately 2–6 cm above the heel bone insertion. This zone has the poorest blood supply (the “watershed zone”) and is the most common location for degenerative tendinopathy. Pain and fusiform swelling are located in the mid-tendon.
- Insertional tendinopathy: Affects the distal 2 cm of the tendon at its calcaneal attachment. Often associated with a Haglund’s deformity (prominent superior calcaneal spur) and retrocalcaneal bursitis. Pain is at the very back of the heel, at the top of the heel bone.
Non-Insertional Tendinopathy
Mid-portion Achilles tendinopathy is primarily a degenerative process — collagen disorganization, failed healing, and neovascularization — rather than acute inflammation (the “-itis” of tendinitis is a misnomer in chronic cases). The gold-standard treatment is the Alfredson eccentric calf-loading protocol: a progressive eccentric heel-drop exercise program performed 3 sets × 15 repetitions twice daily for 12 weeks. Eccentric loading stimulates tendon remodeling and collagen synthesis through mechanical signaling.
The key technical point: the Alfredson protocol must be performed over a step, with the heel dropping below the level of the forefoot, and performed despite mild-to-moderate pain during exercise (pain is the stimulus for remodeling). Exercises that do not load the tendon eccentrically or are stopped at the first sign of discomfort produce inferior results.
For non-responders after 12 weeks of eccentric loading, Dr. Biernacki offers:
- Ultrasound-guided PRP injection — growth factor delivery to stimulate biological healing at the degenerative zone
- High-volume injection (saline + corticosteroid) — disrupts neovascularization that accompanies and may perpetuate tendinopathy
- Extracorporeal shockwave therapy (ESWT) — evidence supports both non-insertional and insertional tendinopathy
Insertional Tendinopathy
Insertional tendinopathy requires a fundamentally different approach because:
- The Alfredson eccentric protocol (heel drops below step level) compresses the Haglund’s prominence against the retrocalcaneal bursa and worsens insertional pathology — it is contraindicated for insertional tendinopathy
- Heel lifts (7–12 mm) reduce the plantarflexion range that compresses the superior calcaneus against the tendon insertion — these are the first-line orthotic intervention
- Eccentric loading for insertional tendinopathy is performed on a flat surface (not below neutral) to avoid compression
ESWT has particularly strong evidence for insertional Achilles tendinopathy. Cortisone injection directly into the retrocalcaneal bursa (under ultrasound guidance, NOT into the tendon) reduces bursitis component. Surgical debridement and Haglund resection is reserved for cases failing comprehensive conservative management.
Getting the Right Diagnosis
Diagnostic ultrasound at Balance Foot & Ankle visualizes the Achilles tendon in real time — identifying the location and extent of tendinosis, presence of intrasubstance tearing, retrocalcaneal bursa enlargement, and Haglund prominence — ensuring the treatment protocol is matched to the confirmed pathology site.
Persistent Achilles Pain? Get the Right Treatment for Your Specific Pathology.
Dr. Biernacki provides ultrasound-guided Achilles tendon evaluation and treatment at Balance Foot & Ankle — Bloomfield Hills and Howell, MI.
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Most Achilles tendonitis patients we see at Balance Foot & Ankle are recreational runners in their 40s or 50s who ramped up mileage too quickly, plus a second cohort of middle-aged women who recently switched from heels to flat shoes. The first question we ask is whether the pain is at the insertion on the heel bone versus 2–6 cm up the mid-substance — the treatment ladder is genuinely different. Eccentric heel-drops, heel lifts, and a soft-strike gait retraining pass resolve ~80 % of cases. The ones who aren’t improving by week 8 usually have an unrecognized Haglund’s deformity or insertional calcific tendinosis that needs imaging.
More Podiatrist-Recommended Achilles Essentials
Achilles Night Splint
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Hoka Clifton 10 — max-heel-cushion offloads the Achilles with every step.
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TriggerPoint foam roller — releases calf tension that upstream-drives Achilles inflammation.
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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 Hills
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Podiatrist-recommended products
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Heel lift for insertional Achilles tendinopathy.
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When conservative care isn’t enough, Dr. Tom Biernacki and the team at Balance Foot & Ankle offer advanced, same-day options — including Achilles Tendinopathy Treatment in Michigan at our Howell and Bloomfield Hills clinics.
Same-day appointments available. Call (810) 206-1402 or book online.
Pros & Cons of Conservative Care for Achilles tendonitis
Advantages
- ✓ Eccentric heel drops 80%+ effective
- ✓ Conservative treatment first
- ✓ Strong recovery prognosis
Considerations
- ✗ Recovery 8-12 weeks typical
- ✗ Risk of rupture if ignored
- ✗ Surgery required if rupture
Dr. Tom’s Recommended Products for Achilles tendonitis
Affiliate disclosure: As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. We only recommend products we use with patients.
TriggerPoint Footballer Dr. Tom’s Pick
Best for: Calf release + plantar release
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About Your Care Team at Balance Foot & Ankle
Dr. Tom Biernacki, DPM · Board-Certified Foot & Ankle Surgeon. Specializes in conservative-first care, minimally invasive bunion surgery, and complex reconstruction.
Dr. Carl Jay, DPM · Accepting new patients. Specializes in sports medicine, athletic injuries, and routine podiatric care.
Dr. Daria Gutkin, DPM, AACFAS · Accepting new patients. Specializes in surgical reconstruction and pediatric podiatry.
Locations: 4330 E Grand River Ave, Howell, MI 48843 · 43494 Woodward Ave Suite 208, Bloomfield Twp, MI 48302
Hours: Mon–Fri 8:00 AM – 5:00 PM · (810) 206-1402
Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon 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 reached over one million views.
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)
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