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Achilles Tendon Pain: What Causes It, What Works, and What Doesn't

The Achilles tendon is the largest and strongest tendon in the body, connecting the calf muscles (gastrocnemius and soleus) to the heel bone (calcaneus). It transmits the force of calf contraction into the propulsive push-off of every step, run, and jump. In running, the Achilles tendon absorbs forces of 6 to 8 times body weight per stride.

When something goes wrong with the Achilles, it announces itself unmistakably — a stiffness and pain in the back of the heel and lower calf that is worst first thing in the morning, that eases with the first few minutes of activity, and then often worsens again with sustained load. In more severe cases, the tendon becomes visibly thickened. In the worst case — an acute rupture — a sudden snap and complete loss of push-off power signals a surgical emergency.

Achilles tendon problems in India are most common in the running community (Noida has a growing running culture), in cricket players (fast bowlers particularly), in gym athletes who have recently increased heavy calf loading, and in middle-aged adults who exercise intermittently with poor baseline conditioning.

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The Two Distinct Achilles Problems

Achilles Tendinopathy (The Chronic Overuse Condition)

Achilles tendinopathy is not inflammation in the traditional sense — despite its older name "Achilles tendinitis." Biopsy studies consistently show a degenerative pathology: disorganised collagen, increased blood vessel ingrowth, failed healing response. The same picture seen in plantar fasciitis and tennis elbow.

There are two anatomical subtypes:

Mid-portion tendinopathy (most common): Pain and thickening approximately 2 to 6 cm above the heel bone insertion. This is the area of lowest blood supply in the tendon and the highest load concentration. Mid-portion tendinopathy responds very well to progressive loading protocols.

Insertional tendinopathy: Pain directly at the tendon-bone junction at the heel. Less common, more problematic, responds less predictably to loading, and is more often associated with a Haglund deformity (a bony prominence on the back of the heel that creates additional mechanical irritation).

Acute Achilles Tendon Rupture

A complete rupture of the Achilles tendon is a different and more serious injury — an acute event, not a gradual overuse condition. Typically occurs in men aged 30 to 50 who exercise intermittently ("weekend warriors"), during a sudden acceleration or push-off (e.g., first sprint in a cricket match after weeks of inactivity).

The classic presentation: a sudden sharp pain in the back of the lower leg during activity, often described as feeling like being struck from behind, followed by inability to push off the foot normally. On examination, a gap in the tendon can often be felt, and the Thompson test (squeezing the calf with the patient lying prone) fails to produce foot plantarflexion when the tendon is ruptured.

Achilles tendon rupture requires urgent assessment — the treatment decision (surgical repair vs conservative casting) should be made within days of injury, not weeks.

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Diagnosing Tendinopathy: What Is Needed

Achilles tendinopathy is primarily a clinical diagnosis in most cases.

Clinical features:

• Gradual onset pain in the posterior heel and lower calf
• Morning stiffness and pain that eases with the first 5 to 10 minutes of walking ("warm-up phenomenon")
• Tenderness on squeezing the tendon at the site of symptoms
• Palpable nodular thickening in mid-portion tendinopathy

Ultrasound: Shows tendon thickening, hypoechoic areas (degenerated tissue), and neovascularisation. Useful to confirm diagnosis, assess severity, and guide injection treatment.

MRI: Provides more anatomical detail, particularly useful at the insertion, and can identify partial tears within the tendon substance.

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What Works: The Evidence-Based Treatment Hierarchy

The Eccentric Calf Raise Programme — The Gold Standard

For mid-portion Achilles tendinopathy, the Alfredson eccentric loading protocol has 25 years of evidence behind it and remains the most robustly proven non-surgical treatment. The principle: eccentric loading (the muscle lengthens under tension) stimulates collagen remodelling in the degenerated tendon.

The exercise:

On a step with the heel dropping below the step level:

1. Use both feet to rise onto tiptoe (concentric — not working the damaged tendon)
2. Transfer all weight to the affected leg
3. Slowly lower the heel below the step level under the affected leg's control alone (eccentric — this is where the tendon work happens), over 3 seconds
4. Repeat

Three sets of 15 repetitions, twice daily — morning and evening. Including both knee-straight (targets gastrocnemius) and knee-bent (targets soleus) variations.

The discomfort: These exercises produce the characteristic tendon pain during the movement. This is expected and appropriate at a 3 to 5 out of 10 level. The programme should not be stopped because of this pain — stopping is the mistake most patients make when attempting the protocol without guidance.

Timeframe: Improvement is gradual. Most patients see meaningful improvement at 6 to 12 weeks of consistent twice-daily practice. Full resolution of symptoms may take 3 to 6 months.

Heavy Slow Resistance (HSR) as an alternative: More recent evidence suggests heavy slow resistance loading (bilateral calf raises on a leg press machine with heavy load, slow tempo) may be equally effective with better compliance than the Alfredson protocol — the pain is lower during the exercise, making it easier to sustain.

Load Management

During the rehabilitation period, modifying — not eliminating — running and sport is appropriate. Reducing total weekly running mileage by 30 to 50 percent, avoiding hill running and speed sessions while maintaining some running volume, allows continued conditioning while reducing peak tendon load.

Complete rest worsens tendinopathy outcomes. The tendon requires progressive loading to stimulate the healing response.

Footwear and Surface

A 1 to 1.5 cm heel raise (inside the shoe) reduces the peak tendon stretch during the loading phase of walking and running, reducing symptoms during the loading programme. This is a simple, inexpensive adjunct.

Transitioning to more heel-to-toe drop running shoes (from minimalist flat shoes) if the patient has recently changed footwear as part of the tendinopathy onset is important.

PRP Injection — For Recalcitrant Tendinopathy

When 3 to 4 months of consistent loading programme and footwear modification has not produced adequate improvement, PRP injection under ultrasound guidance provides biological stimulation for tendon repair. The growth factors in PRP — PDGF, VEGF, IGF — support the collagen remodelling process that the loading programme initiates.

Evidence: Multiple RCTs show PRP produces better outcomes than placebo or dry needling for mid-portion Achilles tendinopathy at 6 to 12 months. It is not a substitute for the loading programme — it works best as an adjunct to it.

What does not work (and may worsen tendinopathy): Corticosteroid injection into the Achilles tendon. Multiple studies show steroid injection causes short-term pain reduction followed by accelerated collagen degradation, increased risk of tendon rupture, and worse long-term outcomes than sham injection. Corticosteroid injection into the Achilles tendon body is contraindicated.

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Insertional Achilles Tendinopathy: Different Management

The insertional type is more stubborn. The eccentric loading protocol that works for mid-portion tendinopathy involves heel drop below step level — which compresses the insertion against the heel bone and worsens symptoms. Modified protocols (eccentric loading on flat ground, not below step level) and HSR are more appropriate.

Shockwave therapy (ESWT) has stronger evidence for insertional tendinopathy than for mid-portion. Haglund deformity (prominent bony spur on the heel) may require surgical resection if it is a direct mechanical contributor.

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Achilles Tendon Rupture: The Surgical Decision

For confirmed complete Achilles tendon rupture, the evidence for surgical versus conservative management has evolved. Modern functional bracing (a specific boot protocol that begins progressive mobilisation early) produces outcomes equivalent to surgical repair in younger active patients, with lower complication rates.

However, for physically active patients under 50 who participate in sport and want the best possible chance of return to pre-injury activity level, surgical repair remains a reasonable choice — there is some evidence for lower re-rupture rates with surgery in this group.

For older patients or those with significant comorbidities, functional casting/bracing is typically preferred.

The decision should be made promptly — ideally within the first 2 weeks of injury, before tendon retraction and adhesion formation complicate either surgical or conservative management.

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Frequently Asked Questions

How long before I can run again after Achilles tendinopathy? Return to pain-free running typically takes 3 to 6 months of consistent loading programme for mid-portion tendinopathy. Return to full training with speed and hill work takes 6 to 12 months in many cases. Rushing this timeline is the most common cause of recurrence.

Can I continue playing cricket with Achilles tendinopathy? Modifying cricket — reducing bowling overs, batting carefully and not sprinting aggressively between wickets, replacing fielding sprint drills with lower-intensity fielding — allows many players to continue participating while the loading programme is underway. Complete cessation is rarely necessary or beneficial.

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Dr. Ankur Singh | Orthopedic Specialist Noida | Achilles Tendon Treatment India | Sports Injury Noida | Sarvodaya Healthcare Noida | Renew Orthopedic Clinic Sector 47 Noida