Evidence

Achilles Tendinopathy

ankle

Also known as: Achilles pain, Achilles tendinitis, Achilles tendonitis, heel cord pain, sore Achilles, Achilles injury

Last reviewed: 2026-03-07

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Interventions

92
A

Eccentric calf loading exercises (Alfredson protocol)

12 RCTs

Slowly lowering your heel off a step (eccentric loading) is the most evidence-supported exercise for Achilles tendinopathy. The classic Alfredson protocol involves 3 sets of 15 repetitions, twice daily, for 12 weeks. Multiple high-quality trials show significant pain reduction and improved function compared to wait-and-see or concentric exercises.

Evidence does not support: Eccentric loading alone does not resolve all cases. Approximately 40% of patients may not respond fully to eccentric-only protocols and may need additional interventions. Complete rest is not supported — tendons need progressive loading to heal.

Contraindications:
  • Acute Achilles tendon rupture (complete tear)
  • Severe pain during exercise (>5/10 pain scale)
90
A

Heavy slow resistance training (HSR)

6 RCTs

Heavy slow resistance training using machines (leg press, calf raise) with progressively increasing load over 12 weeks shows comparable outcomes to eccentric loading. Patients often report higher satisfaction with HSR due to the gym-based format and fewer daily sessions required (3x/week vs twice daily for eccentrics).

Evidence does not support: HSR has not been shown to be significantly superior to eccentric loading. The choice between them can be based on patient preference and access to equipment.

Contraindications:
  • Acute Achilles tendon rupture
  • Inability to perform loaded calf raises without significant compensation
88
A

Load management and activity modification

4 RCTs

Modifying training load is a cornerstone of tendinopathy management. This involves reducing high-intensity activities (hill running, speed work, plyometrics) while maintaining pain-free aerobic activity. The goal is to find the tendon's load tolerance and progressively increase it. Complete rest is counterproductive — tendons need loading to remodel.

Evidence does not support: Complete rest is NOT recommended. Tendons decondition with rest, making them more vulnerable on return to activity. Similarly, pushing through significant pain (>3-4/10) during exercise is not supported.

Contraindications:
  • Suspected complete rupture (requires immobilisation or surgical consultation)
72
B

Isometric calf holds for acute pain management

3 RCTs

Holding a calf raise position (isometric contraction) for 30-45 seconds can provide short-term pain relief during the acute/reactive phase of tendinopathy. This can be used as a bridge to heavier loading programmes. Typically performed as 5 reps of 45-second holds at 70% maximum voluntary contraction.

Evidence does not support: Isometric loading alone is insufficient for long-term tendon rehabilitation. It should be used for pain modulation, not as a standalone treatment.

Contraindications:
  • Complete tendon rupture
65
B

Shockwave therapy (ESWT)

5 RCTs

Extracorporeal shockwave therapy may provide additional benefit when combined with exercise-based rehabilitation, particularly for tendinopathy that has not responded to 3+ months of loading programmes. Evidence is moderate — it should not replace exercise-based treatment.

Evidence does not support: Shockwave therapy as a standalone treatment (without exercise) is not well-supported. It should be used as an adjunct to loading programmes, not a replacement.

Contraindications:
  • Pregnancy
  • Coagulation disorders
  • Local infection
25
D

Corticosteroid injection

4 RCTs

Corticosteroid injections may provide short-term pain relief but are associated with increased risk of tendon rupture and worse long-term outcomes. Current clinical practice guidelines recommend AGAINST routine use of corticosteroid injections for Achilles tendinopathy.

Evidence does not support: Evidence does NOT support corticosteroid injections for Achilles tendinopathy. They are associated with tendon weakening, fat pad atrophy, and increased rupture risk. The JOSPT 2024 CPG explicitly recommends against their use.

Contraindications:
  • Multiple previous injections at the same site
  • Known tendon thinning or partial tear

Red Flags

Sudden sharp pain with an audible pop during activity

Action: Seek immediate medical attention — possible Achilles tendon rupture. Do not bear weight. Apply ice and immobilise.

Inability to perform a single-leg calf raise

Action: See a clinician within 48 hours — may indicate significant tendon pathology or rupture.

Visible deformity or palpable gap in the tendon

Action: Seek immediate medical attention — likely complete tendon rupture requiring surgical consultation.

Severe swelling, redness, and warmth around the ankle

Action: See a clinician urgently — may indicate infection, DVT, or inflammatory arthropathy rather than tendinopathy.

Symptoms worsening despite 6+ weeks of appropriate loading programme

Action: Seek specialist physiotherapy or sports medicine review for reassessment and advanced imaging.

Differential Diagnoses

  • Achilles tendon rupture (partial or complete)
  • Retrocalcaneal bursitis
  • Insertional Achilles tendinopathy (distinct from midportion)
  • Posterior ankle impingement
  • Sever's disease (in adolescents)
  • Accessory soleus muscle
  • Plantaris tendon involvement

Frequently asked questions

What is the best evidence-based treatment for Achilles Tendinopathy?

The highest-rated treatment for Achilles Tendinopathy based on peer-reviewed research is Eccentric calf loading exercises (Alfredson protocol) (Trust Score: 92/100). Slowly lowering your heel off a step (eccentric loading) is the most evidence-supported exercise for Achilles tendinopathy. The classic Alfredson protocol involves 3 sets of 15 repetitions, twice daily, for 12 weeks. Multiple high-quality trials show significant pain reduction and improved function compared to wait-and-see or concentric exercises.

How many treatments are there for Achilles Tendinopathy?

There are 6 evidence-based interventions for Achilles Tendinopathy, ranked by Trust Score from peer-reviewed research including RCTs and systematic reviews. The top treatments are: Eccentric calf loading exercises (Alfredson protocol), Heavy slow resistance training (HSR), Load management and activity modification.

When should I see a doctor for Achilles Tendinopathy?

Seek medical attention immediately if you experience any of the following red flags: Sudden sharp pain with an audible pop during activity; Inability to perform a single-leg calf raise; Visible deformity or palpable gap in the tendon; Severe swelling, redness, and warmth around the ankle; Symptoms worsening despite 6+ weeks of appropriate loading programme.

What conditions are similar to Achilles Tendinopathy?

Conditions that may present similarly to Achilles Tendinopathy include: Achilles tendon rupture (partial or complete), Retrocalcaneal bursitis, Insertional Achilles tendinopathy (distinct from midportion), Posterior ankle impingement, Sever's disease (in adolescents), Accessory soleus muscle, Plantaris tendon involvement. A healthcare professional can help differentiate between these.