Phases of Achilles Tendinopathy: Symptoms and Treatment

Introduction: When Your Heel Pain Just Won't Go Away

You push off during your morning run, and there it is again: that dull, burning ache just above your heel. You rest for a few days, it settles, and then the moment you return to activity, it flares right back up. If this sounds familiar, you may be dealing with Achilles tendinopathy, one of the most common and often mismanaged overuse injuries among athletes and active individuals.

The problem is not just the pain. Most people do not know which phase of the injury they are in, leading to the wrong treatment at the wrong time. Some push through pain when they should be resting. Others rest too long when they should be doing specific exercises. Both mistakes slow recovery significantly.

This guide explains the phases of Achilles tendinopathy in clear, practical terms. It covers the symptoms you can expect at each stage, how doctors diagnose the condition, what treatment works best, and what a realistic recovery looks like. Whether you are a weekend runner, a cricket player, or someone who simply spends a lot of time on your feet, this article is written for you.

What Is Achilles Tendinopathy?

The Achilles tendon is the largest and strongest tendon in the human body. It connects your calf muscles (the gastrocnemius and soleus) to the heel bone (calcaneus) and is essential for walking, running, jumping, and climbing stairs. Every time you take a step, this tendon absorbs and transmits tremendous force.

Achilles tendinopathy is an umbrella term for pain, swelling, and impaired function caused by overuse or degenerative change within the tendon. It is not simply inflammation (as was once believed). Research over the past two decades has shown that the tendon actually undergoes structural changes at a cellular level, which is why anti-inflammatory medications alone rarely fix it.

The condition is most common in:

•       Distance runners and sprinters

•       Cricket players (especially fast bowlers)

•       Football and badminton players

•       Gym-goers who suddenly increase training intensity

•       Middle-aged adults aged 30 to 55, even those who are not particularly sporty

In the Indian context, with the explosive growth of recreational running, gym culture, and sports like cricket and kabaddi, Achilles tendinopathy has become increasingly prevalent. Unfortunately, many patients in India still attribute the pain to "simple heel pain" and delay seeking proper care for months, allowing the injury to progress to more advanced and harder-to-treat stages.

Insertional vs Non-Insertional Achilles Tendinopathy

Before discussing the phases, it helps to understand that Achilles tendinopathy occurs at two distinct anatomical locations. This distinction matters because the symptoms, treatment approach, and recovery timelines differ.

Non-insertional tendinopathy is more common overall, while insertional tendinopathy tends to be more stubborn and requires a more carefully modified rehabilitation programme.

The Three Phases of Achilles Tendinopathy

The most widely used and clinically accepted model for understanding Achilles tendinopathy was developed by researchers Cook and Purdam. It describes a continuum of tendon pathology across three phases. Importantly, the tendon can move forward and backward along this continuum depending on how it is managed.

Understanding which phase you are in is critical because what helps in Phase 1 can actually cause harm in Phase 3, and vice versa.

Phase 1: Reactive Tendinopathy

What is happening inside the tendon: The tendon is reacting to sudden overload with a short-term protective response. Cells within the tendon (tenocytes) produce extra proteins to thicken and stiffen the tendon, trying to protect it from further damage. There is no actual structural damage at this point. This phase is entirely reversible with the right management.

Symptoms in the Reactive Phase

•       Sudden onset of pain, often after a specific increase in training load

•       Pain that is worse at the start of activity and improves after a warm-up (the classic "morning stiffness" that loosens with movement)

•       Noticeable swelling or thickening of the tendon

•       Tenderness when you press directly on the tendon

•       Pain that settles within 24 hours of stopping activity

Common Triggers for Phase 1

•       Suddenly increasing weekly running mileage by more than 10 percent

•       Returning to sport after a long break without adequate preparation

•       Starting a new training programme too aggressively

•       Hard running surfaces, especially concrete or tarmac

•       Worn-out footwear with poor cushioning

Treatment for Reactive Tendinopathy

The key principle here is load management, not complete rest. Completely stopping all activity is rarely necessary and can actually delay recovery.

• Relative rest: Reduce or modify the aggravating activity. Do not stop moving altogether.

• Ice: Apply ice to the tendon for 10 to 15 minutes after activity to reduce pain and swelling.

• NSAIDs: Short-term anti-inflammatory medication (such as ibuprofen) can help in this early phase, unlike in later stages.

• Isometric exercises: Standing calf raises held for 30 to 45 seconds, repeated 5 times. These reduce pain and maintain tendon capacity without causing further damage.

• Footwear review: Switch to supportive running shoes or add a heel raise (1 to 1.5 cm) to reduce strain on the tendon.

• Avoid stretching: Counterintuitive but important. Aggressive stretching in this phase compresses the tendon and worsens symptoms.

Phase 2: Tendon Disrepair (Failed Healing Response)

What is happening inside the tendon: The reactive response has not been properly managed, or the overload has continued. The tendon is now attempting to repair itself but is failing to do so in an orderly way. Abnormal blood vessel ingrowth (neovascularisation) begins. The tendon matrix becomes disorganised. The structural integrity of the tendon is starting to change, though it remains intact.

Symptoms in the Disrepair Phase

•       Pain that is present at the start of activity AND persists during activity

•       A palpable nodule or thickened area within the tendon body

•       Pain that takes more than 24 hours to settle after activity

•       Stiffness that is more pronounced and takes longer to resolve

•       Reduced performance, especially in activities requiring explosive push-off

Why This Phase Is Tricky

Many athletes in this phase continue to train because the pain "warms up" and temporarily reduces during activity. They interpret this as improvement. It is not. The tendon is being repeatedly loaded in a compromised state, which risks pushing the injury into the irreversible Phase 3.

Treatment for the Disrepair Phase

• Eccentric exercise programme: This is the cornerstone of treatment for mid-portion tendinopathy in this phase. The Alfredson protocol (heel drops off a step, performed 3 sets of 15 repetitions, twice daily) has strong evidence behind it.

• Heavy slow resistance (HSR) training: An alternative to Alfredson's protocol that many patients find more comfortable and equally effective. Involves slow, controlled calf raises with added load.

• Shockwave therapy (ESWT): Extracorporeal shockwave therapy has good evidence for this phase. It stimulates tissue repair and reduces the painful nerve ingrowth that develops in disrepair-stage tendons.

• Load monitoring: Activity is not stopped, but weekly load is carefully managed and progressive, guided by a physiotherapist.

• Avoid cortisone injections: Steroid injections are not recommended for Achilles tendinopathy beyond the very early reactive phase. They can weaken tendon tissue and increase the risk of rupture.

Phase 3: Degenerative Tendinopathy

What is happening inside the tendon: At this stage, areas of the tendon have lost their organised collagen structure and are replaced with disorganised, degenerated tissue. These areas have poor cellular activity and are essentially unable to heal on their own. Calcific deposits may form. The tendon is at significantly higher risk of partial or complete rupture.

Symptoms in the Degenerative Phase

•       Persistent, chronic pain that has been present for 6 months or longer

•       A firm, irregular nodule or lump within the tendon that does not resolve

•       Pain that is now present even during low-level activities such as walking

•       Significant reduction in sport and daily function

•       The tendon may feel "different" with a change in its texture on palpation

Who Gets Degenerative Tendinopathy?

This phase is more common in people who have ignored symptoms for a prolonged period, those who received incorrect treatment (such as repeated steroid injections), older athletes with long-standing tendon issues, and those with certain systemic conditions like diabetes or high cholesterol, which are known to affect tendon health.

Treatment for Degenerative Tendinopathy

Conservative treatment remains the first line even here, though results are less predictable and the timeline is longer.

• Continued loading programme: Eccentric and HSR training, modified as needed based on symptom response.

• Shockwave therapy: Can still be helpful, particularly for calcific areas.

• PRP (Platelet-Rich Plasma) injections: Injecting growth factors derived from the patient's own blood into the tendon has shown promising results in degenerative tendinopathy. It is not a cure but can support tendon healing when other treatments have plateaued.

• Surgery: Reserved for patients who have failed 6 to 12 months of structured conservative care. Surgical options include percutaneous tenotomy, open debridement of degenerate tissue, or tendon transfer procedures in severe cases.

Quick Reference: Phases vs Symptoms vs Treatment

How Is Achilles Tendinopathy Diagnosed?

Diagnosis of Achilles tendinopathy is primarily clinical. A skilled sports orthopedic specialist can usually identify the condition and its phase through a combination of your history, a physical examination, and targeted tests.

Clinical Assessment

• Royal London Hospital Test: The examiner palpates the tendon and then dorsiflexes the ankle. If pain reduces or disappears with dorsiflexion, this is a positive test and confirms mid-portion tendinopathy.

• VISA-A Score: A validated questionnaire that assesses severity and monitors recovery over time. Scores range from 0 (severe) to 100 (normal). Most sports physicians use this as a standard outcome measure.

• Arc Sign: A swelling that moves with the tendon during ankle movement, rather than staying fixed, suggests intratendinous pathology.

Imaging

• Ultrasound (USG): The most cost-effective and widely available imaging tool for Achilles tendinopathy in India. It shows tendon thickening, loss of fibrillar pattern, and neovascularisation in real time. It is also used to guide injections accurately.

• MRI: Provides more detailed structural information and is useful when the diagnosis is uncertain or when surgery is being considered. It is better than ultrasound for assessing insertional involvement and bone changes.

• X-ray: Limited value for the tendon itself, but useful to identify calcification or a Haglund deformity (a bony prominence on the heel that can aggravate the tendon at its insertion).

Important: Imaging findings do not always correlate with symptoms. An MRI can show degeneration in a tendon that causes no pain, while a patient with significant pain may have only mild changes on scan. Clinical assessment always takes precedence over imaging alone.

Red Flag Symptoms: When to Seek Immediate Medical Attention

•       Sudden, severe pain: Described by many as feeling like being struck by a bat or stone on the back of the leg

•       Immediate loss of power: Sudden inability to push off or rise on tiptoe

•       Visible gap or deformity: A palpable hollow or depression in the tendon

•       Significant swelling and bruising: Rapid onset after a traumatic episode

•       Inability to bear weight: Difficulty walking after injury

These symptoms require prompt evaluation by a sports orthopedic specialist. An Achilles rupture is a surgical emergency in many cases and is entirely different from tendinopathy in its management.

 

Rehabilitation and Recovery: What You Actually Need to Do

The Alfredson Eccentric Protocol (Most Studied Exercise for Mid-Portion Tendinopathy)

This programme was developed by Dr Hakan Alfredson after he purposely aggravated his own tendon to secure surgical approval, then rehabilitated it with this protocol. It involves:

•       Standing on the edge of a step on the balls of both feet

•       Rising on tiptoe using both feet (concentric phase)

•       Lowering slowly on the injured leg only (eccentric phase)

•       Performing 3 sets of 15 repetitions, twice daily, 7 days a week

•       Continuing even if pain is present during the exercise (this is the key distinction from standard exercise advice)

•       Progressing to adding load (backpack with books, weighted vest) when bodyweight is pain-free

Note: This protocol is NOT appropriate for insertional tendinopathy. For the insertional variant, exercises are performed on flat ground to avoid the compressive force that a step creates.

Heavy Slow Resistance (HSR) Training: The Emerging Alternative

More recent research has shown that heavy slow resistance training, performed 3 days a week using calf raise machines or leg press, achieves comparable or superior results to the Alfredson protocol in some patients. It is also better tolerated by those who find twice-daily eccentric loading excessively painful.

Sample Weekly Progression Framework

Role of Physiotherapy

Physiotherapy is the backbone of Achilles tendinopathy rehabilitation. A physiotherapist will design a programme specific to your phase, activity level, and goals. They will monitor your response, adjust load progressions, use adjuncts such as taping and manual therapy, and guide your return to sport.

In India, quality physiotherapy for sports injuries is increasingly accessible in major cities. Costs for a course of physiotherapy typically range from approximately Rs. 1,500 to Rs. 3,000 per session in private sports clinics, with some multi-session packages available.

Treatment Costs in India: What to Expect

One of the most common concerns for patients seeking care for Achilles tendinopathy in India is the cost of treatment. Here is a realistic overview of the approximate costs you might encounter:

Most insurance plans in India cover investigations and surgical procedures for Achilles tendinopathy when adequately documented. Conservative physiotherapy is often not covered. We recommend checking with your insurer before starting treatment.

When Is Surgery Needed for Achilles Tendinopathy?

Surgery is not the first answer for Achilles tendinopathy. The vast majority of patients (approximately 70 to 80 percent) recover fully with structured conservative care. Surgery becomes a consideration only when:

• Symptoms have persisted for 6 months or more despite a properly supervised rehabilitation programme

• Imaging shows significant structural degeneration that is not responding to conservative measures

• The patient's quality of life and functional capacity are severely affected

• A co-existing condition such as a Haglund deformity is contributing to symptoms and requires correction

Surgical Options

• Percutaneous longitudinal tenotomy: A minimally invasive procedure where multiple small cuts are made in the tendon under ultrasound guidance to stimulate healing. Recovery is faster than open surgery.

• Open debridement: The degenerated tissue within the tendon is surgically removed and the healthy tendon repaired. Used for more extensive degenerative changes.

• Haglund's deformity excision: For insertional tendinopathy complicated by a bony heel spur, the spur is removed to reduce mechanical irritation.

• Tendon transfer: In severe cases with significant tendon loss, the flexor hallucis longus (FHL) tendon is transferred to augment the Achilles. This is reserved for complex, refractory cases.

Post-surgical rehabilitation follows a structured programme similar in structure to conservative rehab but with an initial protected weight-bearing phase. Return to sport typically takes 6 to 12 months after surgery.

Sports and Achilles Tendinopathy in the Indian Context

India's sporting culture is evolving rapidly. Cricket remains the dominant sport, but recreational running, football, badminton, and gym-based fitness training have all surged in popularity over the past decade. With this growth comes a corresponding rise in overuse injuries, of which Achilles tendinopathy is among the most common.

Cricket: Fast bowlers are particularly vulnerable due to the explosive, repetitive push-off involved in the bowling action. The combination of long bowling spells, hard surfaces, and inadequate recovery between matches creates the perfect environment for tendon overload.

Running: The running community in Indian cities like Bengaluru, Mumbai, Pune, and Delhi has grown enormously, with 10K and half-marathon events drawing tens of thousands of participants. Many recreational runners lack the gradual training build-up needed to protect their tendons.

Gym training: Sudden initiation of heavy calf-loading exercises, box jumps, and treadmill running without adequate preparation is increasingly seen as a trigger in gym-going populations aged 28 to 45.

If you are searching online using terms like qwerty while looking for quick pain relief or exercises for heel tendon pain, it is understandable. However, what ultimately matters is identifying your phase of tendinopathy correctly, because the right exercise at the wrong phase can set you back significantly. This is why a structured consultation with a qualified sports orthopedic specialist is always worth investing in.

Prevention Strategies for Athletes and Active Individuals

Achilles tendinopathy is largely preventable with sensible training habits. Here are evidence-based strategies to protect your tendon long-term:

Training Load Management

•       Follow the 10 percent rule: do not increase your weekly training volume by more than 10 percent per week

•       Include at least one full rest day per week

•       Avoid sudden changes in training surface (e.g., switching from grass to concrete without adjustment)

•       Incorporate periodisation into your annual training plan to allow for adequate recovery

Footwear and Equipment

•       Invest in sport-specific footwear appropriate for your activity and foot type

•       Replace running shoes every 600 to 800 kilometres

•       Consider a professional gait analysis if you are a regular runner, particularly if you have had tendon issues before

Strength and Conditioning

•       Include regular calf strengthening in your routine even when pain-free

•       Maintain overall lower limb strength through squats, lunges, and single-leg exercises

•       Prioritise flexibility of the calf complex and hip flexors to reduce compensatory loading on the Achilles

Recovery

•       Prioritise sleep (7 to 9 hours) and adequate protein intake for tendon health

•       Address any systemic conditions such as diabetes or elevated cholesterol, which are independently associated with tendon degeneration

•       Act early if you notice the first signs of tendon pain. A problem caught in Phase 1 takes weeks to resolve. The same problem left until Phase 3 can take 12 to 18 months.

When Should You Consult a Sports Orthopedic Specialist?

Not every case of Achilles pain needs immediate specialist care. However, you should book a consultation if:

•       Pain has persisted for more than 4 weeks despite rest and basic self-management

•       Pain is affecting your ability to walk or perform daily activities

•       You have experienced a sudden increase in pain after a specific activity

•       You notice a visible lump or swelling on the tendon

•       You have tried physiotherapy previously without success

•       You are preparing for a sporting event and need expert guidance on whether it is safe to continue training

At Sports Orthopedics Institute, our specialists are experienced in the assessment and management of Achilles tendinopathy across all phases. We combine accurate clinical diagnosis with evidence-based treatment protocols, tailored to your specific injury stage and return-to-sport goals.

Frequently Asked Questions

1. How long does Achilles tendinopathy take to heal?

This depends heavily on the phase. Reactive tendinopathy (Phase 1) can resolve in 6 to 12 weeks with proper management. Disrepair-stage tendinopathy (Phase 2) typically requires 3 to 6 months of structured rehabilitation. Degenerative tendinopathy (Phase 3) can take 6 to 18 months, and a small subset of patients ultimately require surgery. The sooner treatment starts and the more consistently rehabilitation is followed, the faster the recovery.

2. Can I continue running with Achilles tendinopathy?

In Phase 1, a significant reduction in running load is necessary, but complete cessation is usually not required. In Phase 2, running can often continue at a reduced volume if pain during activity stays below 3 to 4 out of 10 and settles within 24 hours. In Phase 3, running may need to be temporarily stopped and replaced with lower-impact cross-training such as swimming or cycling. Your physiotherapist or orthopedic specialist will guide this decision based on your individual response.

3. What is the best exercise for Achilles tendinopathy?

For mid-portion (non-insertional) tendinopathy in the disrepair or degenerative phase, eccentric heel drops (the Alfredson protocol) performed on a step have the strongest evidence base. Heavy slow resistance training using a calf raise machine 3 times per week is an alternative with comparable results. In the reactive phase, isometric calf holds are safer and equally effective. Stretching is generally not recommended and can worsen symptoms.

4. Should I get a steroid injection for Achilles tendinopathy?

Corticosteroid (steroid) injections are not recommended for Achilles tendinopathy in most clinical guidelines. While they may provide short-term pain relief in the early reactive phase, they can weaken collagen within the tendon, increasing the risk of rupture. PRP (Platelet-Rich Plasma) injections have better evidence for tendon conditions and are a safer alternative. Discuss this with your specialist before proceeding.

5. Is Achilles tendinopathy the same as a tendon tear?

No. Achilles tendinopathy refers to a degenerative or reactive process within the tendon, where the tendon remains structurally intact. An Achilles tendon tear (rupture) involves an actual break in the tendon fibers, is usually caused by a sudden, explosive force, and presents with dramatic symptoms, including the feeling of being struck, immediate loss of power, and inability to walk normally. Treatment is very different, and ruptures often require surgery. You can learn more about Achilles Tendon Tear at sportsorthopedics.in/bone-joint-school/achilles-tendon-tear

6. Will I need surgery?

Most patients with Achilles tendinopathy do not need surgery. Approximately 70 to 80 percent of patients achieve good outcomes with a properly supervised conservative programme of exercises, load management, and adjunct therapies such as shockwave therapy or PRP. Surgery is considered only when symptoms persist beyond 6 to 12 months of structured conservative care and quality of life is significantly impaired.

7. Does Achilles tendinopathy ever fully heal?

Yes, the majority of patients achieve full functional recovery and return to their desired level of activity. However, complete structural normalisation of the tendon on imaging is not always achieved, and this is acceptable. Symptoms and function are far more important indicators of recovery than scan appearances. The tendon can function excellently even with some residual structural changes, provided rehabilitation has been correctly completed.

8. How much does Achilles tendinopathy treatment cost in India?

A typical course of treatment for Achilles tendinopathy in India involves specialist consultation (Rs. 800 to Rs. 2,000), imaging such as ultrasound or MRI (Rs. 500 to Rs. 10,000), and physiotherapy sessions over several months. If shockwave therapy or PRP is required, costs will be higher. A full conservative course of treatment typically ranges from approximately Rs. 20,000 to Rs. 60,000 across 3 to 6 months, depending on the phase and the facility.

Related Resources from Sports Orthopedics Institute

For further reading and patient education resources from our clinical team, please explore the following:

•       Achilles Tendon Tear: Causes, Symptoms and Treatment

•       Ankle Pain: Overview of Conditions and When to Seek Care

•       Bone and Joint School: Patient Education Library

•       Meet Our Specialists

•       Book an Appointment with Our Sports Orthopedic Team

Ready to Take the Next Step?

Do not let Achilles tendinopathy sideline you longer than necessary. A precise diagnosis and a phase-appropriate treatment plan makes all the difference. Our specialists at Sports Orthopedics Institute are here to help you understand your condition and get back to full activity safely.

Book a Consultation at sportsorthopedics.in

Phone: +91 6364538660  |  +91 9008520831

HSR Layout, Bengaluru - 560102

Medical Disclaimer

This article is intended for patient education and general information only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for your specific condition.