CONDITION

Achilles Tendinopathy

Achilles tendinopathy is irritation and structural change in the Achilles tendon, the cord connecting your calf muscles to your heel bone. It usually develops gradually from overuse rather than a single injury, and it is common in active people, from occasional exercisers to competitive athletes.

Dr. Tristan Ginkel
Written by Dr. Tristan Ginkel, DC, FRCms
Sports Chiropractor
5 min read

What Is Achilles Tendinopathy?

The Achilles tendon is the strong, fibrous cord that connects your calf muscles to your heel bone. It plays a central role in walking, running, and jumping, which makes it vulnerable to strain under repetitive stress or poor mechanics. In tendinopathy, the tendon becomes irritated and undergoes structural changes from overuse or injury. Unlike a sudden tear, it typically develops gradually, often linked to tight calf muscles, poor footwear, or a rapid increase in activity.

Achilles tendinopathy is usually classified as midportion or insertional, depending on where the pain is located, and treatment can differ slightly between the two. Imaging is not always necessary, but ultrasound or MRI may be used to confirm the diagnosis or rule out a partial tear in severe or non-responsive cases.

What Does It Feel Like?

Symptoms vary with severity. Common ones include:

  • Stiffness, especially in the morning or after periods of rest.
  • Pain, a dull ache or sharp pain along the back of the heel or lower calf, often worse with activity.
  • Tenderness to touch or pressure.
  • Swelling, mild and sometimes with a small lump along the tendon in chronic cases.

Pain often starts subtly and progresses if left unaddressed, so early intervention is important.

Can You Run or Exercise With It?

Whether you can keep running or exercising depends on the severity of your condition and your pain levels. In mild cases, low-impact activities like swimming or cycling may be tolerable, but running and high-impact exercise often aggravate the tendon. Pushing through significant pain can delay healing and raise the risk of a full tendon rupture, which is a far more serious injury. Rest does not mean complete inactivity; the goal is the right balance of load to promote recovery. A sports chiropractor or physical therapist can assess your condition and build a safe plan.

How Long Does It Take to Heal?

Healing time varies with the extent of tendon damage, how closely you follow treatment, and your activity level. Mild cases often resolve within 6 to 12 weeks of care, while moderate to severe cases can take 3 to 6 months, especially once degeneration has set in. Tendons heal slowly because they have a limited blood supply, but consistent treatment can speed recovery and reduce the chance of recurrence. Patience and commitment to rehabilitation are essential.

The Stages of Achilles Tendinopathy

Achilles tendinopathy tends to progress through three stages:

  • Early (reactive). The tendon becomes irritated and swollen from doing too much too soon. If you ease off the load, it can settle quickly.
  • Middle (dysrepair). If the irritation continues, the tendon structure starts to change. It is still treatable, but it takes more time and care.
  • Chronic (degenerative). Over time, parts of the tendon can weaken and break down. Recovery is still possible, but it takes a more structured plan and more patience.

How Do You Treat It?

At Radius, we take a comprehensive approach that combines evidence-based techniques to reduce pain, restore function, and prevent future problems. Common treatments include:

  • Load management and progressive overload. Recovery centers on reloading the tendon in a controlled, graded way rather than avoiding activity altogether, so the tendon adapts and becomes more resilient over time.
  • Manual therapy. Hands-on techniques to improve calf flexibility and reduce tension around the tendon.
  • Shockwave therapy. A non-invasive treatment that uses high-energy sound waves to stimulate healing, reduce pain, and break down calcifications or adhesions in the tendon. It is particularly useful for chronic cases that have not responded to other methods.
  • Activity modification. Guidance on scaling back aggravating activities while keeping you as active as possible.
  • Isometric and eccentric exercise. In the early phases, isometric calf holds can reduce pain and provide a gateway to more dynamic loading. Controlled heel drops are one example of the eccentric loading we may add to rebuild tendon resilience.
  • Stretching and mobility work. Addressing tight calf muscles or limited ankle mobility when they contribute to the problem. Stretching can help, but it should be tailored to your specific presentation and pain levels.
  • Footwear and orthotics. Recommendations to support proper alignment and reduce strain on the tendon.

In severe cases we may coordinate with your physician to explore additional options, though invasive options are rarely needed. The goal is to return you to your routine with a stronger, healthier tendon.

Take the Next Step

Achilles tendinopathy can be frustrating, but it does not have to sideline you. Our team of sports chiropractors and rehabilitation providers builds a personalized plan around your symptoms and goals. Whether you are considering shockwave therapy or just need help getting started, contact us to schedule an evaluation.

Dr. Tristan Ginkel
About the author
Dr. Tristan Ginkel, DC, FRCms
Sports Chiropractor

Dr. Tristan Ginkel is a passionate and skilled sports chiropractor and Functional Range Conditioning mobility specialist based in Nevada City, California, dedicated to helping patients move better, feel stronger, and perform at their best. Originally from Gilroy, CA, Dr. Tristan brings a warm, personable approach to care—blending cutting-edge techniques with a sincere commitment to each patient’s health journey. Known for his kindness, approachability, and family-first values, he strives to create a supportive and empowering experience for every individual he treats.

More from Dr. Tristan Ginkel →

Frequently Asked Questions

Common questions about Achilles tendinopathy.

What is Achilles tendinopathy?

Achilles tendinopathy is irritation and structural change in the Achilles tendon, the strongest and largest tendon in the body, which connects the calf muscles to the heel bone. It is usually classified by where it occurs: insertional tendinopathy affects the tendon's attachment to the back of the heel bone (calcaneus), while non-insertional (midportion) tendinopathy occurs in the mid to proximal third of the tendon, about 2 to 6 cm above the insertion.

What does Achilles tendinopathy feel like?

Achilles tendinopathy is characterized by pain, stiffness, and tenderness along the Achilles tendon. People often notice tenderness when the heel or tendon is pressed, along with pain and stiffness while walking, especially during the first few steps, that gets worse with prolonged activity. Calf tightness and swelling at the back of the ankle are also common. With insertional cases, pain is felt in the lower third of the tendon and morning stiffness may occur.

What causes Achilles tendinopathy, and who is at risk?

Achilles tendinopathy is linked to several factors, including calf muscle tightness or weakness, gluteal (buttocks) muscle weakness, limited ankle motion, abnormal foot mechanics, improper footwear, and changes in exercise or activity level. Mechanical overload and older age raise risk, and some medications, including corticosteroids and fluoroquinolone antibiotics, are associated with tendon problems. More than 40% of elite track-and-field athletes may experience symptoms, but about 65% of cases are not sports-related.

How long does Achilles tendinopathy take to heal?

Recovery time varies, and full recovery can take a year or longer. Structured rehabilitation is often described in phases, moving from early symptom management and load reduction over the first weeks, through recovery and rebuilding phases, to a return-to-sport phase that may span 3 to 6 months or longer. The earlier the injury is detected, the shorter the expected time for full recovery. Progressive tendon loading remains the cornerstone of treatment throughout.

When can I return to running or sport after Achilles tendinopathy?

Return to running and jumping is generally guided by criteria rather than a fixed date. Before returning, pain during daily walking should be minimal (about 1 to 2 out of 10). Full recovery of function, measured with heel-rise and jumping tests, along with symptomatic recovery, is important before progressing. Activities are generally reclassified every 3 to 4 weeks as tolerance improves. Monitoring symptoms, stiffness, pain, and swelling after training, especially the following day, is crucial before increasing training.

How is Achilles tendinopathy treated?

Progressive tendon loading remains the cornerstone of Achilles tendinopathy treatment, with exercise rehabilitation having the highest level of evidence; the purpose of exercise is to load the tendon to promote remodeling, decrease pain, and improve calf-muscle endurance and strength. Any type of muscle contraction can be used to load the tendon, and the choice should be progressive and based on the patient's response. Moderate-level evidence favors eccentric exercise over concentric exercise. Other options include activity modification, footwear or orthoses, and extracorporeal shockwave therapy (ESWT).

Sources

The information on this website is general education about musculoskeletal and movement-related conditions. It is not medical advice or a diagnosis, and it cannot tell you what is causing your symptoms. Reading it is not a substitute for an in-person evaluation, and booking a visit does not confirm that your condition is right for our care until a provider has examined you. This information cannot identify every condition, and some urgent problems can feel like musculoskeletal pain. If your symptoms are severe or getting worse, or you are unsure how urgent they are, contact your physician, call 911, or go to the nearest emergency room. When in doubt, seek emergency care.

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