Achilles Tendon Injuries: Tendinopathy, Rupture, and Rehabilitation

The Achilles tendon plays an important role in walking, running, climbing stairs, jumping, and rising onto your toes. When it becomes painful or torn, even routine movement can become difficult. 

Two common Achilles tendon conditions are tendinopathy and rupture. Although both affect the same tendon, they have different symptoms, treatment options, and rehabilitation needs. 

Physical therapy can help people manage Achilles tendinopathy, return to activity after a partial injury, and recover following surgical or nonsurgical treatment of an Achilles tendon rupture. 

What Is the Achilles Tendon?

The Achilles tendon is a strong band of tissue located at the back of the lower leg. It connects the calf muscles to the heel bone. 

When the calf muscles contract, the Achilles tendon helps point the foot downward and lift the heel from the ground. This movement is essential for: 

  • Walking 
  • Running 
  • Climbing stairs 
  • Jumping 
  • Standing on your toes 
  • Pushing off the ground 

The Achilles is the largest tendon in the body and can tolerate substantial force. However, changes in activity or sudden high loads can exceed the tendon’s current capacity and contribute to injury. 

What Are the Main Types of Achilles Tendon Injuries?

Achilles tendon problems generally fall into two broad categories. 

Achilles Tendinopathy

Achilles tendinopathy is a condition involving pain and reduced function in the tendon. It often develops gradually in response to repetitive or increased loading. 

The term “Achilles tendonitis” is commonly used, but “tendinopathy” is often more accurate for persistent symptoms because inflammation may not be the only factor involved. 

There are two primary locations: 

Midportion Achilles tendinopathy: Symptoms affect the middle section of the tendon above the heel. 

Insertional Achilles tendinopathy: Symptoms occur where the tendon attaches to the heel bone. 

The location matters because exercises and other treatment recommendations may differ. 

Achilles Tendon Rupture

An Achilles tendon rupture is a partial or complete tear. It usually occurs suddenly when the tendon is exposed to a force greater than it can tolerate. 

A rupture may happen during running, jumping, pushing off, or rapidly changing direction. It can also occur during a fall or other unexpected movement. 

A suspected Achilles rupture requires prompt medical evaluation. 

What Causes Achilles Tendinopathy?

Achilles tendinopathy often develops after a change in the amount or intensity of activity placed on the tendon. 

Contributing factors may include: 

  • A rapid increase in running or jumping 
  • Beginning a new activity or training program 
  • Increasing exercise intensity or frequency too quickly 
  • Repetitive work or sport demands 
  • Reduced calf strength or endurance 
  • Limited ankle mobility 
  • A change in footwear or training surface 
  • Previous Achilles or lower-leg injury 
  • Certain health conditions or medications 

Achilles tendinopathy can affect athletes and nonathletes. It does not always result from one identifiable injury. 

What Causes an Achilles Tendon Rupture?

An Achilles rupture commonly occurs during a sudden forceful movement, such as: 

  • Pushing off to sprint or jump 
  • Landing from a jump 
  • Quickly changing direction 
  • Tripping or falling 
  • Stepping unexpectedly into a hole 
  • Forcefully stretching the ankle 

Some Achilles ruptures occur in tendons that previously caused no symptoms. Others may be associated with existing tendon changes. 

What Are the Symptoms of Achilles Tendinopathy?

Symptoms may include: 

  • Pain or stiffness along the tendon 
  • Pain at the back of the heel 
  • Morning stiffness 
  • Pain that increases during or after activity 
  • Tenderness when the tendon is touched 
  • Swelling or thickening 
  • Reduced calf strength or endurance 
  • Difficulty running, jumping, climbing stairs, or rising onto the toes 

Symptoms can vary from day to day and may change according to activity. 

What Are the Symptoms of an Achilles Rupture?

A rupture may cause: 

  • A sudden pop or snapping sensation 
  • A feeling of being kicked or struck in the back of the lower leg 
  • Immediate pain near the heel or lower calf 
  • Swelling or bruising 
  • Difficulty walking normally 
  • Difficulty pushing off the injured foot 
  • Inability or significant difficulty rising onto the toes 

Some people can still move the ankle or walk after a rupture, so the ability to move the foot does not rule out a tear. 

Seek prompt medical care if an Achilles rupture is suspected. 

How Are Achilles Tendon Injuries Evaluated?

An evaluation typically begins with questions about: 

  • How and when symptoms began 
  • Whether a pop or sudden injury occurred 
  • Location of the pain 
  • Changes in walking or activity 
  • Work, exercise, and sport demands 
  • Previous injuries 
  • Health history and medications 

The physical examination may assess swelling, tenderness, ankle motion, calf strength, walking, and the ability to rise onto the toes. 

When a rupture is suspected, a healthcare professional may also perform specific clinical tests to assess whether the tendon is intact. 

Is Imaging Always Needed?

No. Achilles tendinopathy can often be identified through the person’s history and a physical examination. 

Imaging may be considered when: 

  • The diagnosis is uncertain 
  • A partial or complete rupture is suspected 
  • Symptoms are not improving as expected 
  • Another condition may be causing the symptoms 
  • Surgery or another procedure is being considered 

X-rays show bones and may identify bone spurs or calcification, but they do not clearly show the tendon. Ultrasound and MRI can provide more information about the tendon when needed. 

Imaging results should be considered alongside symptoms and examination findings. Structural changes may be present without fully explaining a person’s pain or function. 

How Is Achilles Tendinopathy Treated?

Most cases of Achilles tendinopathy are managed without surgery. 

Treatment is individualized and may include: 

  • Education about the condition 
  • Temporary activity modification 
  • Progressive tendon-loading exercise 
  • Calf and lower-body strengthening 
  • Addressing relevant mobility limitations 
  • Gradually rebuilding walking, running, or jumping tolerance 
  • Short-term use of a heel lift or other support when appropriate 

Complete rest is not generally recommended as the long-term solution. Activity may need to be reduced or modified, but the tendon typically needs progressive loading to rebuild its capacity. 

How Can Physical Therapy Help Achilles Tendinopathy?

Exercise is the primary physical therapy treatment for midportion Achilles tendinopathy. 

A rehabilitation program may include: 

 

Progressive Tendon Loading 

Tendon-loading exercises gradually increase the amount of force the Achilles can tolerate. These may include: 

  • Isometric exercises 
  • Heel raises 
  • Eccentric and concentric strengthening 
  • Heavy, slow resistance 
  • Endurance exercises 
  • Plyometric or jumping exercises when appropriate 

Eccentric exercise is one option, but it is not the only effective form of loading. The appropriate exercise, resistance, and range of motion depend on the location of the symptoms and the person’s current capacity. 

Activity Guidance

A physical therapist can help determine how to modify activity without unnecessarily stopping all exercise. 

This may involve adjusting: 

  • Running distance or pace 
  • Hills and speed work 
  • Jumping volume 
  • Exercise frequency 
  • Work demands 
  • Footwear 
  • Recovery time between activities 

Mobility and Movement

Mobility exercises may be appropriate when ankle movement is limited. Strength and movement throughout the foot, ankle, knee, hip, and trunk may also be assessed when relevant to the person’s activity. 

Return to Running or Sports

As the tendon becomes stronger, rehabilitation may progress to: 

  • Faster calf raises 
  • Hopping and landing 
  • Running 
  • Acceleration and deceleration 
  • Changes of direction 
  • Sport-specific drills 

These activities should be introduced gradually based on symptoms, strength, function, and activity demands. 

Are Heel Drops Appropriate for Everyone?

No. Heel-drop exercises performed from the edge of a step may be used for some cases of midportion Achilles tendinopathy, but they may aggravate insertional symptoms by compressing the tendon against the heel bone. 

Do not assume that a generic online Achilles exercise program is appropriate for every type of tendon pain. A physical therapist can identify the location of the symptoms and select an appropriate loading range. 

What About Injections or Other Procedures?

Platelet-rich plasma injections and shockwave therapy have been studied for Achilles tendinopathy, but they are not substitutes for progressive exercise and education. Evidence does not support presenting PRP as a standard treatment that reliably stimulates tendon healing. 

Corticosteroid injections directly into the Achilles tendon are generally avoided because of concern about weakening the tendon and increasing rupture risk. 

A medical provider can discuss whether any procedure is appropriate based on the condition and available evidence. 

Does Achilles Tendinopathy Require Surgery?

Surgery is not typically the first treatment for Achilles tendinopathy. It may be considered when symptoms remain significantly limiting after an extended course of appropriate nonsurgical care. 

The procedure depends on the location and extent of the tendon problem. Surgery may involve removing damaged tissue, addressing bone that irritates the tendon, repairing the tendon, or using another tendon to reinforce the Achilles in selected cases. 

An orthopedic surgeon should explain the potential benefits, risks, and expected recovery based on the individual condition. 

Does an Achilles Rupture Always Require Surgery?

No. Achilles tendon ruptures may be treated surgically or nonsurgically. 

Nonsurgical treatment typically involves protecting the tendon in a position that allows the torn ends to come closer together, followed by a structured rehabilitation program. 

Surgery typically involves repairing the torn tendon, followed by postoperative rehabilitation. 

The decision may consider: 

  • Age and overall health 
  • Activity and sport demands 
  • Location and characteristics of the rupture 
  • Time since injury 
  • Ability to follow a rehabilitation program 
  • Surgical risks 
  • Personal preferences and goals 

Both approaches require careful protection and rehabilitation. The decision should be made promptly with an orthopedic provider. 

What Does Rehabilitation After an Achilles Rupture Involve?

Rehabilitation depends on whether treatment is surgical or nonsurgical and must follow the treating provider’s protocol. 

Recovery commonly progresses through several stages. 

Protecting the Tendon 

A cast, boot, or brace may be used to protect the tendon. The ankle may initially be positioned with the toes pointed downward to reduce strain on the healing tissue. 

Weight-bearing and movement instructions vary. Follow the specific guidance provided by the surgeon or orthopedic team. 

Restoring Movement and Walking 

Ankle motion and weight bearing are gradually progressed when appropriate. Physical therapy may address walking and the safe use of crutches, a boot, or other assistive devices. 

Stretching too aggressively or too early can place unnecessary stress on the healing tendon. 

Rebuilding Calf Strength 

Strengthening begins gradually and progresses from low-load exercises to more demanding calf raises and functional movements. 

Restoring calf strength and endurance can take considerable time, even after routine walking has become comfortable. 

Returning to Higher-Level Activity 

Later rehabilitation may include: 

  • Single-leg strengthening 
  • Faster calf contractions 
  • Hopping and landing 
  • Running 
  • Changes of direction 
  • Work-specific tasks 
  • Sport-specific training 

Progression should be based on healing, strength, movement, symptoms, and the demands of the activity. 

How Long Does Achilles Rehabilitation Take?

There is no single recovery timeline for every Achilles tendon condition. 

Achilles tendinopathy often requires consistent rehabilitation over several months. Symptoms may improve before the tendon has regained the strength and endurance needed for unrestricted running or jumping. 

Recovery after a rupture also takes several months and may continue for a year or longer. The timeline depends on the injury, treatment approach, healing, calf strength, activity demands, and response to rehabilitation. 

Your physical therapist and medical team can help determine when you are ready for each stage. 

How Is Readiness to Return to Activity Evaluated?

Returning to work, exercise, or sports should be based on more than time alone. 

Depending on the injury and activity, a physical therapist may consider: 

  • Pain and symptom response 
  • Ankle mobility 
  • Calf strength and endurance 
  • Heel-rise performance 
  • Walking and running tolerance 
  • Hopping and landing 
  • Change-of-direction ability 
  • Activity-specific movement 
  • Confidence in the injured leg 

No single test can guarantee that another injury will not occur. Return decisions should consider healing, function, goals, and activity demands. 

When Should You Seek Care?

Seek prompt medical attention if you: 

  • Hear or feel a sudden pop near the heel or calf 
  • Feel as though you were kicked in the back of the leg 
  • Cannot push off the foot normally 
  • Cannot rise onto your toes 
  • Develop sudden weakness, swelling, or bruising 
  • Experience a significant injury to the back of the ankle 

An evaluation is also appropriate when gradually developing Achilles pain affects walking, work, exercise, or sports or does not improve with reasonable activity modification. 

Take the Next Step

Achilles tendinopathy and Achilles rupture require different treatment plans, but rehabilitation plays an important role in both. 

At Optimum Therapies, physical therapy is personalized to your condition, current abilities, and goals. Whether you are managing Achilles tendinopathy, returning after a partial injury, or recovering from surgical or nonsurgical treatment of a rupture, your physical therapist can guide you through an appropriate progression. 

Learn more about Orthopedic Therapy at Optimum Therapies. 

Returning to running or sports? Learn more about Sports & Fitness Rehabilitation. 

If you are preparing for or recovering from Achilles surgery, learn more about Pre- & Post-Surgical Rehabilitation. 

Contact our team to find an Optimum Therapies clinic near you. 

References 

This information is intended for general educational purposes and is not a substitute for an individualized medical evaluation or treatment plan.