The Achilles tendon is the biggest and strongest tendon in the human body. The tendon has the capacity to resist large tensile forces. It stems from a distal confluence of the gastrocnemius and soleus muscle and inserts at the bottom of the calcaneus.
Achilles tendinopathy is an irritation of the Achilles tendon, a thick band of tissue along the back of the lower leg that connects the calf muscles to the heel. The term “tendinopathy” refers to any problem with a tendon, either short- or long-term. The Achilles tendon transmits force from the calf muscles down to the foot when a person pushes the foot off the ground (e.g. Runs or jumps), and helps control the position of the ankle when the foot touches back down on the ground (e.g. Lands).
Achilles tendinopathy results when the demand placed on the Achilles tendon is greater than its ability to function. The condition can occur after a single incident (acute injury) or after repetitive irritation or "microtrauma" (chronic injury). Most often, Achilles tendon pain is the result of repetitive trauma to the tendon that can result in chronic Achilles tendinopathy—a gradual breakdown of the tissue—and is most often treated with physical therapy.
Although Achilles tendinopathy affects both active and inactive individuals, 24% of athletes develop the condition, and an estimated 50% of runners will experience Achilles tendon pain in their running careers. In all individuals, Achilles tendinopathy can result in a limited ability to walk, climb stairs, or participate in recreational activities. Physical therapists help people with Achilles tendinopathy reduce pain in the affected area, and restore strength, flexibility, and mobility to the injured tendon and eliminate swelling when present.
Achilles tendinopathy is linked to several different factors, including:
- Calf muscle tightness
- Calf muscle weakness
- Abnormal foot structure
- Abnormal foot mechanics
- Improper footwear
- A change in an exercise routine or sport activity
Pain can be present at any point along the tendon; the most common area to feel tenderness is just above the heel (known as mid-portion Achilles tendinopathy), although it may also be present where the tendon meets the heel (known as insertional Achilles tendinopathy).
With Achilles tendinopathy, you may experience:
- Morning pain is a hallmark symptom
- Tenderness in the heel or higher up in the Achilles tendon with manually applied pressure
- Pain and stiffness with walking, at its worst with the first several steps
- Tightness in the calf
- Swelling in the back of the ankle
How Is It Diagnosed?
Your Physical therapist will review your medical history and complete a thorough examination of your heel, ankle, and calf. Your physical therapist will assess your foot posture, strength, flexibility, and movement. This process may include watching you stand in a relaxed stance, walk, squat, step onto a stair, or do a heel raise. The motion and strength in other parts of your leg also will be assessed.
Your physical therapist may also ask questions regarding your daily activities, exercise regimens, and footwear, to identify other contributing factors to your condition.
Imaging techniques, such as X-ray or MRI, are often not needed to diagnose Achilles tendinopathy. Although it is unlikely that your condition will ultimately require surgery, your physical therapist will consult with other medical professionals, such as an orthopedist, to determine the best plan of treatment for your specific condition if it does not respond to conservative care.
How Can a Physical Therapist Help?
Physical therapy promotes recovery from Achilles tendinopathy by addressing issues such as pain or swelling of the affected area, and any lack of strength, flexibility, or body control. You and your physical therapist will work together to develop an individualized treatment program to help you achieve your specific goals in the safest and most effective way possible. Your treatment may include:
Education. Your physical therapist will work with you to identify any possible external factors causing your pain, such as faulty footwear or inappropriate movements or exercises. Your physical therapist will assess your footwear and recommend improvements, and develop a personalized exercise program to help ensure a pain-free return to your desired activities.
Pain management. Many pain-relief strategies may be implemented, such as applying ice to the area, putting the affected leg in a brace, using heel lifts, or using therapies such as iontophoresis (a medicated patch placed on the skin that is electrically charged and used to decrease pain and inflammation), or therapeutic ultrasound. These strategies can reduce the need for pain medication, including opioids.
Manual therapy. Your physical therapist may apply hands-on treatments to gently move your muscles and joints in order to improve their motion and function. These techniques often address areas that are difficult to treat on your own.
Range-of-motion treatments. Your ankle, foot, or knee joint may be moving improperly, causing increased strain on the Achilles tendon. Self-stretching and manual therapy techniques (massage and movement) applied to the lower body to help restore and normalize motion in the foot, ankle, knee, and hip can decrease this tension and restore full range of motion.
Gentle exercise. Loading of the tendon (applying weight or resistance to it) through exercise is beneficial for recovery from Achilles tendinopathy. You may begin by performing gentle strengthening exercises in a seated position (eg, pushing and pulling on a resistive band with your foot). You then may advance to exercises in a standing position (eg, standing heel raises).
Muscle-strengthening exercises. Muscle weakness or imbalance can result in excessive strain on the Achilles tendon. Based on your specific condition, your physical therapist will design an individualized, progressive, lower-extremity resistance program for you to help correct any weakness-associated movement errors that may be contributing to your pain.
Functional training. Once your pain eases and your strength and motion improve, you will need to safely transition back into more demanding activities. To minimize the tension placed on the Achilles tendon and your risk of repeated injury, it is important to teach your body safe, controlled movements. Based on your goals and movement assessment, your physical therapist will create a series of activities that will help you learn how to use and move your body correctly to safely perform the tasks required to achieve your goals.
If additional interventions are needed, such as injections, minimally invasive tendon procedures, or surgery, your physical therapist will work with you after your procedure to help you regain motion, strength, and function.
Can This Injury or Condition Be Prevented?
Maintaining appropriate lower-extremity mobility and muscular strength, and paying particular attention to your exercise routine—especially changes in an exercise surface, the volume of exercises performed, and your footwear—are the best methods for preventing Achilles tendinopathy.
When you have experienced an injury, your physical therapist will help guide you through a process that will progressively reintegrate more demanding activities into your routine without aggravating your Achilles tendon. Keep in mind that returning to high-level activities too soon after injury can lead to another episode of pain.
What Kind of Physical Therapist Do I Need?
All physical therapists are prepared through education and experience to treat Achilles tendinopathy. However, you may want to consider:
- A physical therapist who is experienced in treating people with Achilles tendinopathy. Some physical therapists have a practice with an orthopedic or musculoskeletal focus.
- A physical therapist who is a board-certified orthopaedic clinical specialist or who completed a residency or fellowship in orthopedic or sports physical therapy. This physical therapist has advanced knowledge, experience, and skills that may apply to your condition.