And yes – your Achilles heel might quite literally be your Achilles’ heel.
Named after the Greek mythological warrior Achilles, who was said to be strong everywhere except his heel, this tendon is one of the most powerful structures in the body. It helps you walk, run, jump, and push off with every step. But despite its strength, it’s curiously vulnerable to overload when training demands build too quickly.
Achilles tendinopathy is one of the most common overuse injuries in runners and walkers, and is famously excellent at reminding you that enthusiasm is not the same as load tolerance.
The goal of treatment is not simply to calm symptoms. It is to rebuild tendon capacity so you can return to running with confidence and reduced recurrence risk. Sounds good? Call us or book online to make an appointment.
The Achilles tendon connects the calf muscles to the heel bone and plays a major role in walking, running, jumping, and pushing off through the foot.
When it becomes overloaded, symptoms tend to build gradually rather than appear suddenly. Runners and walkers often describe stiffness first thing in the morning that eases once they get moving. And that’s the give – morning stiffness that eases quickly is usually normal, but when it keeps returning with running or starts getting worse over time, it often signals early Achilles tendon overload rather than simple tightness.
Some notice tenderness when pressing along the tendon, a thickened feeling around the lower calf or heel, or a loss of that natural “spring” when pushing off.
A key feature is that familiar pattern where the tendon feels better as it warms up only to feel worse later.
Achilles tendinopathy rarely develops from one specific incident. It is usually the result of accumulated load exceeding the tendon’s current capacity over time.
One of the most common contributors is a sudden change in training load. This might include increasing running distance too quickly, adding hill sessions or speed work without enough preparation, or returning to running after a break. Even well-intentioned training changes can overload the tendon if progression is too rapid.
Footwear can also play a role. Changes in heel drop, switching shoe types, or running in worn-out trainers can alter how forces are distributed through the calf and Achilles. While this is rarely the sole cause, it can contribute to increased strain.
Calf strength and endurance are also important. The calf complex acts as a key shock absorber during running. If it fatigues easily or lacks strength, the Achilles tendon often ends up absorbing more load than it can comfortably handle.
Recovery factors such as sleep quality, overall stress, and training density also influence how well the tendon adapts. When recovery is compromised, the tendon’s ability to tolerate load can decrease, even if training volume has not changed significantly.
Effective treatment begins with understanding how the tendon responds to load.
A physiotherapy assessment will typically explore symptom irritability, movement quality, and strength capacity. This includes testing how the tendon reacts to activities such as calf raises, hopping, and walking, as well as reviewing running history, training patterns, and recovery habits.
From there, load is adjusted rather than removed entirely. In most cases, complete rest is not the goal. Instead, we aim to find a level of activity that keeps the tendon working without provoking excessive irritation.
This may involve temporarily reducing running volume, adjusting intensity, or modifying terrain. Hills and speed work are often scaled back early on, and rest days may be increased between runs. Cross-training can also be introduced to maintain fitness while reducing repetitive tendon load.
The focus is always on finding the balance between enough stimulus for adaptation and not so much that symptoms continue to flare.
Rehabilitation for Achilles tendinopathy is centred on gradually restoring the tendon’s ability to tolerate load.
Early-stage treatment often uses isometric calf loading. These static holds help introduce controlled tension through the tendon without excessive movement, which can be useful when symptoms are more irritable.
As tolerance improves, strengthening progresses into more dynamic work. This includes controlled calf raises performed through different positions to target both the gastrocnemius and soleus muscles. Over time, load is increased through single-leg work, added resistance, and slower, more controlled lowering phases to build strength and control.
Later stages shift towards energy storage and return to impact. This is where hopping, skipping, and low-level plyometric exercises are introduced. These movements help prepare the tendon for the elastic demands of running, where it must repeatedly store and release energy efficiently.
Throughout rehab, running mechanics may also be assessed. Factors such as stride length, cadence, ankle mobility, and calf function can influence tendon loading. Small changes in these areas can sometimes reduce unnecessary strain and improve running efficiency.
Returning to running is guided by how the tendon responds rather than a fixed timeline.
In the early stages, shorter and flatter runs are typically introduced with careful attention to symptoms during and after exercise. The goal is to keep the tendon exposed to load without triggering a flare-up.
A useful guide is how the tendon behaves afterwards. Mild discomfort during a run can be acceptable if it settles quickly and does not worsen the next day. Increasing morning stiffness or a progressive worsening of symptoms usually indicates that load is too high and needs to be adjusted.
Over time, distance, frequency, and intensity are gradually increased as tolerance improves. The emphasis remains on consistency rather than pushing too hard too soon.
A simple daily routine can support tendon capacity and calf strength during rehabilitation.
This typically begins with straight-knee calf raises performed slowly and with control, focusing on both the upward and downward phases. Bent-knee calf raises are then added to target the deeper calf muscles that also contribute to Achilles load management.
Single-leg calf holds can help build endurance and mid-range control, which is important for running stability. Gentle ankle mobility work can support movement through the joint, while light walking or calf movement helps reduce stiffness between sessions.
Progressions depend on symptoms, training load, and stage of recovery, and are best tailored individually.
Achilles tendinopathy can be frustrating for runners, particularly when it disrupts consistency or appears during training build-up. However, it is also one of the more predictable conditions to manage when load is understood and progression is structured.
With appropriate assessment, gradual strengthening, and a carefully planned return-to-running approach, most runners are able to rebuild tendon capacity and return to activity with improved resilience.
The key is not avoiding load altogether, but applying it in a way that allows the tendon to adapt and strengthen over time.
If you are experiencing Achilles pain, stiffness, or recurring flare-ups with running, a physiotherapy assessment can help identify contributing factors and guide a structured return-to-running plan tailored to your goals.
Book in an assessment with our physiotherapy team to understand if it’s an Achilles load issue and get a personalised rehabilitation plan. Call us on 02 9816 5092 or book online to make an appointment at Hunters Hill Physiotherapy.
Information provided here (including text, graphics, images, outbound links, and other material) is for informational purposes only. It is general in nature and is not to be used or considered as a substitute for personalised professional medical advice, diagnosis, or treatment. Always seek the advice of your qualified allied health provider regarding any symptoms, medical conditions, or treatments and before undertaking any new health care regimen.
