Achilles tendon rupture is a sudden tear of the Achilles tendon, the thick, strong cord at the back of your ankle that connects your calf muscles to your heel bone. It is essential for walking, running, jumping, pushing off the toes, and changing direction. A rupture can be complete (the tendon fully tears) or partial (some fibres tear, but the tendon remains partly connected).
Many people describe a rupture as feeling like they were kicked or hit in the back of the ankle, sometimes with a pop, followed by sudden pain, weakness, and difficulty walking. Others notice more weakness than pain and feel like the ankle cannot push off properly.
In Australia, Achilles ruptures are frequently seen in recreational sport and in “weekend warrior” scenarios, such as a sudden sprint, jump, or change of direction after a period of reduced training. They can also happen with lower-energy movements in older adults, particularly if there has been ongoing Achilles soreness beforehand.
Physiotherapy for Achilles tendon rupture is vital in both non-surgical and post-surgical pathways. A physiotherapist helps confirm suspicion of rupture, ensures timely referral for imaging and orthopaedic review where required, and then guides Achilles rupture rehab to restore ankle range of motion, calf strength, tendon capacity, balance, and sport-specific function. Good rehabilitation is what turns healing into a confident return to walking, work, and sport.
Key Facts
- Acute Achilles tendon rupture is the most common tendon rupture in the lower limb, with an incidence of approximately 11–37 per 100,000 people. 🔗
- Achilles tendon rupture most commonly affects adults aged 30–50 years and is more than twice as common in men than women. 🔗
- When accelerated rehab with early range of motion is used, there’s no clear difference in re-rupture rates between surgery and non-surgical care. 🔗
- Acute Achilles ruptures often cause sudden pain with an audible “pop” or snapping sensation, and many people describe it as feeling like they were kicked in the back of the lower leg. 🔗
Risk Factors
- Male sex and participation in intermittent high-intensity sport (recreational sport patterns).
- Sudden increase in running, jumping, or sport intensity after a break.
- Previous Achilles pain or stiffness suggesting reduced tendon capacity.
- Reduced calf strength and endurance, particularly poor single-leg heel raise capacity.
- Older age, especially when returning to sport without reconditioning.
- Medication and health factors that can affect tendons (for example, systemic corticosteroids or certain antibiotics such as fluoroquinolones) and metabolic health factors.
Symptoms
- A sudden snap or pop in the back of the ankle, often described as being kicked or struck.
- Immediate weakness and difficulty pushing off the toes when walking.
- Pain and swelling in the back of the ankle and lower calf.
- A visible or palpable gap in the tendon (not always obvious early).
- Inability to perform a single-leg heel raise on the affected side.
- A limp, reduced stride length, or needing to walk on a flatter foot.
- Pain or weakness when trying to run, jump, or change direction (if attempting activity).
Aggravating Factors
- Sudden acceleration, sprinting, or pushing off hard (especially after inactivity).
- Jumping and landing tasks, particularly on a single leg.
- Quick change of direction in court and field sports.
- Walking fast or up hills when the calf tries to generate more force.
- Attempting a heel raise or tiptoe stance soon after injury.
Causes
An Achilles tendon rupture most often happens when the tendon is exposed to a sudden high load, such as pushing off to sprint, jumping, or changing direction. The tendon fails when the force through it exceeds its current capacity.
Capacity is influenced by training history and tendon health. Many ruptures occur in tendons that have underlying degenerative change, even if symptoms were mild or absent. You can think of this as a rope that has gradually frayed in places. The rope may look intact, but a sudden strong pull can cause it to snap.
Other contributing factors can include sudden spikes in activity, poor calf strength and conditioning, reduced ankle mobility, and fatigue. Certain medications and medical conditions can also affect tendon quality. A physiotherapist will consider these contributors because they guide both treatment decisions and long-term prevention.
Achilles ruptures can be complete or partial. Complete ruptures typically cause a major loss of push-off strength and an abnormal calf squeeze test. Partial ruptures may present with more preserved function but still require careful assessment and a structured rehab plan, as a partial tear can worsen if loaded aggressively too early.
How Is It Diagnosed?
Achilles tendon rupture is diagnosed through a combination of history, physical examination, and imaging when needed. A physiotherapist will ask about the exact mechanism (for example, sprinting, jumping, sudden push-off), whether there was a pop or a feeling of being kicked, and what you can and cannot do now.
On examination, physiotherapists commonly use the Thompson test, where the calf is squeezed while you lie face down. If the tendon is intact, the foot should plantarflex (point down). Reduced or absent movement raises suspicion of a complete rupture. Your physio will also assess for a tendon gap, bruising, swelling, and your ability to perform functional tasks safely.
Because Achilles rupture can occasionally be missed early, particularly if pain is not severe, physiotherapists take suspected rupture seriously and will refer promptly for medical review and imaging where appropriate. Early diagnosis matters because treatment decisions and the best window for starting the right rehab pathway are time-sensitive.
Your physiotherapist will also screen for associated issues, including calf strains that mimic rupture, partial tears, and in higher-energy injuries, other ankle or foot injuries that change the rehabilitation approach.
Investigations & Imaging
- Ultrasound
- Common first-line test to confirm a rupture and estimate location and gap size. It can also help distinguish partial versus complete rupture when clinically unclear.
- MRI
- Used when more detail is needed, when ultrasound is inconclusive, or for surgical planning in complex cases. It can show tear pattern, retraction, and associated tendon degeneration.
- X-ray
- Does not show the tendon, but may be used to rule out bony injury (for example, avulsion fracture at the heel) when the mechanism or examination suggests it.
Grading / Classification
- Complete rupture
- The tendon fully tears. Push-off strength is typically markedly reduced and clinical tests such as the Thompson test are often clearly abnormal.
- Partial rupture
- Some tendon fibres remain intact. Symptoms can mimic severe tendinopathy or calf strain, and function may be partly preserved, but the tendon still needs protection and structured rehabilitation.
- Location-based classification
- Ruptures are commonly described by location such as mid-substance (most common), myotendinous junction (higher up), or insertional/avulsion near the heel bone. Location influences healing behaviour and rehab progression.
- Acute versus chronic rupture
- Acute ruptures are usually considered within the first few weeks. Chronic or neglected ruptures are older injuries where the tendon has healed in a lengthened position or there is a persistent gap, often needing specialist input.
Physiotherapy Management
Physiotherapy for Achilles tendon rupture is essential regardless of whether the rupture is treated surgically or non-surgically. The tendon needs time to heal, but it also needs the right amount of progressive loading to regain strength and function. Too much too soon can risk elongation or re-rupture, while too little for too long increases stiffness, weakness, and delayed return to activity.
Most modern pathways use functional rehabilitation. This typically includes a walking boot with heel wedges (to reduce tension on the healing tendon), followed by staged reduction of wedges and gradual reintroduction of ankle range of motion, strength, and functional tasks. Your physiotherapist coordinates with your surgeon or GP and follows clear criteria for progression based on pain, swelling, walking ability, and strength milestones.
A key physiotherapy goal is preventing the tendon from healing in an overly lengthened position. A lengthened Achilles can significantly reduce calf strength and push-off power long term. Your physio balances protection and loading to support strong tendon healing and a better return to sport outcome.
Physiotherapists also manage the rest of your lower limb during recovery. Reduced activity often leads to loss of strength in the hip and thigh, reduced balance, and deconditioning. Keeping the whole leg strong, within safe limits, improves return-to-work and return-to-sport outcomes.
Exercise
Physiotherapy exercises are introduced in phases, based on medical guidance, healing stage, and symptom response. Exact timing varies between surgical and non-surgical protocols, so your physiotherapist will individualise your plan.
Phase 1: Protection and early activation. Early rehab often focuses on safe walking mechanics in the boot, swelling control, and maintaining strength above and below the injury. Your physiotherapist may prescribe gentle toe and foot exercises, safe isometrics for the calf where appropriate, and exercises for the knee, hip and core to prevent rapid deconditioning. The aim is to keep you moving safely while the tendon starts healing.
Phase 2: Controlled range of motion and strength rebuilding. As wedges are reduced and range of motion is gradually reintroduced, physiotherapy focuses on restoring ankle movement without overstressing the tendon. Strength work progresses from low-load calf activation to controlled heel raise patterns. Many people start with supported double-leg heel raises before progressing to more load, more range, and eventually single-leg work. Your physio closely monitors for next-day swelling and pain spikes that suggest overload.
Phase 3: Calf strength, endurance, and tendon capacity. This is where the hard work happens in Achilles rupture rehab. The goal is to rebuild calf strength and endurance that match your sport or work demands. Physiotherapists typically progress loading from controlled slow resistance to more functional strength, and then to elastic, spring-like loading that the Achilles needs for running and jumping. Endurance is critical because many re-injuries happen when people fatigue and technique breaks down.
Phase 4: Running, plyometrics, and return to sport. Return to running usually requires adequate calf strength, good single-leg control, and a tendon that tolerates repeated loading without flare-ups. Physiotherapists use criteria such as single-leg heel raise quantity and quality, hop tolerance, balance, and functional testing, then guide a graded running plan. Plyometrics, acceleration, deceleration, and change-of-direction drills are progressed in a staged way for field and court sports.
Across all phases, your physiotherapist will coach technique. Poor heel raise mechanics or compensations can load other tissues and delay recovery. A good program also builds confidence because Achilles rupture can feel psychologically challenging, especially for athletes.
Activity Modification
Activity modification is crucial early on and remains important throughout rehab. In the early weeks, this often means avoiding barefoot walking, running, jumping, and forceful ankle dorsiflexion. Your physiotherapist will guide safe walking and daily task strategies while protecting the healing tendon.
As you progress, activity modification becomes more about load planning. Many people feel better before the tendon is ready for high-speed loading. Your physio helps you avoid the common trap of doing a big day because pain is lower, then flaring swelling or losing strength progress for the next week.
For work, modifications might include reduced standing time, temporary restrictions on stairs and ladders, and a staged return to manual handling. For sport, it usually means planned progressions for running volume, speed, and jumping exposure rather than an abrupt return.
Manual Therapy
Manual therapy may be used in Achilles tendon rupture rehabilitation to address stiffness in the ankle, foot, and calf that develops after time in a boot. This can include soft tissue techniques to the calf and foot, and joint mobilisation to improve ankle and midfoot mechanics.
Manual therapy is always used alongside active rehab. A physiotherapist uses it to improve movement quality so you can strengthen and retrain walking mechanics more effectively. It is also applied carefully to avoid excessive stress on the healing tendon, particularly early in the rehab timeline.
Postural Retraining
Postural retraining is relevant because Achilles rupture changes the way people walk. Many people adopt a protective limp, reduced stride length, and altered hip and trunk posture. If these patterns persist, they can cause secondary pain in the knee, hip, or lower back and reduce efficiency when returning to running.
Your physiotherapist will retrain gait, step length, foot placement, and trunk control as you transition out of the boot. Later, this extends to running posture, landing mechanics, and deceleration technique, which are essential for reducing overload and improving performance during return to sport.
Bracing & Taping
Bracing and taping are most commonly used during the transition phase out of the boot and during return to activity. Some people benefit from taping to support the ankle and improve confidence during longer walks or early gym work.
Your physiotherapist may also advise on heel lifts in shoes early after boot weaning to reduce tendon strain while strength is still rebuilding. These are usually temporary and progressively reduced as calf capacity improves.
Heat & Ice
Ice can help manage pain and swelling after exercise sessions or long periods on your feet, especially when transitioning out of the boot. Heat may help stiffness in the calf and ankle before mobility work once the early healing phase has passed.
Your physiotherapist will help you use these strategies appropriately. If swelling is frequently high, it may be a sign that your current load progression is too aggressive and needs adjusting.
Education
Education is one of the most important parts of physiotherapy for Achilles tendon rupture. Your physiotherapist explains what healing involves, why the boot and wedge stages matter, and how to progress safely without risking tendon elongation or re-rupture.
Education also covers red flags such as sudden increased pain, a new snapping sensation, major swelling changes, or a sudden loss of function. It includes guidance on return-to-driving, footwear choices, stairs technique, and how to plan your week so the tendon gets repeated, appropriate practice rather than sporadic overload.
For athletes, education includes return-to-sport criteria and realistic timeframes. Tendons can feel improved before they are strong. Understanding this reduces frustration and improves long-term outcomes.
Other
Other physiotherapy strategies often include:
Progressive loading plans: With clear weekly targets for walking volume, gym strength, and later running drills.
Balance and proprioception training: To restore ankle control after time in a boot and reduce re-injury risk.
Cross-training guidance: To maintain fitness (for example, upper-body conditioning, safe cycling or pool work when appropriate) without compromising tendon healing.
Return-to-work planning: For people with standing and manual roles, including staged duties and practical strategies to reduce flare-ups.
Other Treatments
Other treatments can include:
Non-surgical functional rehabilitation: Many ruptures are managed with a walking boot and heel wedges, followed by progressive loading and physiotherapy. This approach aims to provide a balance between protection and early function.
Pain relief: Short-term analgesia may be used as guided by your GP or pharmacist. Pain relief should not be used to push into aggressive stretching or high-load activity early in the healing period.
Medical follow-up: Follow-up appointments and repeat imaging may be used in some cases to monitor tendon continuity and guide progression.
DVT risk management: Immobilisation and reduced mobility can increase clot risk in some people. Your treating doctor will advise if prophylaxis is required. Physiotherapists help keep you moving safely and educate on warning signs such as calf swelling, heat, and shortness of breath that require urgent medical attention.
Surgery
Surgery for Achilles tendon rupture is usually considered when the rupture pattern, tendon gap, activity demands, or patient factors make operative repair the preferred option. Surgical repair aims to re-approximate the torn tendon ends to support strong healing and restore length-tension mechanics.
Even when surgery is performed, rehabilitation remains essential. Surgical repair does not automatically prevent weakness, stiffness, or tendon elongation. Physiotherapy after Achilles tendon surgery focuses on staged protection, then restoring range, strength, and functional capacity using the protocol recommended by the surgeon and best-practice evidence.
In some cases, surgery may be recommended for high-performance athletes or those with specific rupture characteristics, while many other people do very well with non-surgical functional rehabilitation. Decision-making should involve an orthopaedic surgeon, the patient, and the physiotherapist, considering risks and benefits in the context of goals and lifestyle.
Prognosis & Return to Activity
Prognosis after Achilles tendon rupture is generally good with appropriate management, but recovery is not instant. Returning to everyday walking often occurs well before the calf is truly strong again. The Achilles tendon is a high-load structure, and regaining explosive power for running and jumping requires time and progressive loading.
Many people return to work and daily activities in a staged manner, with timelines influenced by whether the job is desk-based or physically demanding. Return to running and sport varies widely and depends on consistent rehab, tendon tolerance, and strength benchmarks.
A common long-term challenge is persistent calf weakness or reduced endurance, particularly if the tendon heals in a lengthened position. This is why physiotherapy-led progression and criteria-based return to activity are so important. With high-quality Achilles tendon rupture rehab, most people can return to sport, but the pathway should be planned and measured rather than rushed.
Complications
- Tendon elongation leading to long-term weakness and reduced push-off power if rehab is progressed too aggressively or protection stages are not followed.
- Re-rupture risk, particularly with premature return to running, jumping, or sudden sprinting and direction changes.
- Persistent stiffness of the ankle and foot after prolonged immobilisation if range of motion and gait are not restored.
- Calf muscle atrophy and reduced endurance, which can affect sport performance and increase overload risk to other tissues.
- Post-surgical complications in operative cases such as wound issues or nerve irritation, requiring close monitoring and appropriate rehab modification.
Preventing Recurrence
- Build year-round calf strength and endurance, including single-leg heel raise capacity, so the tendon is conditioned for sprinting, jumping and change of direction.
- Avoid sudden activity spikes, especially returning to sport after weeks off. Gradually reintroduce speed, hills, and jumping rather than doing all at once.
- If you have Achilles soreness or morning stiffness, address it early with physiotherapy. Improving tendon capacity and load management can reduce rupture risk in a vulnerable tendon.
- Warm up properly before high-intensity sport and include progressive accelerations before maximal sprinting, particularly for intermittent athletes.
When to See a Physio
- You felt a pop or a kick-like sensation in the back of your ankle and now struggle to push off or walk normally.
- You cannot do a single-leg heel raise or you feel significant weakness compared with the other side.
- You have major swelling or bruising around the Achilles and lower calf after a sudden sport movement or fall.
- You suspect a partial tear because pain and weakness persist after a calf injury and progress is not improving as expected.
- You have been diagnosed with an Achilles rupture and want a structured, evidence-based rehabilitation plan to return to work and sport.
- You have increasing swelling, calf pain, or shortness of breath during recovery, which requires urgent medical review.