FEATURED ARTICLE • PHYSIOTHERAPY & REHABILITATION
Ankle Sprain
Classification, assessment, acute management and progressive rehabilitation
Introduction
An ankle sprain is a ligament injury caused by excessive or abnormal movement of the ankle. Lateral ankle sprains are particularly common and often occur when the foot rolls inward while the ankle is loaded. Pain, swelling and difficulty walking may appear immediately, but the full recovery process involves more than waiting for pain to disappear.
If rehabilitation stops as soon as swelling improves, the patient may still have weakness, reduced balance or poor proprioception. These deficits can increase the chance of another sprain. A complete rehabilitation plan therefore progresses from protection and symptom control to movement, strength, balance, functional loading and return to sport or work.
| Key clinical idea Pain and swelling may improve before strength, balance and neuromuscular control have fully recovered. Return to activity should therefore be based on function, not pain alone. |
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Mechanism and Anatomy
In a typical lateral ankle sprain, the foot moves into inversion while the ankle is loaded. This places stress on the lateral ligament complex. The exact ligament injury and severity depend on the direction and force of the movement.
The clinician should not assume that every ankle injury is a simple sprain. Bony tenderness, inability to bear weight, deformity or unusual symptoms can indicate fracture or another significant injury.
Signs and Symptoms
- Ankle pain, often around the lateral side.
- Welling that may develop quickly.
- Bruising in some injuries.
- Tenderness over injured ligaments or bone.
- Reduced ankle range of movement.
- Difficulty bearing weight.
- Reduced confidence or a feeling of instability.
Grades of Ankle Sprain
| Grade | Description | Typical functional effect |
|---|---|---|
| Grade I | Mild stretching or microscopic ligament injury. | Pain with relatively preserved function. |
| Grade II | Partial ligament tear. | Greater pain, swelling and functional limitation. |
| Grade III | Severe or complete ligament disruption. | Marked instability and significant difficulty with weight bearing. |
Clinical Assessment
Assessment starts with the mechanism of injury, pain location, swelling and ability to bear weight. The physiotherapist examines ligament and bony tenderness, ankle movement, gait and stability. The patient's normal activity level and sport or work requirements are also important.
| Assessment domain | What to check | Why it matters |
|---|---|---|
| Mechanism | Inversion, rotation, fall or other force | Helps identify likely structures and injury severity. |
| Weight bearing | Ability and quality of walking | Shows functional limitation and raises fracture concern when severely impaired. |
| Pain/swelling | Location, severity and change | Helps track recovery. |
| Palpation | Ligament and bony tenderness | Supports clinical reasoning and fracture screening. |
| ROM | Dorsiflexion, plantarflexion and functional movement | Identifies movement restrictions. |
| Stability | Appropriate ligament testing when tolerated | Assesses instability. |
| Function | Walking, stairs, hopping or sport tasks when appropriate | Shows readiness for progression. |
Ottawa Ankle Rules
The Ottawa Ankle Rules can help clinicians decide whether radiographic evaluation may be required after an ankle injury. They are used within a broader assessment and should not replace clinical judgment or consideration of the complete injury pattern.
| Referral/red flag Severe inability to bear weight, marked bony tenderness, deformity, neurovascular changes, suspected fracture or dislocation, or unusually severe symptoms require appropriate medical assessment. |
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Early Management
The supplied material presents PRICE—Protection, Rest/relative rest, Ice, Compression and Elevation—as an early framework. In practical rehabilitation, relative rest is preferred over unnecessary prolonged inactivity for uncomplicated injuries. Movement and weight-bearing are introduced as tolerated and as clinically safe.
| Component | Purpose |
|---|---|
| Protection | Avoid additional injury during the irritable phase. |
| Relative rest | Reduce aggravating load while maintaining safe movement. |
| Ice | May provide short-term symptom relief for some patients. |
| Compression | Can assist swelling management when appropriate. |
| Elevation | May help manage swelling, especially early after injury. |
Progressive Physiotherapy Rehabilitation
Phase 1: Symptom Control and Protected Movement
The first goal is to control symptoms while allowing safe movement. The patient may use protection or support when necessary. Gentle ankle movement can begin within tolerance, and weight-bearing is increased as symptoms and injury severity allow.
Phase 2: Mobility and Strength
As swelling and pain settle, restore ankle movement and build strength. Calf strengthening and resisted ankle inversion/eversion can be progressed. The surrounding lower-limb muscles should also be trained when weakness or poor control is present.
Phase 3: Balance and Proprioception
Single-leg balance and controlled reaching tasks help restore neuromuscular control. The difficulty can be increased by reducing hand support, adding movement, changing the surface when safe, or combining balance with functional tasks.
Phase 4: Functional Loading
Walking distance, stairs, jogging, hopping and other tasks can be added according to the person's needs. The clinician should monitor movement quality, confidence and the ankle's response after loading.
Phase 5: Return to Sport or Work
The final stage should reproduce the speed, impact, cutting, jumping and endurance demands of the target activity. A football player may need running, acceleration, deceleration and change-of-direction drills. A worker may need repeated standing, lifting or ladder tasks.
| Phase | Main goal | Examples |
|---|---|---|
| 1 | Control symptoms and protect tissue | Relative rest, support, swelling management, gentle movement. |
| 2 | Restore mobility and strength | ROM, calf strengthening, ankle resistance exercises. |
| 3 | Restore balance and proprioception | Single-leg balance, reaching, controlled stepping. |
| 4 | Restore functional loading | Walking, stairs, jogging, hopping, landing. |
| 5 | Return to sport/work | Speed, cutting, jumping, endurance and task-specific drills. |
Exercise Progression
Exercise should become harder only when the patient can perform the current level with acceptable symptoms and good control. Strength can progress through resistance and repetitions. Balance can progress from stable two-leg tasks to single-leg and more complex functional tasks.
- Ankle mobility exercises.
- Calf raises and progressive calf loading.
- Resisted ankle inversion and eversion.
- Single-leg balance.
- Controlled reaching and stepping.
- Progressive walking and stair work.
- Jogging, hopping and jumping when appropriate.
- Port- or work-specific change-of-direction and endurance drills.
Educational Clinical Case Study
A 22-year-old recreational football player sustains an inversion injury while landing after a jump. The ankle becomes swollen and painful, but he can walk with difficulty.
Assessment checks ligament and bony tenderness, weight bearing, ankle ROM, swelling and stability. Appropriate fracture-screening criteria are considered before treating the injury as an uncomplicated sprain.
Early care emphasizes protection, relative rest, symptom management and progressive movement. Rehabilitation then advances through calf and ankle strengthening, balance training, jogging, hopping and football-specific change-of-direction drills.
Return to play occurs only after strength, balance, confidence and sport-specific functional capacity have improved. Proprioceptive training continues after return because previous ankle sprain is an important risk factor for recurrence.
Recurrence Prevention
A previous ankle sprain increases the risk of another sprain, especially when strength, balance or neuromuscular control remain reduced. Prevention should therefore continue after symptoms settle.
- Continue calf and ankle strengthening.
- Continue balance and proprioceptive exercises.
- Progress training volume gradually.
- Use suitable footwear for the activity.
- Improve landing and change-of-direction control.
- Do not return to high-risk sport simply because pain has disappeared.
Patient Education
Explain that swelling and pain can improve before the ankle is fully recovered. Patients often feel better and then return too quickly to running or sport. The rehabilitation plan should continue until the required strength, balance and functional control are restored.
Frequently Asked Questions
What is the common mechanism of a lateral ankle sprain?
An inversion mechanism is common, particularly when the foot is loaded.
What are the three grades?
Grade I is mild stretching or microscopic injury, Grade II is partial tearing, and Grade III is severe or complete ligament disruption.
Why is balance training important?
It helps restore proprioception and neuromuscular control and can help reduce recurrent sprain risk.
Should an ankle sprain be rested completely?
Relative rest and protection are appropriate early, but safe progressive movement and loading are important as tolerated.
When can sport resume?
When pain and swelling are controlled and strength, balance, confidence and sport-specific functional capacity have been adequately restored.
Key Takeaways
- Most lateral ankle sprains involve an inversion mechanism.
- Always consider fracture and other significant injury during assessment.
- Early symptom control should be followed by progressive movement and loading.
- Strength and balance are essential parts of rehabilitation.
- Return to sport should include sport-specific testing and progression.
- Continued proprioceptive training can help reduce recurrence risk.