Condition guide · Foot and ankle
Ankle Sprain
Most ankle sprains settle within a year, and exercise-based rehabilitation cuts the odds of doing it again. The awkward finding is that the exercises usually prescribed do not resemble the way ankles are actually re-injured.
In plain words. A lateral ankle sprain is an over-stretch or tear of the ligaments on the outer side of the ankle, almost always when the foot rolls inwards under you. It is the most common injury in physically active people.
The good news is that most of it settles: by twelve months, most people no longer have pain or a feeling of giving way. The less good news is that about one in six sprains it again within that year, and the rehabilitation offered is often too simple to change that.
Key points
- Exercise-based rehabilitation reduces re-injury. Pooled across 14 randomised trials and 2,182 participants, the odds of re-injury at 12 months were lower with exercise than with usual care (OR 0.60, 95% CI 0.36 to 0.99). [2]
- That confidence interval nearly touches 1.0. It is a real finding, but a modest one, and it should be quoted with its uncertainty rather than as a headline. [2]
- More exercise was not better. Meta-regression found no significant association between training volume and the odds of re-injury. [2]
- The exercises given do not match how people get hurt. Across 177 prescribed exercises, 48% were confined to the sagittal plane — forwards and backwards — and only 18% involved a flight phase. Ankles are sprained landing and cutting, not stepping. [3]
- Symptoms mostly resolve, but not immediately. Residual pain fell from 48.6% at 3 months to 6.7% at 12 months; subjective instability from 37.9% to 8.1% over the same period. [4]
- About one in six sprains again within a year — recurrent sprain occurred in 15.8% (95% CI 6.3 to 25.3) by 12 months. [4]
- A brace plus exercise beats rest. The guideline concludes patients benefit most from tape or a brace combined with an exercise programme, and that supervised exercise is preferred over passive treatment. [1]
- Be careful with anti-inflammatories. They reduce pain and swelling, but the guideline warns they are not without complications and may suppress the natural healing process. [1]
What is actually happening
The ligaments on the outside of the ankle resist the foot rolling inwards. When that movement happens faster or further than they can control — landing on someone's foot, stepping off a kerb, changing direction on an uneven surface — the ligament is over-stretched or torn.
What matters for recovery is less the ligament itself than what the injury does to the control system around it. The ankle's sense of its own position is disrupted, the muscles that would normally catch a roll respond more slowly, and confidence in the joint drops. That combination is why a sprained ankle is the single biggest risk factor for spraining the same ankle again, and it is what rehabilitation is actually aimed at.
Where those problems persist — repeated giving way, recurrent sprains, a lasting sense of instability — the term used is chronic ankle instability.
What it feels like
- Immediate pain on the outer side of the ankle, usually with a clear moment of injury you can describe.
- Swelling within hours, often with bruising that tracks down towards the toes over the following days.
- Difficulty putting weight through it at first, easing over days rather than weeks.
- Later, a sense of the ankle being unreliable on uneven ground, or of it threatening to give way.
- In some people, pain that lingers well beyond the point the swelling has gone.
Pain over the bone rather than the ligament, or an inability to take even a few steps, is a reason to be assessed promptly rather than to start rehabilitation.
How it is diagnosed
Clinically, and — importantly — not always on the day. The guideline's position is that the severity of ligament damage is assessed most reliably by delayed physical examination, 4 to 5 days after the injury, once the initial pain and swelling have settled enough for the examination to mean anything. [1]
That is a genuinely useful piece of advice: an examination performed in the first hours often cannot distinguish a mild sprain from a complete rupture, and a re-examination a few days later can. Imaging is used to answer specific questions, principally to exclude a fracture, rather than to grade a sprain.
How physiotherapy and rehabilitation help
Rehabilitation is not trying to make a ligament heal faster. It is trying to restore the control system: the joint's position sense, the speed of the muscular response that catches a roll, the strength to tolerate landing, and the confidence to trust the ankle on uneven ground. The guideline puts this plainly — supervised exercise-based programmes are preferred over passive treatment, because they stimulate the recovery of functional joint stability. [1]
The evidence that it works is real but modest. Pooling 14 randomised trials with 2,182 participants, exercise-based rehabilitation lowered the odds of re-injury at 12 months compared with usual care (OR 0.60, 95% CI 0.36 to 0.99). [2] The reviewers also assessed the therapeutic quality of the exercise in those trials and rated it poor to moderate throughout, which is worth holding on to: this is the benefit produced by programmes that were, by the reviewers' own standard, not especially good. [2]
What a programme involves
| Component | What it is for | Evidence |
|---|---|---|
| Supervised exercise-based rehabilitation balance, joint position sense, strength, progressed over weeks |
Restoring the control system that stops the ankle rolling — the thing that actually prevents the next sprain. | Supported Odds of re-injury at 12 months 0.60 (95% CI 0.36 to 0.99) vs usual care, from 14 trials and 2,182 participants [2]; preferred over passive treatment by the guideline [1] |
| Tape or a brace, combined with exercise | Supporting the ankle while the control system is being rebuilt. | Supported The guideline concludes patients with an acute rupture benefit most from tape or a brace in combination with an exercise programme [1] |
| A brace to prevent recurrence | Reducing the chance of spraining it again, particularly returning to sport. | Supported Ankle braces should be considered an efficacious option for preventing recurrent sprains [1] |
| Multiplanar, single-limb and landing work hopping, cutting, jumping and landing, open-chain joint position sense |
Training the ankle in the situations it is actually injured in, rather than only in straight lines. | Recommended, not yet tested The review that found current programmes too simple recommends exactly this; it has not itself been tested against usual rehabilitation [3] |
| A short period of immobilisation | Settling early pain and swelling. | Limited role May help relieve pain and swelling, but the benefit lies with brace-plus-exercise rather than with rest [1] |
| Increasing the amount of exercise | On the assumption that more rehabilitation means less re-injury. | No added benefit Meta-regression found no significant association between training volume and odds of re-injury [2] |
| Anti-inflammatory tablets | Reducing early pain and swelling. | Use with caution Effective for pain and swelling but not without complications, and may suppress the natural healing process [1]. A decision for your doctor |
| Surgery | Repairing or reconstructing the torn ligament. | Reserved For cases that do not respond to thorough, comprehensive exercise-based treatment [1] — and symptoms keep improving to 12 months, so there is time [4] |
| Electrotherapy ultrasound, TENS, laser, shockwave |
Commonly offered for a swollen, painful ankle. | Not tested here None of the sources cited on this page evaluated them, so this page makes no claim either way |
An amber badge means the sources cited on this page did not test that component — not that it fails. It is a statement about the evidence available here, not a verdict.
The finding that should change what you are given
This is the part of the ankle sprain literature that deserves more attention than it gets. A 2023 systematic review took the 14 randomised trials of ankle sprain rehabilitation and catalogued every single exercise inside them — 177 in total — then asked whether those exercises resemble the way ankles are actually re-injured. [3]
They largely do not. Neuromuscular work made up 44% of exercises, performance tasks 23% and strengthening 20%. But 48% of exercises were confined to the sagittal plane, only 31% were multiplanar, and just 18% involved a flight phase — any jumping or landing at all. [3] Weight-bearing exercises were split almost evenly between single-leg and double-leg stance. [3]
Ankles are not sprained walking forwards. They are sprained landing awkwardly, changing direction, and coming down on an uneven surface or another player's foot. A programme composed largely of straight-line, two-footed, ground-contact exercise is training something other than the situation that injured you. The reviewers' recommendation is more open-chain joint position sense training, multiplanar single-limb challenges, and jumping and landing work. [3]
Two honest caveats. That recommendation is a reasoned criticism of existing trials, not itself a tested programme — nobody has yet randomised the better-designed rehabilitation against the usual kind and shown it does more. [3] And it is most clearly relevant to people returning to sport or physically demanding work. If you sprained your ankle stepping off a kerb and want to walk comfortably, straight-line balance and strength work may be all you need.
What a course of treatment looks like
Assessment first — and possibly twice, since the guideline's position is that ligament damage is graded most reliably 4 to 5 days after the injury rather than on the day. [1] Early on, the aims are settling pain and swelling, getting you walking normally, and fitting tape or a brace.
Then the actual work: balance and joint position sense, strength through the calf and foot, and progressive loading, moving from double-leg to single-leg, from slow to fast, and from straight lines to changes of direction. If you are returning to sport or physical work, the programme should end with hopping, landing and cutting — because that is what you are returning to. [3]
Expect weeks rather than months for ordinary walking, and longer to feel confident on uneven ground. Reviews are for progressing difficulty, not for repeating the same exercises. And note the one thing that does not help: simply doing more of it. Training volume was not associated with re-injury odds, so a well-chosen programme beats a longer one. [2]
Balance training, specifically
Where an ankle has become repeatedly unstable, balance training is the component with the most direct evidence. A meta-analysis of 15 randomised trials and 457 participants found balance training more effective than regular exercise for functionality (SMD 0.81, 95% CI 0.48 to 1.14), instability (0.77, 0.27 to 1.26) and dynamic balance (0.83, 0.57 to 1.10), on fair-to-high quality evidence. [6]
Against strength training rather than general exercise, the picture is narrower: balance training was better for functionality (0.49, 0.06 to 0.92) but not for instability or dynamic balance. [6] A second meta-analysis of nine trials reached the same conclusion from the other direction — balance training improved functional scale scores more, while showing no significant difference from strength training in dynamic stability. [5]
The practical reading: both belong in the programme, and the argument for balance work is strongest for how the ankle feels and functions day to day rather than for any single measurement of stability.
Early movement and progressive loading are the starting point. The component with the most direct evidence for a repeatedly unstable ankle is balance training. [5]
What the evidence supports — and what it does not
Supported
- Exercise-based rehabilitation to reduce re-injury — OR 0.60 (95% CI 0.36 to 0.99) at 12 months across 14 trials. [2]
- Supervised exercise in preference to passive treatment, because it restores functional joint stability. [1]
- Tape or a brace combined with an exercise programme after an acute lateral ligament rupture. [1]
- Ankle bracing to prevent recurrent sprains. [1]
- Delayed physical examination at 4 to 5 days as the most reliable way to assess ligament damage. [1]
- Patience before surgery — instability and pain both keep declining out to 12 months. [4]
Not supported
- Doing more exercise to get a better result. No significant association between training volume and re-injury odds. [2]
- Claiming rehabilitation reliably improves symptoms. Effects on patient-reported and clinical outcomes were inconclusive at every follow-up point. [2]
- Straight-line rehabilitation for someone returning to sport. 48% of prescribed exercises were sagittal-plane only and 18% involved a flight phase. [3]
- Routine anti-inflammatories. They may suppress the natural healing process. [1]
- Early surgery for a first sprain. Reserved for failure of comprehensive exercise-based treatment. [1]
- Rest as the treatment. Immobilisation may relieve early symptoms; it is not what produces the recovery. [1]
An ankle that keeps giving way is a balance and control problem as much as a ligament one, and the same principles apply to unsteadiness more broadly — see falls prevention in older adults.
How certain is this?
Evidence grade: Moderate.
The central claim — that exercise reduces re-injury — rests on 14 randomised trials and 2,182 participants, which is a reasonable base. But only 5 of those 14 were judged at overall low risk of bias, the therapeutic quality of the exercise was rated poor to moderate across all of them, and the pooled odds ratio's confidence interval runs to 0.99. [2] The direction of effect is more secure than its size.
The same review found effects on patient-reported and clinical outcomes inconclusive at 1 month, 3 to 6 months and 7 to 12 months, and the pooled result for re-injury incidence, as opposed to prevalence, was not significant (MD 0.027, 95% CI -2.14 to 2.19). [2] A page that reported only the favourable figure would be misrepresenting the paper.
The natural-history figures are the least precise here. The estimate for subjective instability at 3 months carries a confidence interval from 6.0% to 69.7%, which is almost too wide to be useful; the 12-month figures are much tighter. [4] Treat the early numbers as an indication and the later ones as reasonably solid.
The critique of exercise content is a careful descriptive analysis rather than a test of anything. [3] It shows convincingly that current programmes are simple. It does not show that more complex programmes work better, and it should not be quoted as if it did.
What to expect
Most people walk comfortably within a few weeks and return to normal activity well before the swelling has entirely gone. Bruising tracking towards the toes over the first week is gravity, not deterioration.
Recovery of confidence lags recovery of the tissue. Feeling wary on uneven ground months after the pain has gone is common and is a training problem rather than a sign of damage.
The realistic figures: by 12 months, around 8% still describe the ankle as unstable and around 7% still have pain — down from 38% and 49% at three months. [4] Around 16% will have sprained it again within that year. [4] That last number is the one rehabilitation is trying to move, and it is the reason to finish a programme rather than stop when it stops hurting.
Common questions
Should I rest it or use it?
Use it, within what the pain allows. A short period of immobilisation may help settle early pain and swelling, but the guideline's conclusion is that people benefit most from a brace or tape combined with an exercise programme, and that supervised exercise is preferred over passive treatment. [1] Rest is something you pass through, not the treatment itself.
Do I need a scan?
Usually not. Imaging is used mainly to rule out a fracture. For grading the ligament injury itself, the guideline recommends a delayed physical examination at 4 to 5 days as the most reliable method — more reliable than examining it on the day. [1] If you cannot bear weight at all, or the pain is over bone rather than ligament, get it looked at promptly.
Should I take anti-inflammatories?
Cautiously, and it is a decision for your doctor. The guideline notes they can reduce pain and swelling, but that their use is not without complications and that they may suppress the natural healing process. [1] That is an unusually direct warning for a guideline, and worth weighing against the convenience.
My physiotherapist has me balancing on one leg. Is that enough?
It depends what you are going back to. For comfortable walking, balance and strength work may well be enough. If you are returning to sport, probably not: across the trials, 48% of prescribed exercises stayed in the sagittal plane and only 18% involved any jumping or landing, which does not resemble how ankles are actually re-injured. [3] Ask for the programme to progress to single-leg, multi-directional, landing and cutting work before you return.
Will more exercise protect me better?
Apparently not. The meta-regression found no significant association between how much training people did and their odds of re-injury. [2] What the exercise consists of looks more important than how much of it there is.
I keep spraining the same ankle. Do I need surgery?
Not as a first step. Surgery is reserved for cases that have not responded to thorough, comprehensive exercise-based treatment. [1] There is also a good reason not to rush: instability and pain continue to decline out to 12 months after a first sprain, which led the authors of that review to suggest a longer period of non-operative treatment may be warranted before considering an operation. [4]
Is a brace a crutch that will weaken my ankle?
No. Bracing is recommended alongside exercise, not instead of it, and ankle braces are specifically endorsed as an efficacious option for preventing recurrent sprains. [1] The combination is what the guideline supports.
References
- Vuurberg G, Hoorntje A, Wink LM, et al. Diagnosis, treatment and prevention of ankle sprains: update of an evidence-based clinical guideline. British Journal of Sports Medicine. 2018 Aug;52(15):956. doi:10.1136/bjsports-2017-098106 PMID 29514819 Clinical practice guideline
- Wagemans J, Bleakley C, Taeymans J, et al. Exercise-based rehabilitation reduces reinjury following acute lateral ankle sprain: a systematic review update with meta-analysis. PLOS ONE. 2022 Feb 8;17(2):e0262023. doi:10.1371/journal.pone.0262023 PMID 35134061 Systematic review and meta-analysis
- Wagemans J, Bleakley C, Taeymans J, et al. Rehabilitation strategies for lateral ankle sprain do not reflect established mechanisms of re-injury: a systematic review. Physical Therapy in Sport. 2023 Mar;60:75–83. doi:10.1016/j.ptsp.2023.01.008 PMID 36716507 Systematic review
- Michels F, Wastyn H, Pottel H, et al. The presence of persistent symptoms 12 months following a first lateral ankle sprain: a systematic review and meta-analysis. Foot and Ankle Surgery. 2022 Oct;28(7):817–826. doi:10.1016/j.fas.2021.12.002 PMID 34961654 Systematic review and meta-analysis
- Guo Y, Cheng T, Yang Z, et al. A systematic review and meta-analysis of balance training in patients with chronic ankle instability. Systematic Reviews. 2024 Feb 12;13(1):64. doi:10.1186/s13643-024-02455-x PMID 38347564 Systematic review and meta-analysis
- Mollà-Casanova S, Inglés M, Serra-Añó P. Effects of balance training on functionality, ankle instability, and dynamic balance outcomes in people with chronic ankle instability: Systematic review and meta-analysis. Clinical Rehabilitation. 2021 Dec;35(12):1694–1709. doi:10.1177/02692155211022009 PMID 34058832 Systematic review and meta-analysis
About this guide
If you need assessment
This page explains. It does not diagnose.
An ankle that cannot bear weight, or that is painful over bone rather than ligament, needs to be examined to exclude a fracture. Physiotherapist India publishes information and takes no bookings. Ask a qualified physiotherapist to examine your own case before acting on anything written here.