What Actually Happens When You Sprain Your Ankle?
An ankle sprain occurs when the ligaments that stabilise the joint are overstretched or torn — most commonly the lateral ligaments on the outside of the ankle. This typically happens when landing awkwardly from a jump, changing direction suddenly, or stepping on uneven ground.
Sprains are graded by severity:
- Grade 1 — mild stretching of the ligament with no significant tearing. Some tenderness and swelling, but weight bearing is usually possible.
- Grade 2 — partial tear of the ligament. More significant swelling, bruising and pain. Weight bearing is painful and the ankle may feel unstable.
- Grade 3 — complete rupture of the ligament. Substantial swelling, bruising and instability. Weight bearing may be impossible in the acute phase.
Beyond the ligaments themselves, other structures can also be affected during a sprain — cartilage damage, tendon involvement, and even small fractures can occur alongside ligament injury. This is one of the reasons an accurate assessment matters rather than just assuming it's a straightforward sprain.
Why Ankle Sprains Are More Serious Than They Look
The statistic that surprises most people:
up to 70% of people who sprain their ankle will re-injure it if they don't complete proper rehabilitation. That's not bad luck — it's a predictable consequence of what happens to the ankle after a sprain.
When ligaments are injured, the tiny nerve receptors within them that provide proprioception — your body's sense of joint position and movement — are also damaged. Even after the pain and swelling have settled, this proprioceptive deficit often remains. The result is an ankle that doesn't react quickly enough to protect itself when you step awkwardly, leading to repeated sprains and eventually chronic ankle instability.
Ligaments also don't always return to their original strength and length after a sprain. Without targeted rehabilitation to rebuild strength and retrain the neuromuscular system, the joint is left weaker and more vulnerable than it was before the injury.
Symptoms to Watch For
Common signs of an ankle sprain include:
- Pain and swelling around the ankle joint, particularly on the outer side
- Bruising that may spread into the foot or track up the leg
- Stiffness and difficulty bearing weight
- A feeling of instability or the ankle "giving way"
- Reduced range of motion
If your pain is severe, you cannot bear weight at all, or there is significant bony tenderness, it's worth getting assessed promptly to rule out a fracture. The Ottawa Ankle Rules are a clinical tool physios and doctors use to guide whether imaging is needed — your physio can apply these at your initial assessment.
What Proper Rehabilitation Looks Like
The goal of ankle sprain rehabilitation isn't just to get the swelling down — it's to restore full strength, mobility, stability and confidence in the joint so that you can return to your activities without fear of re-injury.
At Active Balance, rehabilitation typically progresses through several phases:
- Acute phase — first 48 to 72 hours Managing swelling and pain through the
PEACE & LOVE principles (see our blog post on this), gentle range of motion work and protected weight bearing as tolerated.
- Restoration phase Hands-on therapy to address stiffness and swelling, progressive exercises to rebuild ankle strength and mobility, and early balance work to begin retraining proprioception.
- Strengthening and neuromuscular phase Progressive loading of the ankle and surrounding muscles — calves, peroneals, tibialis anterior and hip stabilisers all play a role in ankle stability. Balance and coordination exercises become more challenging as strength improves.
- Return to sport or activity phase Sport-specific movement patterns, agility work and high-level testing to confirm the ankle is genuinely ready for the demands of your activity. This phase is where many people cut corners — and where re-injury most often occurs.
When to Seek Assessment
If you've recently sprained your ankle, we'd recommend getting it assessed even if it feels relatively minor. Early guidance on loading, movement and rehabilitation sets you up for a much smoother recovery than waiting to see how it feels.
You should seek prompt assessment if:
- You cannot bear weight on the ankle
- There is significant bony tenderness over the ankle or foot
- The swelling or bruising is severe
- The ankle feels grossly unstable
- Symptoms are not improving after a few days of basic management
The Bottom Line
A rolled ankle deserves the same respect as any other injury. With the right assessment and rehabilitation, most people make a full recovery and return to everything they were doing before — often with a stronger, more resilient ankle than they had previously.
Don't just walk it off.
Book online or call us on (08) 7123 4148 and let us help you get back on your feet properly.
