If you’ve had a knee replacement or you’re preparing for one, the question matters more than most:
When should you start physiotherapy after knee replacement?
The short answer: immediately.
Rehabilitation usually begins within 24 hours after surgery while you are still in the hospital. From there, structured physiotherapy care continues for weeks and months to restore strength, movement, and confidence. Timing plays a major role in how well you recover.
The First 24–48 Hours After Surgery
Physiotherapy starts early to prevent stiffness and complications.
In the hospital, you’ll typically begin with:
- Gentle range-of-motion exercises
- Assisted walking with a frame
- Circulation exercises to reduce swelling
- Breathing and mobility drills
The goal at this stage is not strength. It’s movement.
Early motion helps:
- Reduce joint stiffness
- Improve circulation
- Lower the risk of blood clots
- Begin restoring knee bend
Many patients are surprised at how quickly they are asked to stand and walk. This early activity is essential for recovery.
Weeks 1–2: Regaining Movement
Once discharged, structured outpatient physiotherapy becomes critical. At this phase, Physio focuses on Knee pain and:
- Improving knee bend and straightening
- Managing swelling
- Normalising walking pattern
- Activating quadriceps muscles
A common milestone during this period is achieving around 90 degrees of knee flexion. Every patient progresses at a different pace, but early movement is key.
Pain and swelling are normal during this phase. The focus is steady progress, not perfection.
Delaying physiotherapy during these early weeks can lead to:
- Increased stiffness
- Poor range of motion
- Compensatory walking patterns
Weeks 3–6: Building Strength and Stability
By this stage, movement should be improving. Now the focus shifts toward rebuilding strength.
Physiotherapy during this phase includes:
- Progressive strengthening exercises
- Balance and stability training
- Gait correction
- Functional tasks such as stairs and sit-to-stand movements
This period is crucial for preventing long-term weakness.
The quadriceps muscle often shuts down after surgery. Without structured rehab, patients may continue to limp or feel unstable for months.
Consistent physiotherapy during weeks 3 to 6 significantly improves long-term outcomes.
After 6 Weeks: Returning to Function
Beyond six weeks, rehabilitation becomes more functional.
Goals may include:
- Walking longer distances
- Improving stair confidence
- Returning to low-impact activities
- Increasing endurance
- Restoring independence in daily tasks
Some patients recover quickly. Others need longer support. Age, pre-surgery strength, and overall health influence recovery speed.
Full recovery after a knee injury or knee replacement can take several months. Physiotherapy helps ensure that strength and mobility continue to improve rather than plateau.
What Happens If You Delay Physiotherapy?
Delaying rehab is one of the most common reasons for ongoing stiffness after knee replacement.
Without early movement:
- Scar tissue can limit range
- Muscles weaken further
- Walking patterns become inefficient
- Swelling persists longer
In some cases, significant stiffness may require additional medical intervention.
Starting early and progressing gradually reduces these risks.
How Much Pain Is Normal?
Mild to moderate discomfort during rehabilitation is expected. Sharp, worsening, or severe pain is not.
Physiotherapy challenges the knee safely, not aggravate it excessively. A structured program balances movement, strengthening, and recovery.
If pain increases significantly, exercises can be adjusted. Progress should feel steady, not overwhelming.
When to Contact Your Surgeon Instead
While physiotherapy addresses mobility and strength, certain symptoms require medical review. Contact your surgeon or GP if you notice:
- Increasing redness around the wound
- Fever
- Calf pain or swelling
- Wound discharge
- Sudden increase in pain
These symptoms may indicate complications and need prompt assessment.
Physio in Maroubra for Knee Replacement Rehab
For patients recovering from knee replacement in Sydney’s Eastern Suburbs, structured physiotherapy provides guidance, progression, and reassurance throughout recovery.
The Physio treatment in Maroubra focuses on restoring mobility, rebuilding strength, and helping you return to daily activities safely and confidently.
Physio in Bondi Junction for Post-Surgical Recovery
If you prefer treatment closer to Bondi Junction, our Physio Bondi clinic supports post-surgical recovery with progressive strengthening and movement-based rehabilitation tailored to your stage of healing.
Summary
When should you start physio after knee replacement? Immediately.
Rehabilitation begins in the hospital and continues through structured outpatient care. The first six weeks are especially important for regaining movement and preventing stiffness.
Knee replacement surgery fixes the joint. Physiotherapy restores the function. Starting early and progressing properly can make the difference between a stiff knee and a confident return to daily life.
