Physiotherapy for Knee Replacements – Why it’s Needed and What to Expect

Having a knee replacement is a big step towards reducing pain and improving your quality of life. In the days and weeks after surgery, it’s normal to feel sore, stiff, and unsure about how much you should be doing. This is where physiotherapy plays a vital role in your recovery. Whether you’ve recently had surgery or are preparing for one, understanding the role of physiotherapy for a knee replacement can make your recovery smoother and more successful.

Why is Physio essential?

After surgery, the knee will be swollen, stiff, and weak. Without proper rehabilitation, this can lead to long-term limitations in movement and function. Physiotherapy helps by: 

• Restoring knee movement and flexibility
• Reducing pain and swelling
• Rebuilding muscle strength, especially in the quadriceps and glutes
• Improving balance and walking ability
• Helping you return to daily activities safely. 

Early and consistent physiotherapy has been shown to improve outcomes and speed up recovery after a knee replacement. 

What is Prehab and why is it important?

If you’re preparing for a knee replacement, what you do before surgery can greatly affect your recovery. Prehabilitation (prehab) is physiotherapy done before your operation to help prepare your body for surgery and recovery.

How does Physio before a knee replacement help?

Prehab helps by: 

• Gaining as much strength around your knee before surgery
• Improving mobility before surgery
• Reducing stiffness
• Improving confidence and overall fitness 

Going into surgery stronger can make early recovery easier.

Benefits after surgery

Patients who do prehab often: 

• Regain movement faster.
• Find post-op exercises easier.
• Walk more confidently sooner.
• Return to daily activities quicker. 

You’ll also learn some of the exercises you’ll be doing after surgery, so nothing feels unfamiliar.

The role of the Physiotherapist

Your physiotherapist is there to support you every step of the way. They will monitor your progress, adjust your exercises, preform manual techniques, and help you safely return to the activities you enjoy most. No two recoveries are the same, and your program will be designed specifically for you.

Managing post-op pain and swelling

Some pain and swelling after surgery is normal. Physiotherapy helps you manage this safely by: 

• Encouraging regular movement
• Teaching you when to rest and when to move
• Using strategies such as ice and elevation
• Adjusting exercises based on how your knee responds.
• Manual techniques to promote movement and drain swelling. 

Always let your physiotherapist know if pain feels excessive or unusual. 

What to expect after a knee replacement

In the first few weeks after surgery, physiotherapy focuses on movement and basic function. You’ll receive advice on managing pain, icing, elevation, and pacing your activity levels. 

Your physio will also guide you through exercises to: 

• Bend and straighten the knee.
• Activate key muscles around the knee and hip.
• Improve circulation and reduce swelling.
• Walk safely.

Progressing your exercise

As healing continues, physiotherapy becomes more activity based and goal focused. Your physio will tailor the program to your age, fitness level, lifestyle, and personal goals. 

 This stage may include: 

• Strengthening exercises for the legs and core
• Balance and stability training
• Gait (walking) retraining.
• Functional exercises such as stair climbing, sitting to standing, and getting in and out of cars.

How long does recovery take?

Everyone recovers at a different pace, but general timelines include: 

• Weeks 1-6: Reducing pain and swelling, improving movement.
• Weeks 6-12: Increasing strength and independence
• 3-12 months: Continued improvement in strength, endurance, and function 

Sticking to your physiotherapy plan and home exercises plays a significant role in long-term success. 

Tips for successful recovery

• Do your exercises regularly, even on days you feel tired
• Avoid pushing through sharp or severe pain
• Follow advice about walking aids and activity levels
• Be patient with yourself – progress takes time
• Ask questions if you are unsure about anything

A knee replacement can significantly improve your quality of life, but physiotherapy is what helps you make the most of it. With the right guidance, commitment, and patience, you can regain strength, mobility, and confidence in your new knee. 

If you’ve had a knee replacement or are planning one, speaking with a physiotherapist early can make all the difference. If you would like to book an appointment get in touch. Book an appointment online.