Recovery after knee replacement is influenced by your health before surgery, the operation itself and how rehabilitation is paced afterwards. Preparation can help, but no single step guarantees a particular result. This article explains the practical issues to discuss with your surgical and rehabilitation team.
At a glance
- Knee replacement can relieve pain and improve function, but it does not recreate a normal knee.
- Preparation may include strengthening, smoking cessation and management of weight, diabetes and nutrition where relevant.
- After surgery, early movement, pain and swelling control, and paced rehabilitation can support recovery.
- Advice should be tailored to your health, medicines, goals and hospital protocol.
What should you expect from knee replacement?
Knee replacement relieves pain but does not restore a normal knee. The procedure replaces the damaged joint with a precision-engineered prosthesis. Most patients experience significant pain relief and improved function, though deep kneeling may remain uncomfortable and full bending may not be possible. Setting accurate expectations is crucial for post-surgical satisfaction.
What can you do before knee replacement surgery?
Should you do prehabilitation?
Strengthening the quadriceps and hip muscles before surgery may help early recovery. A physiotherapist can tailor exercises for strength, balance and range of motion to your current function and the time available before surgery.
How do weight and diabetes affect recovery?
Higher body mass index and poorly controlled diabetes are associated with a greater risk of complications after knee replacement. If weight or diabetes management is relevant to you, discuss a safe plan with your GP or treating team before surgery. Any diabetes or weight-loss medicines also need an individual plan for the perioperative period.
Why does smoking matter?
Smoking increases the risk of wound-healing problems and infection. If you smoke, your surgical team can advise when to stop before surgery and where to get support.
What role does nutrition play?
Adequate nutrition, including enough protein, supports tissue healing and muscle recovery. Individual needs vary. Ask your treating team or dietitian for advice if you have kidney disease, diabetes, weight-loss concerns or difficulty meeting your nutritional needs.
What happens during surgery to support recovery?
The quality of surgical technique directly affects long-term outcomes.
Key factors include the following:
Accurate implant positioning
Robotic assistance can help the surgeon carry out the planned bone preparation and implant positioning. It does not guarantee a better result or longer implant survival. Implant selection also considers registry data, your anatomy and the surgical plan.
Soft-tissue balancing
The aim is to balance the knee throughout its movement. This requires surgical judgement and is one part of the overall procedure.
Anaesthesia and pain control
A combined spinal and adductor canal nerve block reduces opioid requirements and supports early mobilisation. Intraoperative infiltration of local anaesthetic into the posterior capsule, along with dexamethasone to reduce swelling and duloxetine to reduce nerve sensitisation, forms a multimodal approach that manages post-operative pain without heavy reliance on opioids.
Minimising blood loss
Tranexamic acid is routinely used to reduce bleeding during and after surgery. Limiting tourniquet time decreases muscle pain and swelling during recovery. A knee flexion pillow is used overnight to compress soft tissues and reduce haematoma formation.
Infection prevention
Administering antibiotics before incision and continuing post-operatively is standard practice, as periprosthetic infection, though uncommon, is a serious complication of joint replacement surgery.
What should you do in the first weeks after surgery?
When should you start walking?
Walking usually begins as soon as it is safe after surgery, using an appropriate walking aid. Early movement is part of recovery and helps limit complications associated with prolonged immobility.
How should you manage pain and swelling?
Icing and elevation may help manage swelling and discomfort. Pain relief should be reviewed if pain is preventing movement or sleep. Pain after a knee replacement explains what to expect and how pain is controlled.
How hard should you push rehabilitation?
Doing too much too soon can increase pain and swelling. Early rehabilitation usually focuses on short walks, gentle range-of-motion exercises and rest, then progresses according to your symptoms and physiotherapy plan.
What about sleep and bowel health?
Sleep disturbance is common during early recovery. Opioid pain medicines can cause constipation, so hydration, dietary fibre and any advised bowel medicines should form part of the plan.
How do these steps fit together?
Recovery is influenced by your health before surgery, the operation itself and how rehabilitation is paced afterwards. These measures can support recovery, but they do not guarantee a particular result. Your surgeon, anaesthetist and physiotherapist can tailor the plan to your health, goals and circumstances.
Frequently asked questions
When should I start prehabilitation?
Several weeks can be useful if time and symptoms allow. A physiotherapist can tailor the program to your current function and the time available before surgery.
Does weight affect recovery after knee replacement?
Higher body mass index is associated with a greater risk of some complications. The aim is not a fixed number for everyone. If weight loss is relevant, it should be safe, realistic and discussed with your treating team.
Why shouldn’t I push hard with physiotherapy in the first few weeks?
Doing too much too soon can increase pain and swelling. Early rehabilitation usually focuses on controlled walking, gentle movement and rest, then progresses according to your symptoms and physiotherapy plan.
What can I do to reduce my risk of infection?
Follow your team’s instructions on skin preparation, medicines and wound care. If you smoke or have diabetes, discuss risk reduction with your treating team before surgery.
Will I be able to kneel after knee replacement?
Some people can kneel after recovery, while others find it uncomfortable. A knee replacement does not guarantee pain-free kneeling or full movement. Your result depends on several factors.
How can you prepare for recovery after knee replacement?
Dr Pai assesses knee arthritis and performs knee replacement surgery in Melbourne. If you would like to discuss preparation and recovery in the context of your health and goals, you can arrange a consultation.
Written by Dr Vishal Pai
Vishal is an experienced knee surgeon based in Bayside, Melbourne. He consults at Sandringham Orthopaedic Specialists and operates at The Avenue Hospital and Calvary Holmesglen Private Hospital. His practice focuses on sports knee surgery, including ACL reconstruction and meniscal repair, as well as robotic knee replacement.