Knee replacement recovery in Adelaide: a week-by-week guide

One of the most important conversations before knee replacement is not about the surgery itself — it is about what comes after. Recovery from knee replacement is predictable, but it takes genuine time and effort. The surgery replaces the joint; rehabilitation restores the function. Both halves matter equally, and understanding what to expect makes the whole process significantly easier to navigate.

The surgery replaces the joint. Rehabilitation restores the function. Both halves of the process matter equally.

Hospital stay

Most patients stay in hospital for two to three days after knee replacement. Within hours of the operation — typically that same afternoon or evening — physiotherapists will help the patient stand and take their first steps, usually with a walking frame. This early mobilisation is not just encouraged; it is an important part of reducing the risk of complications such as blood clots and improving the early recovery trajectory.

Pain is managed with a combination of medications, and most patients are surprised to find that with good pain control the early mobility is more manageable than they expected. Discharge home usually requires being able to safely use the stairs and manage basic mobility with a walking aid.

Weeks 1 and 2

The first two weeks at home are focused on wound care, swelling management, pain control, and beginning to restore range of motion. Swelling is normal and expected — elevating the leg above heart level and applying ice (wrapped in a cloth to protect the skin) for 20 minutes at a time, several times a day, helps significantly. Keeping the leg elevated when resting reduces the discomfort considerably.

Gentle walking around the home is encouraged from day one. The goal is not distance — it is establishing a safe, controlled gait and preventing the joint from stiffening. A physiotherapist will typically visit at home or see the patient at a clinic early in this period. The exercises in these first weeks — knee straightening, heel slides, quad sets — are simple but critically important for the long-term result.

Driving is not possible in this early period, regardless of which knee was operated on.

Weeks 3 to 6

By weeks three to six, most patients are walking more comfortably and beginning to increase their distances gradually. Stair climbing becomes safer as the quadriceps strength returns. Most patients begin weaning off their walking aid during this period, though the pace of this varies considerably between individuals and there is no benefit to rushing it.

Driving is generally discussed with the surgeon at the four to six week mark. For a right knee, returning to driving typically requires adequate strength and reaction time in the operated leg; for a left knee (with an automatic vehicle), the timeline may be shorter. This decision should always be confirmed with your surgeon rather than assumed.

Physiotherapy continues during this phase, with exercises progressing to strengthen the quadriceps, improve range of motion, and begin normalising walking pattern.

Two to three months

By two to three months, most daily activities are manageable with reasonable comfort. Patients who work in desk-based roles often return to work in this period. Those in more physically demanding occupations typically need longer. Shopping, light cooking, and social activities are generally well within reach.

Flexion continues to improve during this phase. Achieving adequate bend in the knee (typically around 90 to 110 degrees or more, depending on individual factors) is one of the primary rehabilitation goals. Swelling, while reduced, is often still present to some degree, particularly after activity.

Three to six months

This is often the period where patients notice the most significant improvement in how they feel about the result. Pain with daily activities is substantially reduced or absent for most people. Lower-impact activities — swimming and stationary cycling are particularly well-suited to this phase — are comfortable and actively encouraged.

Some residual stiffness or a sensation of tightness, particularly first thing in the morning or after sitting for extended periods, is normal at this stage and usually continues to improve. Swelling after activity, rather than at rest, is also a common and normal pattern during this phase.

Six to twelve months

Recovery from knee replacement continues for up to twelve months, and some patients notice ongoing improvement beyond that point. By six months, most patients are functioning well across a broad range of activities. Higher-demand activities — golf, light hiking, cycling on roads — become accessible during this phase for appropriately active patients.

The knee will likely still not feel entirely "normal" at six months. The sensation of a replacement knee is different from the original joint, and this takes time to become familiar. Most patients find this less bothersome than they expected once pain has resolved and function has improved.

What improves outcomes

Pre-operative fitness. Patients who are stronger and more physically active before surgery recover faster. Even a few weeks of targeted exercise — often called prehabilitation — can make a meaningful difference to early recovery.

Body weight. A healthy BMI reduces the load on the new joint, improves wound healing, reduces the risk of complications, and correlates with better long-term outcomes. Where possible, working towards a healthy weight before surgery is worthwhile.

Committing to physiotherapy. There is no substitute for this. The exercises, particularly in the first few months, drive the recovery. Patients who engage consistently with their rehabilitation programme consistently do better than those who do not.

Pain management. Allowing pain to become uncontrolled in the early post-operative days makes everything harder — it limits mobility, disrupts sleep, and slows the rehabilitation process. Taking prescribed medications as directed and communicating with the team if pain is not well controlled is important.

Managing expectations. Knee replacement is an excellent operation, but it is not a return to a 20-year-old knee. Understanding what the operation can realistically achieve — significant pain relief, improved mobility, better quality of life — and what it may not deliver (a completely natural-feeling joint, the ability to kneel comfortably) is an important part of arriving at the right outcome.

Common questions and concerns

Clicking or clunking sounds after knee replacement are very common and almost always normal. The metal and plastic implant surfaces move differently to natural cartilage. This is covered in a separate article.

Numbness around the scar is normal and experienced by most patients. The outer (lateral) side of the knee in particular often remains numb for months. This gradually improves but may not return fully to normal; in most patients, it is not a source of significant bother.

The knee feeling different or foreign is something almost all patients notice early on. The proprioceptive feedback from a replacement joint is different from the original. Most people find this sensation settles and becomes less noticeable over the first six to twelve months.

When to contact the rooms: new pain, increasing swelling, a wound that is not healing, a fever, or calf pain or swelling (which could indicate a blood clot) should all prompt a call to the rooms or, in urgent situations, a presentation to the emergency department. Individual guidance from your care team should always take precedence over general information.