6 Weeks After Your Total Knee Replacement

Where You Should Be at 6 Weeks

By six weeks, most patients are walking with increasing confidence — either without a walking aid or transitioning away from one. Managing basic daily tasks independently — dressing, showering, preparing meals, and moving around your home — should be largely achievable, though the knee may still feel quite different from your pre-operative normal.

Swelling is one of the most consistent features of early knee replacement recovery and is entirely expected at six weeks. Knee replacements provoke a significant inflammatory response within the joint, and swelling can take three to six months — or longer — to fully resolve. Ice packs and elevation when resting remain useful and are encouraged.

Stiffness after sitting for prolonged periods is also very common. You will notice the knee is stiffer when you first stand, and loosens up after a minute or two of walking. This is completely normal and will gradually improve over the coming months.

Knee Flexion — Your Most Important Target

The most closely monitored measure at six weeks is your knee flexion — how far you can bend the knee. The general target is between 90 and 110 degrees by this point. Ninety degrees allows most functional activities: sitting comfortably in a chair, climbing stairs, and getting in and out of a car. Progress beyond 90 degrees substantially improves quality of life and recreational capacity.

If your flexion is below 90 degrees at six weeks, it is important to contact our rooms. Early intervention — intensive physiotherapy, and in some cases a procedure called manipulation under anaesthetic (MUA) — is far more effective when initiated promptly. Scar tissue forms quickly in a healing joint, and stiffness that is not addressed early can become a longer-term limitation.

Full extension — being able to fully straighten the knee — is equally important and is typically achieved earlier in recovery. If you cannot fully straighten the knee, mention this to your physiotherapist and contact our rooms.

For most patients, Dr Liew performs knee replacement using a kinematic alignment technique, which aims to restore the natural geometry and axis of motion specific to your knee. This approach supports a more natural feel to the joint over time, which is reflected in the range of motion as recovery progresses.

Return to Driving

Return to driving depends on which knee was operated on and the type of vehicle you drive.

If it was your right knee, the general guidance is around six weeks before resuming driving. The right leg controls braking, and you need to demonstrate to yourself — not just assume — that you can perform an emergency stop without hesitation, discomfort, or delay.

If it was your left knee and you drive an automatic vehicle, return to driving is often possible earlier — around three to four weeks — as the left leg plays no active role in an automatic vehicle. However, you must still be off strong pain medication and feel genuinely confident behind the wheel.

Before returning to driving, perform a simple test: sit in the car in a safe location and simulate applying sharp pressure to the brake. If there is significant pain, hesitation, or weakness, wait a little longer. Your insurer should also be notified of your recent surgery — most policies require medical clearance before resuming driving following a procedure. If you have any doubts, contact our rooms before driving.

Physiotherapy — Keep Going

Physiotherapy is the single most important factor in achieving a good range of motion after knee replacement, and six weeks is not the time to ease off. If you have been attending physiotherapy sessions, continue. If you have been managing independently with a home exercise programme, maintain that commitment and consider increasing the frequency or adding hydrotherapy sessions.

The emphasis at this stage shifts from managing early pain and swelling to actively building flexion, strength, and functional movement. Key exercises include:

• Quadriceps strengthening — straight leg raises, terminal knee extensions, seated leg press at low resistance
• Flexion exercises — heel slides, seated knee bends, stationary cycling (start with the seat high, gradually lower as flexion improves)
• Hydrotherapy — pool-based exercise is extremely well-tolerated and highly beneficial at this stage
• Walking — the foundation of recovery; build distance gradually, aiming for longer and flatter routes
• Stair practice — stepping up and down with alternating feet, rather than one leg leading, should be the progressive goal

Avoid any high-impact activity — running, jumping, or heavy loading through the joint. This is a long-term recommendation for implant longevity, not merely a short-term caution.

Return to Work

Return to work follows the same general framework as hip replacement, adjusted for the demands of your role.

For desk-based or sedentary work, many patients return between three and six weeks, once pain is manageable without strong medication and they can sit and move comfortably. At six weeks, you should be able to manage an office environment comfortably if you have not already returned.

For light physical roles — standing, walking, light manual tasks — six to eight weeks is a reasonable timeline, depending on how your recovery is progressing.

For heavier physical or manual work, a return closer to three to four months is more appropriate. This will be reviewed specifically at your three-month appointment where Dr Liew can assess your strength, function, and readiness.

If your employer requires a medical certificate for return to work, contact our rooms and we can arrange this.

Kneeling and Floor Activities

Kneeling after total knee replacement is a common and entirely reasonable goal for many patients. However, it is not something you should attempt at six weeks. The soft tissues overlying the implant need time to mature, and placing direct pressure on the front of the knee too early can be uncomfortable and counterproductive.

Most patients can begin attempting to kneel carefully — with padding — from around three to six months post-operatively. Many patients find kneeling is permanently less comfortable than before surgery, even once fully recovered. This is not a sign of a problem; it reflects the changed anatomy and soft tissue configuration around the front of the knee.

For now, use a high chair, avoid floor-level activities, and do not attempt to kneel, squat deeply, or sit cross-legged without guidance from your physiotherapist.

What to Watch For

The vast majority of patients move through six weeks without significant complications. Nonetheless, it is important to know what warrants prompt attention.

Contact our rooms or present to hospital if you notice:

• Increasing redness, warmth, or swelling around the wound site — beyond the expected post-operative settling
• Any discharge from the wound — clear, cloudy, or bloody
• Fever above 38°C
• Calf pain, tightness, or new swelling in the lower leg — this requires urgent assessment to exclude deep vein thrombosis
• Sudden shortness of breath or chest pain — call emergency services immediately
• Knee flexion significantly below 90 degrees with no improvement week-on-week — early intervention is important
• A sudden increase in pain that is markedly different from your expected post-operative discomfort

If you are ever uncertain whether something warrants a call, please call. Our rooms are here to support you through every stage of your recovery.

Frequently Asked Questions