What Should I Be Doing 6 Weeks After Knee Replacement?
- Tom Morgan, Chartered Physiotherapist
- Aug 9
- 3 min read
Six weeks is an important point in knee replacement recovery because many people are moving away from the very early post-operative phase and towards more purposeful strengthening.
You may already be walking independently and managing normal household activities, but it is also completely possible to still have swelling, stiffness and a noticeable strength difference between the operated and non-operated leg.
What does recovery often look like at six weeks?
By weeks five to six, many patients are walking without an aid both indoors and outdoors and are beginning to cover useful community distances such as short shopping trips.
A residual limp may still be present, but it should generally be improving rather than worsening. Swelling is usually noticeably reduced compared with the first fortnight, although it can still build through the day.
How much knee bend is expected?
The handbook works towards approximately 115-125 degrees of flexion by the five-to-six-week stage, with full extension. This is a broad guide rather than a rigid deadline.
The most important questions are whether movement is still improving and whether your available range lets you perform everyday tasks more comfortably.
Should you be walking without crutches?
Many people are, but not everyone. If your gait is noticeably better with one stick or crutch, keeping it for longer outdoor walks can be sensible.
Removing the aid should improve independence without creating a worse limp. A smooth walking pattern matters more than being able to say you stopped using crutches by a certain date.
What should your exercises focus on now?
This is the stage where rehabilitation should increasingly challenge strength rather than consist only of gentle movement exercises.
Light resistance bands, sit-to-stands, squats, step work, calf strengthening and quadriceps exercises can all be progressed. Stationary cycling may also be used, with resistance increased once the movement is comfortable.
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Is six weeks the time to start the gym?
For some patients, yes. The guide describes gym progression as commonly beginning somewhere between six and twelve weeks once walking, stairs and basic exercises are controlled.
This does not mean jumping straight into heavy leg training. Early gym sessions should prioritise technique, comfortable range and light resistance.
What about driving?
Many patients discuss return to driving at around four to six weeks, but the calendar alone does not make driving safe. You need to be able to control the car and perform an emergency stop confidently and comfortably, and your surgical team and insurer should be satisfied that you are safe to drive.
Should swelling be gone by six weeks?
No. Swelling can remain for months. What matters is the overall direction.
At six weeks, swelling should usually be clearly better than it was in the first two weeks, even if the knee still becomes puffy or warm after a busy day.
What should you work towards next?
The next stage is about turning basic recovery into real strength. That means gradually increasing resistance, improving stairs and single-leg control, extending walking endurance and preparing for the activities you want to return to.
What if you feel behind at six weeks?
Do not compare your recovery with somebody else's social media timeline. If movement, gait or swelling genuinely appears to be plateauing, discuss it with your physiotherapist. Six weeks is still early enough to make meaningful changes to your rehabilitation.
When should you seek further advice?
Recovery is rarely a perfectly straight line, but new or rapidly worsening symptoms should not simply be pushed through. Contact your surgical team, GP or physiotherapist if pain, swelling, movement or function is moving in the wrong direction rather than gradually improving. Seek urgent medical attention for symptoms such as sudden breathlessness or chest pain, marked one-sided calf swelling, a hot increasingly red joint with fever, sudden loss of function, or other symptoms your surgical team has told you require urgent review.
Want the full knee replacement recovery plan?
This article provides general information and does not replace advice from your own surgeon, physiotherapist or medical team. Recovery varies between individuals and any specific restrictions or weight-bearing instructions from your surgical team should take priority.
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