Recovering After a Knee Replacement

Why the first six weeks decide so much

After a knee replacement, scar tissue matures and the joint stiffens into whatever range it is regularly taken through. Get the movement early and you keep it. Miss that window and freeing the knee afterwards is difficult, sometimes requiring a further procedure under anaesthetic.

This is the single most important thing to understand about the recovery: the early weeks are not a gentle warm-up before the real rehabilitation. They are the part that sets your ceiling.

A realistic timeline

Week 1–2. Swelling and pain dominate. The goals are modest and specific: getting the knee fully straight, bending it as much as pain allows, walking short distances with a frame or crutches, and managing swelling with elevation and ice.

Week 3–6. Range improves steadily. Walking distance increases, the walking aid is gradually reduced, and gentle strengthening begins. Most people are aiming for around 90 degrees of bend by week six.

Week 6–12. Strength work becomes the priority. Stairs, sit-to-stand, balance. You will notice real functional gains here, and the operated leg is usually still noticeably weaker than the other.

Month 3–6. Comfortable daily function for most people. Walking normally, managing stairs, returning to low-impact activity.

Month 6–12. Final consolidation. Swelling settles fully, strength continues to improve, and the knee stops being something you think about constantly.

The Nairobi complication

The weeks when your rehabilitation matters most are the weeks when you cannot drive and sitting in a car is genuinely painful. For anyone in Nairobi that is a serious obstacle: a clinic appointment can mean two hours of traffic each way at exactly the point when you are least able to tolerate it.

This is why we run post-surgical rehabilitation as a home visit by default. The most common reason people fall behind their protocol is not lack of effort. It is that getting to the appointment became harder than skipping it.

What helps and what does not

Helps: doing the exercises several times daily in short bursts rather than once in a long session. Getting the knee fully straight: people focus on bend and neglect extension, and a knee that will not straighten causes a limp that persists. Ice and elevation after exercise. Walking little and often.

Does not help: pushing into severe pain, which increases swelling and sets you back. Comparing your progress to someone else’s. And stopping rehabilitation once the pain has gone, which leaves you with a knee that functions until the first time you genuinely need it.

When to call someone

Contact your surgeon urgently for fever, a wound that is hot, red or discharging, calf pain or swelling, or sudden shortness of breath. These are not rehabilitation questions.