Knee Manipulation (MUA) Recovery
Manipulation of knee under anesthesia
What a manipulation is
Under anaesthetic, with the muscles completely relaxed, the surgeon bends the knee past the point where it has been sticking. This breaks up the internal scar tissue that has been limiting movement. Nothing is implanted, nothing is cut, and there is usually no new incision — the whole procedure takes only a few minutes.
Why it is done
After a knee replacement, some knees form scar tissue faster than movement can be regained and stiffen despite good therapy. Where bending has stalled or gone backwards in the first months, a manipulation can reset it — and it works best when done relatively early, before the scar tissue matures.
The most important thing on this page
The movement gained on the table is temporary unless it is used straight away. Scar tissue begins reforming immediately, and a knee that is not bent regularly in the first days can be back where it started within a week. This is the one recovery here where the first 72 hours genuinely determine the result.
What happens immediately afterwards
Therapy usually begins the same day or the next, and it is more intensive than after the original replacement. Some teams use a machine that bends the knee continuously, and most ask for bending exercises several times a day rather than once. This intensity is deliberate and time-limited.
Pain in the first days
The knee is usually sore and swollen for several days afterwards, more than people expect from a procedure with no incision — the tissue inside has been torn, even though nothing was cut. Pain relief matters here specifically because being comfortable enough to bend the knee is what makes the procedure work.
Swelling and bruising
Swelling is common in the first week and bruising sometimes appears around the knee or down the leg. Both settle over a couple of weeks. Ice and elevation help, and neither should stop the bending work.
Why bending exercises repeat so often
The exercise programme puts the same bending movements in phase after phase rather than progressing past them. That is not an oversight — holding range is an ongoing task here, not a box ticked in week one, and it stays in the programme for months.
Straightening matters too
Attention naturally goes to bending, since that is what the manipulation was for. Full straightening is at least as important for walking comfortably, and it is the part more easily lost while everyone concentrates on bend.
What range to expect
Most people hold a good part of what was gained on the table, though rarely all of it. Your surgeon will know what range was achieved under anaesthetic, and that number is worth asking for — it tells you what you are working to keep.
Walking and weight
You can usually walk on the knee straight away. It may feel less stable for a few days while it is sore and swollen, and a stick can help briefly. Walking is not restricted by the procedure itself.
Driving
Driving generally becomes reasonable once the knee is comfortable enough to bend into the car and you are not taking medication that affects alertness. For many people that is within a few days to a couple of weeks.
Returning to work
Many people return to desk-based work within a week or two. The bigger constraint is usually finding time for the bending exercises several times a day during the early period, which is worth planning for.
If stiffness returns
Some knees stiffen again despite everything, and that is not a personal failure — some people simply form scar tissue aggressively. Where it happens, options include further therapy, occasionally a second manipulation, or other procedures. Raise it early rather than waiting, because time matters here.
How the following months unfold
The first three days are the critical window. The first two weeks are about intensive, frequent bending. From two to six weeks the focus shifts to holding the range while strengthening returns. From six weeks to three months strength and function build, and by three to six months most people have settled into whatever range they are going to keep.
Staying in touch with your care team
Your own surgeon knows what range was achieved and what they expect you to hold. If your bend is going backwards in the first weeks, contact them promptly — that is the situation where acting early makes the most difference.
Exercises for Knee Manipulation (MUA)
An illustrated, phase-by-phase exercise program for this procedure. View the Knee Manipulation (MUA) exercise program.
Recovery education · Condition guides · Exercise programs
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This guide is general education and doesn't replace evaluation by a licensed provider. Recovery and treatment vary by person — follow the guidance of your own surgeon or care team.