Exercises After Knee Replacement: A Safe Home Programme Guide

The best exercises after knee replacement start gently on day one and progress over weeks: ankle pumps, quadriceps sets and heel slides first, then straight leg raises, seated bending, standing strengthening and balance work. Done consistently two to three times a day, they restore knee bend, straightening and walking confidence. Always follow your surgeon's protocol.

Total knee replacement (TKR) replaces the worn joint surfaces, but the muscles, scar tissue and walking pattern around the new knee still need retraining. That retraining happens through exercise. This guide explains a typical stage-wise home programme that physiotherapists use, why each exercise matters, and how to stay safe. It is general information, not a substitute for the instructions your operating surgeon and physiotherapist give you.

Why exercises matter so much after knee replacement

After surgery, the knee is swollen and the thigh muscle (quadriceps) temporarily "switches off" because of pain and swelling. Scar tissue starts forming within days. If the knee is not moved regularly in the early weeks, that scar tissue can limit how far the knee bends and straightens later. Exercises help to:

• Reduce swelling by pumping fluid out of the leg through muscle action.
• Lower the risk of blood clots by keeping the calf muscles active.
• Regain full knee straightening, which is essential for a normal walking pattern.
• Build knee bend for sitting on a chair, climbing stairs and getting in and out of a car.
• Rebuild quadriceps, hip and calf strength so you can give up the walker and later the stick.
• Improve balance and confidence, which reduces the chance of falls.

In our experience, the patients who do best are not the ones who push hardest on one day, but the ones who exercise a little, several times a day, every day.

Before you start: basic safety rules

• Follow your discharge summary first. Some surgeons restrict certain movements or weight bearing for specific reasons. Their protocol always comes before any general guide.
• Take prescribed pain medicine on time, ideally 30 to 45 minutes before your main exercise session, as advised by your doctor.
• Exercise on a firm bed or a mat on a stable surface. Avoid very soft mattresses for strengthening work.
• Keep the wound dressing clean and dry. Do not rub creams or oils on the incision unless your surgeon has advised it.
• Breathe normally. Do not hold your breath while holding a muscle contraction.
• Expect a stretch and mild discomfort, but stop if you feel sharp or severe pain.
• Have someone nearby for standing exercises in the first weeks.

Stage 1 (roughly days 1 to 14): wake up the muscles and control swelling

In the first two weeks, the aim is to control pain and swelling, get the knee as straight as possible and start bending it gently. Most of these exercises are done lying on your back or sitting.

Ankle pumps

Lying down with the legs straight, move both feet up towards you and then point them away, like pressing a car accelerator. This keeps blood moving through the calf. Many protocols suggest 10 to 20 pumps every hour while you are awake.

Quadriceps sets (static quads)

With the leg straight, tighten the front thigh muscle and press the back of the knee down into the bed. Hold for five to ten seconds and relax. This is the foundation for straightening the knee and lifting the leg.

Heel slides

Lying on your back, slowly slide the heel of the operated leg towards your buttock, bending the knee as far as is comfortable, then slide it back. A plastic sheet or a dupatta under the heel can reduce friction. Go to a gentle stretch, not severe pain.

Gluteal squeezes

Squeeze your buttock muscles together, hold for five seconds and relax. This keeps the hip muscles active, which support your walking.

Knee straightening with a heel prop

Place a small rolled towel under the heel (not under the knee) so the back of the knee hangs free, and let gravity gently straighten the knee for a few minutes. Many patients make the mistake of keeping a pillow under the knee for comfort. This feels nice but can lead to a knee that never fully straightens.

Stage 1 exercise table

These numbers are typical starting points. Your physiotherapist may change them depending on your pain, swelling, age and general health.

Stage 2 (roughly weeks 2 to 6): build bend, straightening and strength

By now the stitches or staples are usually removed and the wound is healing. The focus shifts to steadily increasing knee bend, getting the knee fully straight and building strength for walking with less support.

Straight leg raises

Lying on your back, bend the healthy knee with the foot flat. Tighten the thigh of the operated leg so the knee is straight, then lift the leg to the height of the other knee, hold for two to three seconds and lower slowly. If the knee bends as you lift (called an extensor lag), go back to quadriceps sets for a few more days.

Seated knee bending (chair slides)

Sit on a firm chair with the foot on the floor. Slide the foot backwards under the chair to bend the knee, hold for a few seconds, then return. You can use the healthy foot in front of the operated ankle to gently add pressure.

Short arc quads

Place a rolled towel or a small bolster under the knee. Lift the heel so the knee straightens fully, hold for three to five seconds, then lower. This targets the last part of straightening, which is often the hardest.

Seated knee extension

Sitting on a chair, straighten the operated knee fully, hold, and lower slowly. Later, your physiotherapist may add a light ankle weight.

Side-lying hip abduction

Lying on the healthy side, lift the operated leg sideways, keeping it straight and slightly behind you, then lower slowly. This strengthens the hip muscles that keep your pelvis level when walking.

Standing exercises with support

Holding a kitchen counter or a sturdy table, practise heel raises, mini knee bends (only a small range) and marching on the spot. Always have the support in front of you and someone nearby in the early weeks.

Stage 3 (roughly weeks 6 to 12): function, balance and endurance

Most patients are walking with a stick or without aids by this stage, depending on their surgeon's advice. Exercises now look more like daily activities.

• Step-ups: Step up onto a low, stable step with the operated leg and step down slowly, holding a rail.
• Sit to stand: Stand up from a chair without pushing with your hands, then sit down slowly. Use a higher chair first.
• Balance training: Stand with feet close together near a counter, progressing to standing on one leg for a few seconds.
• Stationary cycling: If your surgeon allows it and your knee bend is sufficient, a static cycle is excellent for bend and endurance.
• Walking practice: Gradually increase the distance and time of your walks on flat ground.

Common mistakes to avoid

1. Keeping a pillow under the knee: It feels comfortable but encourages a bent, stiff knee.
2. Doing everything once a day: One long session leads to more pain and swelling. Short, regular sessions work better.
3. Skipping straightening work: Families often focus on bend, but a knee that does not straighten fully causes limping.
4. Pushing through severe pain: Aggressive forcing can increase swelling and set you back.
5. Stopping too early: Strength continues to improve for months. Stopping at six weeks often leaves the leg weak.
6. Copying another patient: Every surgery, implant and protocol differs. Follow your own plan.

How to tell if you are progressing well

Your physiotherapist will usually measure knee bend and straightening with a goniometer at regular intervals. Signs that you are on track include:

• Swelling and night pain gradually reducing over the weeks.
• Being able to lift the straight leg without the knee bending.
• Knee bend improving steadily, enough to sit comfortably on a chair and climb steps.
• Walking longer distances with less support and a more even pattern.

If bend has stopped improving for two weeks, or the knee is getting stiffer, tell your surgeon and physiotherapist early. Stiffness is much easier to manage when it is addressed in time.

When to call your surgeon urgently

Exercises are safe for most people, but certain signs need medical attention without delay:

• Fever, chills, or increasing redness, warmth or discharge from the wound.
• The wound opening or bleeding through the dressing.
• Calf pain, tenderness, or swelling of the whole leg that does not settle with elevation, which can suggest a blood clot (DVT).
• Sudden breathlessness, chest pain or coughing blood, which needs emergency care.
• A fall onto the operated knee, a sudden inability to bear weight, or a feeling that the knee has given way badly.
• Severe pain that is not controlled with the medicines prescribed.

Getting help with knee replacement exercises at home in Jaipur

Travelling to a clinic in the first few weeks after a knee replacement is tiring and painful, especially for elderly patients or those living in upper-floor flats. Our post-surgery rehabilitation programme at home is designed for exactly this stage. Dr. Rohit Kumar, the physiotherapist at LifeWell Physio, visits patients at home anywhere in Jaipur, including Malviya Nagar, Jagatpura and Pratap Nagar, to assess the knee, measure range of motion, check walking with the walker or stick and set a safe, personalised exercise plan.

After the first in-person home assessment, follow-up exercise and therapy guidance can continue through live video sessions when suitable, so progress is checked regularly without unnecessary travel. In-person visits continue whenever hands-on treatment or closer supervision is needed. Every plan is aligned with your operating surgeon's protocol. If you or a family member has had, or is about to have, a knee replacement, send us a WhatsApp enquiry to discuss home physiotherapy.