Essential Home Exercises After Knee Surgery

You see your physiotherapist for an hour a day. The other twenty-three hours are up to you.

Doing your "homework" — the small, repetitive exercises done at home between clinic visits — is what separates a good recovery from a great one. A knee replacement gives you a new joint, but the muscles, tendons, and nerves around it still need to be retrained. That retraining happens through consistent, daily movement, not through the surgery itself.

This guide covers the core exercises most surgeons and physiotherapists recommend in the first weeks after knee surgery, along with how to progress safely.

Why Home Exercises Matter So Much

Immediately after surgery, the muscles around your knee — especially the quadriceps — go into a kind of protective "shutdown" due to swelling and pain. If you don't actively wake them up, they weaken quickly, which can slow your walking, increase stiffness, and prolong your overall recovery. Regular, gentle movement also:

• Reduces swelling by helping blood and fluid circulate
• Prevents blood clots (deep vein thrombosis) by keeping calf muscles active
• Maintains and improves your range of motion before scar tissue can restrict it
• Rebuilds the strength needed for standing, walking, and climbing stairs independently

The Core Exercises

1. Ankle Pumps

Move your foot up and down, as if pressing a gas pedal, while lying or sitting with your leg extended. This simple motion pumps blood back toward the heart, which helps prevent clots and reduces swelling in the lower leg. Aim for about 10 repetitions every hour you're awake, especially in the first week.

2. Quadriceps Sets

Tighten your thigh muscle and try to press the back of your knee flat into the bed or mat, holding for 5 seconds before relaxing. This "wakes up" the quadriceps — the muscle group most responsible for standing up, walking, and controlling stairs. Do 10 repetitions, three times a day.

3. Heel Slides

Lying flat, slowly slide your heel toward your hip, bending the knee as far as is comfortable, then slide it back down. This restores bending (flexion) range of motion, which tends to be lost quickly if the knee isn't moved regularly. Aim for 10 repetitions, three times a day, and try to note your best bend each week to track progress.

4. Straight Leg Raises

Lying down with the non-operated knee bent for support, tighten your thigh muscle and lift the operated leg a few inches off the bed, keeping it straight. Hold briefly, then lower slowly. This builds strength without stressing the joint itself and is usually introduced once quad sets feel easy.

5. Seated Knee Extensions

Sitting on a chair or bed edge, slowly straighten the operated knee until the leg is level, hold for a few seconds, then lower with control. This helps regain full straightening (extension), which is just as important for a natural walking pattern as bending is.

A Few Ground Rules

• Little and often beats long and hard. Short, frequent sessions spread through the day are more effective — and safer — than one intense workout.
• Mild discomfort is normal; sharp pain is not. Some soreness during stretching exercises is expected, but sharp or worsening pain is a signal to stop and check with your surgeon or physiotherapist.
• Ice after exercise, not before. Applying ice for 15–20 minutes after your session helps control swelling.
• Follow your specific plan. These exercises are a common starting point, but your physiotherapist may adjust reps, add resistance bands, or introduce standing exercises earlier or later depending on your progress. If you're unsure which stretches or movements to avoid at your stage of recovery, see our guide on exercises to avoid after knee replacement.

FAQs

How soon after surgery should I start these exercises? Most patients begin gentle ankle pumps and quad sets on the day of surgery or the following morning, under the guidance of the hospital physiotherapy team. The exact starting point depends on your procedure and how you're recovering, so always follow your care team's instructions rather than a generic timeline.

What if I can't feel my thigh muscle working during quad sets? This is common in the first few days because of swelling, anaesthesia, and pain. Keep practicing gently — the sensation usually returns within the first week. If it doesn't improve, mention it to your physiotherapist at your next session.

Can I overdo these home exercises? Yes, though it's more common to underdo them than overdo them. Pushing hard into pain, skipping ice afterward, or trying advanced exercises before you're ready can increase swelling and slow you down. Stick to the frequency your physiotherapist recommends and progress gradually.

Do I still need clinic-based physiotherapy if I'm doing these at home? Yes. Home exercises complement, rather than replace, supervised physiotherapy. Your therapist monitors your range of motion, corrects your technique, and progresses your program in ways that are hard to judge on your own.

Takeaway

Consistency beats intensity. Gentle, frequent movement throughout the day does more for your recovery than one painful, heroic session. Treat these exercises as part of your daily routine, track your progress, and always check in with your surgeon or physiotherapist if something feels wrong.

Need a personalised home exercise plan? Contact us to speak with Dr. Abhijit Kale's physiotherapy team in Mumbai.