Why These Exercises Help
After total knee replacement, the knee must relearn how to function with a new joint surface, and the muscles surrounding it must be rebuilt after the surgical trauma and weeks or months of pre-operative deconditioning. Post-operative exercises work by preventing deep vein thrombosis (DVT) through calf pumping, restoring knee range of motion before scar tissue matures, rebuilding quadriceps strength to enable safe walking, and training balance and proprioception that are disrupted by the surgical approach. Early mobilisation on the day of or day after surgery is now the international standard of care.
6 Essential Knee Replacement Recovery Exercises
Ankle Pumps (Day 1 Post-Surgery)
Sets/Reps: 20-30 reps every hour while awake | Difficulty: Beginner
How to do it: Lie in bed or sit in a chair. Alternately point your foot downward (plantarflexion) and pull it upward (dorsiflexion) — as if pressing and releasing a car accelerator pedal. Perform continuously for 30-60 seconds, rest briefly, and repeat.
Physiotherapy tip from Dr. Vaishali Suri: This is the most important exercise you will do in the first 24 hours after surgery. The calf muscle pumping action drives blood back up toward the heart, dramatically reducing the risk of deep vein thrombosis — the most serious immediate complication of knee replacement.
Quad Set (Days 1-7)
Sets/Reps: 3 sets × 15 reps, multiple times daily | Difficulty: Beginner
How to do it: Lie on your back with the operated leg straight. Press the back of your knee firmly into the bed by tightening the front thigh muscle (quadriceps). Hold for 10 seconds, then relax. Feel the muscle tighten — not just the leg straightening.
Physiotherapy tip from Dr. Vaishali Suri: Quadriceps activation is critical from day 1 — the surgical exposure of the knee disrupts the vastus medialis (inner quad) and it must be consciously reactivated to allow safe walking and stair climbing.
Heel Slide (Days 2-14)
Sets/Reps: 3 sets × 15 reps | Difficulty: Beginner
How to do it: Lie on your back with the operated leg straight. Slowly slide your heel toward your buttock, bending the knee as far as comfortable. Use a plastic bag or smooth surface under your heel to reduce friction. Hold briefly at maximum bend, then slide back.
Physiotherapy tip from Dr. Vaishali Suri: The target at discharge from hospital is 90 degrees of knee flexion. At Realign Rehab Clinic, we aim to progress our patients to 120-130 degrees within 6-8 weeks — this is needed for sitting comfortably on Indian-style seating.
Short Arc Quad (Days 3-14)
Sets/Reps: 3 sets × 15 reps | Difficulty: Beginner
How to do it: Lie on your back with a rolled towel under the operated knee, supporting it at 30-40 degrees of bend. Straighten the knee fully, hold for 3 seconds, then lower slowly. The towel stays in place throughout — only the lower leg moves.
Physiotherapy tip from Dr. Vaishali Suri: This exercise trains the terminal range of quadriceps — the last 30 degrees of knee extension that is critical for normal walking mechanics. Patients who do not fully regain terminal extension develop a persistent limp.
Sit-to-Stand Practice (Week 2+)
Sets/Reps: 3 sets × 10 reps | Difficulty: Beginner-Intermediate
How to do it: Sit in a firm, raised chair with armrests. Slide forward to the edge of the seat. Place feet hip-width apart. Lean your trunk slightly forward and push through both feet to stand — do not pull on the armrests. Lower back slowly, controlling the descent with your thigh muscles.
Physiotherapy tip from Dr. Vaishali Suri: Sit-to-stand is one of the most demanding activities in early knee replacement recovery. Use a toilet raiser at home for the first 4-6 weeks to ensure the chair height keeps the knee at a safe angle during this transition.
Stationary Cycling (Weeks 4-8)
Sets/Reps: 10-20 minutes, 5 days per week | Difficulty: Intermediate
How to do it: Set the bike seat high so there is minimal knee bend at the bottom of the pedal stroke. Begin with no resistance. Pedal slowly and increase duration before adding resistance. If the knee does not have enough flexion to complete a full pedal revolution initially, pedal back and forth until the range increases.
Physiotherapy tip from Dr. Vaishali Suri: Stationary cycling is one of the most effective ways to improve knee flexion range after TKR — the repetitive circular motion gently mobilises the joint while simultaneously strengthening the quadriceps and hamstrings in a low-impact environment.
Safety Precautions
- Stop if pain increases beyond mild discomfort or if the knee becomes significantly more swollen after exercise
- Do not kneel on the operated knee until cleared by your surgeon (typically 6-8 weeks minimum)
- Follow all weight-bearing restrictions specified by your orthopaedic surgeon — do not progress faster than directed
- These exercises support but do not replace professional physiotherapy
When to See a Physiotherapist
Physiotherapy should begin on the day of or day after surgery — this is not optional. If you have had knee replacement surgery in Faridabad or the surrounding NCR region and need a structured post-operative rehabilitation programme, Dr. Vaishali Suri at Realign Rehab Clinic, NIT-5 Faridabad provides comprehensive TKR rehabilitation. Early physiotherapy makes the difference between a good outcome and an excellent one. Call +91 9818185589 to start your recovery.
FAQ
How often should I do these exercises?
In the first two weeks, home exercises should be performed 3-4 times daily. From week 2 onwards, formal physiotherapy sessions 3-5 times per week are combined with daily home exercises. Your specific schedule will be provided by your physiotherapist.
Can I drive after knee replacement?
Return to driving depends on whether the operated knee is the right (accelerator) or left, the type of transmission, and your surgeon's assessment of your strength and reaction time — typically 6-8 weeks for right-sided TKR in an automatic car. Dr. Vaishali Suri conducts functional assessments to guide safe return to driving.
How long before I see improvement?
Most patients notice improvement within 2-4 weeks of consistent exercise combined with physiotherapy at Realign Rehab Clinic, Faridabad. Call +91 9818185589 to book.