Exercises After Knee Replacement — Rebuild Strength Safely

Your new knee is designed to move. The exercises you do in the weeks after surgery determine how well it moves for the rest of your life. Stephen Jepson, 93, shows that consistent, purposeful movement is the foundation of lifelong mobility.

Watch Stephen's Video Lessons — $12.99 See Recovery Exercises
Medical Disclaimer: These exercises are general guidance for knee replacement recovery. Every surgery and patient is different. Always follow your surgeon's and physical therapist's specific instructions. Consult your doctor if you experience increased pain, swelling, redness, or fever after exercising.

Your Knee Replacement Recovery Timeline

Weeks 1-2: Activation and Range of Motion

The priority is waking up your quadriceps (the muscle on the front of your thigh), restoring knee bending range, and preventing blood clots. You will do exercises multiple times daily. Walking with a walker begins on day one for most patients.

Weeks 3-6: Building Strength

Exercises progress to standing positions. Knee bending should reach 90 degrees by week two and continue improving. You transition from a walker to a cane. Physical therapy sessions focus on gait training and functional movements like sit-to-stand.

Weeks 6-12: Functional Recovery

Step-ups, longer walks, and stationary cycling begin. Most people can drive, climb stairs normally, and return to daily activities. Strengthening exercises become more challenging to prepare you for an active life.

5 Essential Recovery Exercises

Day 1

Quad Sets

Lying on your back with your leg straight, tighten the muscles on top of your thigh by pressing the back of your knee firmly into the bed. Hold for 5 seconds, release. Repeat 10 times every waking hour. This is the single most important exercise after knee replacement — it reactivates the quadriceps muscle that controls your knee and makes walking possible.

Week 1

Straight Leg Raises

Lying on your back, perform a quad set first to lock your knee straight, then lift your entire leg 6-12 inches off the bed. Hold 3-5 seconds, lower slowly. Do 10 reps, 3 times daily. If you cannot keep your knee straight while lifting, continue quad sets until you build enough strength. This exercise builds the quad power needed for walking without a limp.

Week 1

Heel Slides

Lying on your back, slowly slide your heel toward your buttocks, bending your new knee as far as comfortable. Hold 5 seconds at the end of your range, then slide back. Repeat 10 times, 3 times daily. You may use a towel looped around your foot to help pull the heel closer. Bending range is the key measure of knee replacement success — these slides are how you earn it.

Weeks 3-6

Standing Knee Bends

Stand holding a counter for support. Slowly bend your operated knee by lifting your foot behind you as far as comfortable. Hold 3 seconds, lower slowly. Do 10 reps. This builds active bending range in a functional standing position and prepares your knee for activities like walking up inclines and getting into cars.

6+ Weeks

Step-Ups

Stand in front of a low step (4-6 inches to start). Step up leading with your surgical leg, straighten both legs fully at the top, then step back down leading with your non-surgical leg. Do 10 reps. This is the exercise that bridges the gap between therapy and real life — it rebuilds the strength and confidence for stairs, curbs, and uneven ground.

Stephen Jepson's Recovery Wisdom

Stephen Jepson, at 93, understands that recovery is not about pushing through pain — it is about showing up consistently with purposeful movement. His philosophy of playful, varied exercise applies perfectly to knee replacement recovery: do the work daily, find small ways to challenge yourself, and trust that your body will respond to patient, persistent effort.

Learn Stephen's Complete Movement Program

Play-based exercises designed for every ability level. Build strength, balance, and confidence during and beyond your knee recovery.

Just $12.99 — Lifetime Access
Watch the Video Lessons

Related Exercise Guides

Strength Training for Seniors Low-Impact Exercises for Seniors Stretching for Seniors Walking Program for Seniors Exercises for Arthritis

Frequently Asked Questions

How soon after knee replacement can I exercise?
Exercises like quad sets and ankle pumps begin within hours of surgery, often in the recovery room. Your physical therapist will guide you through the first exercises and progression. Most patients are walking with a walker on the day of surgery or the next morning.
How much should I bend my knee after replacement?
The goal is typically 90 degrees of bending by 2 weeks and 110-120 degrees by 6-12 weeks. You need about 90 degrees to walk normally and climb stairs, 105 degrees to get out of a low chair, and 115 degrees to kneel. Your therapist will measure your progress at each visit.
Is it normal for my knee to swell after exercise?
Mild swelling after exercise is normal during the first 3-6 months. Ice your knee for 15-20 minutes after each exercise session and elevate it. However, contact your surgeon if swelling increases significantly, the knee becomes hot and red, or you develop a fever.
When can I return to normal activities after knee replacement?
Most people drive at 4-6 weeks, return to desk work at 6-8 weeks, and resume low-impact activities like swimming and cycling at 6-12 weeks. High-impact sports like running are generally not recommended. Full recovery with optimal strength typically takes 6-12 months of consistent exercise.