Article

When you or your family member has successfully undergone robotic-arm assisted joint replacement surgery, this is not the end of the recovery journey but the starting point of relearning to move flexibly. Although advanced robotic arm technology can greatly improve surgical precision, reduce soft tissue trauma, and accelerate early recovery, continuous and correct home rehabilitation and exercise are absolutely essential to make the new joint function effectively. This guide will take you from basic to advanced levels, detailing the various stages of post-operative rehabilitation, helping you safely regain mobility and quality of life.

Why Can’t You Just Rest After Robotic-Arm Assisted Joint Replacement Surgery?

Many patients and families share a common misconception: that after surgery, one should “rest more and lie down more” to avoid wearing out the new joint or pulling on the wound. In fact, excessive rest is a stumbling block to post-operative recovery.

In the early post-operative period, the body’s protective mechanisms cause the muscles around the operated area to temporarily “shut down” or not exert force. If you remain inactive for a long time, not only are you prone to disuse muscle atrophy, but the ligaments and soft tissues around the joint can also develop adhesions, leading to stiffness, instability when walking later, and even a limping compensatory gait. Therefore, early introduction of gentle exercise, such as isometric contractions and other basic training to awaken the muscles, is key to ensuring you can take steady steps.

Three Phases of “Home Rehabilitation” Exercise During the Post-operative Golden Period
Under the guidance of the medical team at Union Hospital, your journey home will be well supported. To give you clear direction at home, we have divided home rehabilitation into three main phases. All movements should be performed gradually, following the principle of “no severe pain.”

Phase One: First Week After Surgery (Awakening Muscles and Promoting Blood Circulation)
When you first return home, the operated area may still be slightly swollen. The goals of this phase are to reduce swelling, prevent venous thrombosis, and awaken the thigh muscles.

• Ankle Pump Exercise: Lie flat on the bed with both legs straight. Pull your toes up toward your body (pointing toward the ceiling) and hold for 3 seconds, then push your foot down (like pressing a gas pedal). Repeat 10 to 15 times. This effectively promotes blood circulation in the lower limbs.
• Quadriceps Setting Exercise: Lie flat with knees straight. Tighten the muscles on the front of your thigh, pressing the back of your knee down firmly against the bed. Feel the thigh muscles tense, hold for 5 seconds, then relax. Repeat 10 times. This is an excellent isometric contraction exercise that protects the wound while preventing loss of muscle strength.

Phase Two: Two to Four Weeks After Surgery (Improving Joint Range of Motion)
When the wound has gradually stabilized, you need to start increasing the flexion and extension angles of the joint. This is an important part of recovery after robotic-arm assisted joint replacement surgery.

• Heel Slide (Knee Flexion) Exercise: Lie flat on the bed. Keep the heel of your operated leg in contact with the bed surface, slowly bend your knee, and slide your heel toward your buttocks. When you feel a stretch, hold for 5 to 10 seconds, then slowly straighten. Repeat 10 times.
• Straight Leg Raise Exercise: Lie flat. Bend the knee of your non-operated leg and place the foot flat on the bed. Keep the entire operated leg straight, tighten the thigh muscles, and raise the leg about 30 to 45 degrees. Hold for 3 seconds, then lower slowly. This greatly strengthens the stability of the front of the thigh.

Phase Three: From One Month After Surgery (Strengthening Muscles and Rebuilding Functional Activities of Daily Living)
The focus of exercise in this phase shifts to practical daily activities, using home surroundings for training.

• Sit-to-Stand Balance Training: Choose a sturdy chair with armrests at an appropriate height. Lean your body slightly forward, use your thigh strength together with your hands lightly pushing on the armrests to stand up slowly. Once steady, sit down slowly. This trains both legs to bear weight evenly, avoiding over-reliance on the non-operated leg.

Summary Table of Home Rehabilitation Exercises
For your easy daily reference, the following table summarizes the key rehabilitation guide strategies for each phase:

Safety and Daily Living Precautions for Home Rehabilitation
When performing home rehabilitation, in addition to doing exercises diligently, environmental safety and lifestyle details are equally important guide points.

• Make Good Use of Assistive Devices: In the early post-operative period (usually the first few weeks), be sure to use a walker or crutches as instructed by your doctor or physical therapist. Do not abandon the assistive device early just because you “feel no pain,” as your muscle strength may not have recovered and you could fall.
• Avoid Hazardous Positions: At home, avoid sitting on sofas or stools that are too low or too soft. Such seats cause excessive flexion and compression of the knee joint, making it difficult to stand up and increasing the risk of injury. Consider using a raised toilet seat or cushion.
• Closely Monitor the Wound and Your Physical Condition: Mild warmth or slight swelling around the joint after exercise is normal and can be relieved by applying ice for 15 minutes. In addition, if you have a chronic disease such as diabetes, be sure to keep your blood glucose under control, as fluctuations directly affect wound healing.

Conclusion and Next Steps
Robotic-arm assisted joint replacement surgery has reconstructed a strong joint structure, while consistent home rehabilitation is the key to giving this new joint its function and strength. By following this guide and continuing targeted exercises in a safe environment, you will surely bid farewell to joint pain and take light, steady steps again.

If you have any concerns during your post-operative rehabilitation or wish to receive more personalized physical therapy guidance, the professional medical and rehabilitation team at Union Hospital is always ready to provide appropriate support. Please contact us, and let us accompany you every step of the way on your road to recovery. 

Frequently Asked Questions (FAQ)

1. When can I start walking after robotic-arm assisted joint replacement surgery?
   Generally speaking, on the first or second day after surgery, once your condition has been assessed as stable by the attending physician and physical therapist, you will be encouraged to get out of bed with a walker and perform simple standing and short-distance walking. Early activity helps prevent complications.

    

2. Is it normal to feel pain during rehabilitation exercises? Should I stop?
   In the early post-operative period, it is normal to feel tightness or mild discomfort when stretching and moving the joint. However, if you experience sharp or severe pain, you should stop immediately and rest briefly. Rehabilitation should be performed gradually, staying within the limit of “tolerable mild pain and tightness.”

    

3. How long will I need to use a walker or crutches?
   This depends on the progress of your individual muscle strength recovery. Generally, assistive devices are needed for balance and weight-bearing for about 4 to 6 weeks after surgery. Only when you can walk steadily without a limp and after evaluation by a physical therapist can you gradually wean off the device.

    

4. What should I do if my knee swells during home rehabilitation?
   Mild swelling after exercise or prolonged standing is common. It is recommended that you elevate the operated limb slightly above heart level while resting and apply ice for about 10–15 minutes several times a day. This effectively reduces swelling and pain. If swelling progressively worsens or is accompanied by fever, seek medical attention promptly.

    

5. Can I climb stairs after surgery?
   Yes, but you need to use the correct technique before your muscle strength has fully recovered. When going up stairs, lead with your “good” (non-operated) leg. When going down stairs, lead with your “operated” leg together with the crutch or walker (mnemonic: good leg goes to heaven, bad leg goes to hell). In the early phase, take one step at a time and always hold the handrail for safety.