Completing the exercises below will benefit your recovery, improve movement in the knee joint and develop the strength of muscles around it.
These exercises should be completed before and after your surgery. Doing these exercises before your operation will benefit your recovery. We recommend you continue these exercises for a minimum of 6 weeks after surgery. Complete your exercises 3 to 4 times a day, repeating each exercise up to 10 times.
Total knee replacement exercises
Ankle pumps
Lying on your back, quickly point your toes up and down 10 times.
Repeat every hour you are awake.
This exercise improves the circulation in the lower limbs, helps to prevent the formation of deep vein thrombosis (blood clots), and reduces swelling.
Knee bracing (static quadriceps) exercises
Lying down or slightly reclined with legs straight. Pull your ankle up and push your knee down firmly against the bed. Hold 5 seconds- relax.
Repeat 10 times.
This exercise helps you to regain control of your knee ready for standing and walking. It also helps you to achieve a straight knee.
Knee bending (flexion) on a sliding sheet
Lying down or slightly reclined with a sliding sheet under your heel. Bend and straighten your knee by sliding your foot up and down the sheet.
Repeat 10 times.
This exercise will improve your knee bend which is important for getting into a car and sitting. Your hamstring muscles will become stronger.
Straight leg raising
Lying down or slightly reclined. Lock your knee straight. Lift your whole leg 10cm (4 inches) off the bed. Aim to keep your leg absolutely straight. Hold for 5 seconds. Repeat 10 times.
This exercise challenges your thigh muscles and tests their ability to support you when you are standing.
Knee stretch (posterior capsular) exercise
Lying with leg straight out in front of you, place a folded-up towel underneath your heel. Allow knee to straighten so you feel a stretch behind your knee. Hold for 30 seconds.
This exercise helps to stretch tight muscles at the back of your leg (hamstrings and calf muscles). If they are significantly preventing your knee from straightening, the Physiotherapist will advise you how often to repeat this exercise.
Exercises in the sitting position
By the second day after your operation, you will begin to notice improvements in your knee bend, muscle power and walking.
The flexibility and bend of your knee is best achieved as soon as possible.
You may have an increase in knee stiffness when you wake up in the morning. This is because your knee is less active at night.
You will need to work hard in the morning to achieve the same range of movements you had the previous evening. Aim to improve range throughout the day.
Your physiotherapist will advise you when to progress to the next set of exercises.
Knee bending (flexion) in sitting
Sit on a chair with your feet on the floor. Bend your knee as much as possible.
Repeat 10 times.
This exercise helps your knee to bend. Your goal is to sit comfortably in a chair with your knee at a right angle as soon as possible. A good bend will be needed in the future for stairs and getting up from a chair.
Self-assisted knee bend exercises
Sitting, cross your legs at the ankles with your good leg on top of the operated leg. Use the good leg to help bend the operated leg backwards.
Repeat 10 times.
Seated lunge exercises
Sitting, bend your operated leg, back as far as you can. Keep your foot flat on the floor and do not allow it to move forwards. Slide your bottom forwards on the chair.
Repeat 10 times.
This will help to bend your knee further.
Knee bends/squats
Standing whilst holding onto a stable surface (as shown in the photo). Slowly bend your knees. Keep your heels on the floor. Slowly return to standing by straightening your knees.
Repeat 10 times.
This exercise encourages the muscles around the knee to work together in a smooth and coordinated fashion. It prepares your knee for getting up and down off low chairs and toilets.
Using a walking frame
For the first day after your operation, you will probably find that you feel more confident using a walking frame especially when walking unsupervised.
Follow this order of movements:
- Move the frame forward.
- Take one small step forward with your operated leg.
- Brace the knee of the operated leg.
- Step through with your other leg whilst using the frame for support.
Tip: do not walk too close to the front of the walking frame.
Using sticks or crutches
Once you are confident with the walking frame you will progress to using sticks/crutches (whichever you and your therapist feel is most appropriate).
Advice for walking with sticks/crutches:
- Move sticks/crutches forward together.
- Step forward so the operated leg is level with the sticks/crutches.
- Place weight as necessary, through your arms onto sticks/crutches.
- Brace the thigh of the operated knee.
- Step your other leg forwards past your operated leg.
- When you feel confident enough to use only one stick/crutch, hold it in the opposite hand to your operated leg.
Walking
Following your operation, you will be encouraged to get up and walk. It is important to walk on a regular basis, and to steadily increase the distance as you recover. It is normal to put full weight through your operated leg.
As soon as possible, try and walk placing one foot past the other in a normal walking pattern. You can progress to using one crutch or a stick held on the side opposite to your operated leg as soon as you feel safe and comfortable to do so. If you are uncomfortable or if you limp when walking, continue to use your walking aids.
Stairs
The therapist will practice with you how to safely use the stairs before going home. To go up and down the stairs, use a banister rail if there is one.
Going down, put the crutch/stick on the step below then step down with the operated leg, followed by the unoperated leg.
Go up leading with the unoperated leg first, followed by the operated leg and then the crutch/stick.