Hold onto a chair or work surface for support.
Squat until your kneecap is directly over your big toe.
Your knees should be no further forward than your toes.
Return to your normal elevated position.
Repeat until you can no longer do it, rest for a minute and repeat twice more.
As you do the exercise, try to squat a little more, but don't bend your knees beyond the right angle.
Short Arc Quadriceps Exercise
Roll up a towel and place it under your knee.
Keep the back of your thigh on the towel and straighten your knee to lift your foot off the floor.
Hold for five seconds and slowly lower.
Quadriceps exercise
Pull your toes and ankles toward you, keeping your leg straight and pushing your knee firmly into the floor.
You should feel tension in the front of your leg.
Hold for five seconds and relax.
This exercise can also be done in a sitting position if you find it more comfortable.
stomach exercise
Lie on your back with your knees bent.
Place your hands under your lower back and pull your belly button down toward the floor or bed. Hold the position for 20 seconds.
Knee brace
Lie on your back.
Pull each knee toward your chest, keeping the other leg straight.
Take the movement to the point where you feel a stretch, hold for about 10 seconds and relax.
Repeat 5-10 times.
If this is difficult, try sliding your heel along the floor toward the bottom to start, and when comfortable, try raising your knee as described above.
https://www.versusarthritis.org/about-arthritis/exercising-with-arthritis/exercises-for-healthy-joints/exercises-for-the-hips/