Arthritis causes pain, swelling and stiffness of the joints.
The joint condition affects around 10 million people in the UK. The two most common types are osteoarthritis and rheumatoid arthritis.
Both osteoarthritis and rheumatoid arthritis can affect many joints in the body, including the knees.
Try these four knee exercises to relieve pain and symptoms of arthritis in the knees.
Straight leg raise
Lie on your back the ground and bend one leg at the knee, holding the other leg straight.
Lift the straight leg slightly off the ground and hold for five seconds, before lowering.
Repeat five times with each leg.
Knee squats
Holding on to the back of a chair for support, squat down until your kneecap is over your big toe.
Straighten the leg and repeat at least ten times with each leg.
As you improve, try to squat a little further, but don’t bend your knees beyond a right angle.
Step ups
Step onto the bottom step of the staircase with the right foot, holding on to the banister of necessary.
Bring up the left foot, and as you do so step back down with the right foot, before stepping back down with the left foot.
Repeat with each leg until you get short of breath.
Leg cross
Sit on the edge of a bed and cross your ankles over each other.
Push your front leg backwards and back leg forwards, against each other until the thigh muscles become tense.
Hold for 10 seconds and relax. Switch legs and repeat, doing four sets per leg.