Knee Arthritis: What You Need to Know
Knee arthritis is a common condition among older adults in which the protective cartilage in the knee joint gradually wears down. Over time, this leads to increased friction between the bones, bone spur formation, pain, and stiffness. Several types of arthritis can affect the knees, including osteoarthritis (the most common), rheumatoid arthritis, and others.
If you have knee arthritis, you may experience pain, swelling, warmth, and stiffness in one or both knees. These symptoms often make walking, climbing stairs, or getting up from a chair more difficult. While there is no cure, proper management — including medication, weight control, and regular exercise — can significantly reduce pain and improve mobility.
Why Exercise Is Important for Knee Arthritis
Regular, gentle exercise is one of the most effective ways to manage knee arthritis. According to health experts, staying active can provide multiple benefits:
Reduces pain, swelling, and stiffness
Improves flexibility and range of motion in the knee
Strengthens muscles around the knee to better support the joint
Enhances balance and reduces the risk of falls
Helps maintain a healthy weight, which decreases pressure on the knees
Improves overall mood and reduces anxiety related to chronic pain
Always consult your doctor or physical therapist before starting a new exercise program, especially if you have severe pain or other health conditions.
5 Safe and Effective Exercises for Knee Arthritis
Here are five gentle exercises recommended for older adults with knee arthritis. Start slowly, breathe normally, and stop if you feel sharp pain.
1. Straight Leg Raises (3 variations)
Purpose: Strengthens thigh muscles and improves balance while putting minimal stress on the knee.
Standing Leg Raise
Stand straight with your back upright, holding onto a sturdy chair or wall for balance.
Slowly lift one leg straight out in front of you, keeping your knee straight and toes pointing forward.
Hold for 3–5 seconds, then slowly lower.
Repeat 10–15 times per leg.
Side-Lying Leg Raise
Lie on your side with legs stacked.
Rest your head on your lower arm and place your top hand on the floor for support.
Keep the bottom leg slightly bent for stability, then lift the top leg as high as comfortable.
Hold for 3–5 seconds, then lower slowly.
Do 10–12 repetitions on each side.
Supine (Lying on Back) Leg Raise
Lie on your back with legs straight and arms at your sides.
Tighten the thigh muscle of one leg and slowly lift it 6–12 inches off the floor, keeping the knee straight.
Hold for 3–5 seconds, then lower slowly.
Repeat 10–12 times per leg.
2. Hamstring Stretch
Purpose: Relaxes and gently stretches the muscles at the back of the thigh.
Lie on your back with both legs extended.
Bend one knee and bring it toward your chest.
Place both hands behind the thigh and gently straighten the leg as much as comfortable, with toes pointing toward the ceiling.
Hold the stretch for 15–30 seconds.
Repeat 2–3 times on each leg.
3. Mini-Squats (Half Squats)
Purpose: Strengthens the front and back of the thighs and buttocks.
Stand with your feet shoulder-width apart, holding onto a chair for balance if needed.
Keep your back straight and look forward.
Slowly bend your knees and lower your body only a few inches (as if sitting down slightly). Do not go past a half-squat.
Make sure your knees stay behind your toes.
Hold for 3–5 seconds, then slowly stand back up.
Repeat 10–12 times.
4. Seated Leg Extensions
Purpose: Strengthens the quadriceps (front thigh muscles) — a very safe exercise for most people with knee arthritis.
Sit straight on a sturdy chair with your feet flat on the floor.
Slowly straighten one knee and lift your foot until your leg is as straight as comfortable.
Hold for 3–5 seconds, then slowly lower.
Repeat 10–15 times per leg.
5. Seated Knee Flexion Stretch
Purpose: Improves knee flexibility and stretches the quadriceps.
Sit on the floor or a firm mat with your back straight and legs extended.
Bend one knee and bring your foot toward your body.
Gently pull the knee closer to your chest with your hands if comfortable.
Hold for 3–5 seconds, then return to starting position.
Repeat 10–12 times on each leg.
Important Tips for Safe Exercise:
Warm up with 5 minutes of gentle walking or marching in place.
Exercise on most days of the week, but rest if your knee is very swollen or painful.
Combine exercise with proper weight management and good footwear.
Consider working with a physical therapist for personalized guidance.
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Regular movement is one of the best medicines for aging knees. Staying active can help you maintain independence and enjoy daily activities with less pain for years to come.
Always check with your healthcare provider before beginning any new exercise routine.
