Knee Arthritis

Knee arthritis can make simple jobs feel harder. Stairs, walking, chairs and longer days on your feet can all feel stiff or sore. Physiotherapy may help you understand your symptoms, plan exercise and manage flare-ups safely.

For a broader overview, start with our knee pain guide. You may also find our knee treatment page and knee exercises guide useful.

Knee osteoarthritis, often called knee OA, is common from mid-life onwards. It can affect cartilage, bone, joint lining and the muscles that support the knee. However, scan changes do not always match pain. Many people stay active with the right mix of education, pacing and strength work.

For wider arthritis information, see our osteoarthritis page. If you also notice hip pain or stiffness, visit our hip arthritis guide. Hip strength and movement can affect knee load.

Knee Arthritis Quick Guide

Common symptoms: pain, stiffness, swelling, reduced bend, clicking and trouble with stairs.
Best first steps: education, exercise, pacing and a flare-up plan.
Helpful exercise: strength work, cycling, walking, balance and gentle mobility work.
Seek review: if pain, swelling, giving way, night pain or walking limits are getting worse.

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Knee Arthritis Physiotherapy: What Helps Most?

Knee arthritis physiotherapy usually works best when it combines education, exercise, pacing and symptom control. The aim is not just less pain. It is also better walking, stairs, balance and confidence.

Most plans start with five foundations:

Education: learn what OA is, what it is not, and how to plan flare-ups.
Exercise therapy: build leg strength and support the knee joint.
Load management: keep moving without repeatedly overloading the joint.
Weight support: useful when body weight adds to knee load.
Pain options: use symptom relief when it helps you stay active.

Should You Keep Walking With Knee Arthritis?

In many cases, yes. Walking can support joint health, fitness and confidence. The dose matters. If walking increases swelling later that day or the next morning, reduce the distance, slow your pace, or split the walk into shorter blocks.

Use a walking amount that feels steady for one week. Then increase only one thing at a time, such as distance, pace or hills. See our walking tips for knee pain guide for more detail.

Use This Flare-Up Rule

During activity: mild discomfort can be acceptable if it stays controlled.
After activity: symptoms should settle within 24 hours.
Next morning: swelling or marked stiffness means the previous load was probably too high.
Next step: reduce one variable, then build again.

What Is Knee Osteoarthritis?

Knee osteoarthritis is a long-term joint condition linked with pain, stiffness, swelling and reduced function. It can affect the inner knee, outer knee or kneecap joint. Symptoms often come and go. This pattern is common and does not always mean the joint is getting worse.

OA can involve cartilage changes, bone changes, joint lining irritation, muscle weakness and movement confidence. That is why a good plan looks beyond the X-ray and focuses on symptoms, strength and function.

Why Does Knee Osteoarthritis Happen?

Knee OA usually develops over time. Several factors can increase risk or speed up symptoms:

Age: risk rises with each decade.
Past injury: previous meniscus injury or ligament injury can increase risk.
Body weight: higher joint load can affect symptoms during walking and stairs.
Work and sport load: repeated heavy knee demand can irritate a sensitive joint.
Genetics: family history can play a role.

If you are unsure whether your pain is arthritis or another knee problem, start with our knee pain causes guide.

Symptoms of Knee Arthritis

Knee OA symptoms vary. Common patterns include:

pain with stairs, hills, squatting, kneeling or long standing
stiffness after sitting, first thing in the morning or after a flare-up
swelling or a full feeling in the joint
reduced knee bend or straightening
clicking or grinding, which is often not serious on its own
reduced confidence with walking, stairs, sport or exercise

If your knee locks, gives way repeatedly, swells quickly after an injury, or you cannot take weight, seek prompt assessment. If you suspect a ligament injury, these ACL tear symptoms can help you decide what to do next.

How Is Knee Osteoarthritis Assessed?

A physiotherapist will usually assess your story, swelling, range of motion, strength, walking, stairs and tasks such as sit-to-stand. This helps identify what your knee can handle now and what needs to improve.

Imaging is not always required. When imaging is needed, an X-ray often provides enough information. MRI or CT may help when your clinician suspects another diagnosis or when surgical planning is being considered.

For Australian guidance on assessment and treatment priorities, see the Osteoarthritis of the Knee Clinical Care Standard.

Knee Arthritis Treatment Options

Knee arthritis treatment should match your symptoms, goals and current capacity. The table below outlines common options and when they may help.

Option	Why it may help	Starting point
Exercise therapy	Improves strength, control and load tolerance.	Start with low to moderate strength work two to three times per week.
Walking or cycling	Supports fitness and joint movement with manageable load.	Use short sessions and monitor next-day swelling.
Pacing	Reduces flare-ups from sudden spikes in steps, hills, gym or gardening.	Increase only one variable at a time.
Bracing or supports	May improve comfort during a flare-up or heavier activity.	Use them short term while strength improves.
Medical options	May reduce pain enough to stay active.	Discuss medicines or injections with your GP.

Exercise Therapy

Research supports exercise as a key part of knee OA care. The best program is the one you can do often. Your physiotherapist may include:

Strength: quadriceps, glutes, calves and hamstrings
Mobility: knee bend, knee straightening, hip and ankle movement
Balance and control: single-leg control, stepping and change of direction
Fitness: walking, cycling, swimming or intervals

If your main challenge is stairs, see our knee pain on stairs guide.

Knee arthritis low step-up exercise with Erin coaching knee control — Building strength with controlled step-ups.

Education, Pacing and Flare-Up Planning

Many flare-ups come from a sudden load jump. This may include more steps, new gym work, gardening, travel or a change in routine. A simple pacing plan helps you stay active while symptoms settle.

Try holding activity steady for seven to ten days. Then increase one variable by a small amount. This may be time, load, distance, hills or frequency.

Weight Management Support When Relevant

Weight management can reduce knee load for some people. It can also make exercise easier. A physiotherapist may coordinate care with your GP, dietitian or exercise physiologist when weight management is part of the plan.

Bracing, Taping and Helpful Gear

Some people find a knee brace, taping, walking aid, footwear change or orthotics helpful during a flare-up. These tools work best when they support activity and exercise, rather than replace strength work.

Pain Relief Options

Medicines and injections can reduce symptoms for some people. They work best when paired with exercise, education and pacing. Your GP can guide medication choices. A physiotherapist can help time activity so pain relief supports rehabilitation.

When Surgery Becomes Part of the Discussion

Some people with severe symptoms and major daily limits consider surgery after a solid trial of non-surgical care. If you want to learn more, see our knee replacement guide and our post-operative physiotherapy overview.

How Hard Should Knee Arthritis Exercises Feel?

Exercise should feel useful, not threatening. Mild discomfort during exercise can be acceptable if it settles quickly and does not increase swelling later.

Good response: symptoms settle within 24 hours and confidence improves.
Too much: swelling, limping, sharp pain or worse stiffness the next morning.
Adjustment: reduce range, load, speed or volume before stopping completely.

How a Physiotherapist May Help

Physiotherapy aims to improve how your knee tolerates daily life. Your plan may include:

a clear diagnosis and plan, including what to avoid short term
strength and movement coaching tailored to your goals
hands-on treatment when appropriate to settle symptoms
walking, stairs and sit-to-stand retraining
return-to-activity planning for work, sport, travel and hobbies

If your main issue is pain across several joints, our joint pain relief page explains broader management options.

When Should You Seek Prompt Review?

Book a prompt assessment if knee pain is worsening, walking distance is dropping, or swelling keeps returning despite pacing. Seek urgent medical care if you cannot take weight, develop sudden severe swelling after injury, have fever with a hot swollen joint, or have calf swelling and shortness of breath.

Knee arthritis stair confidence with Erin supervising older female patient — Regaining confidence with stairs.

Knee Arthritis FAQs

Can knee arthritis get better without surgery?

Many people improve with education, exercise therapy and a steady plan. While osteoarthritis changes on scans may remain, pain and function often improve when strength, confidence and load tolerance improve.

Should I keep walking with knee arthritis?

Walking often helps knee arthritis when the dose is right. Start with a distance that does not increase swelling later that day or the next morning. Then build gradually.

What exercises should I avoid with knee arthritis?

Avoid exercises that repeatedly spike pain and swelling for the next 24 hours. Deep, heavy squats and high-impact jumping can be too much early on. Start with controlled strength and gradually build range and load.

Is cycling good for knee osteoarthritis?

Cycling often suits knee OA because it builds leg strength and fitness with lower impact. Seat height matters. A low seat can overload the kneecap joint, so setup is important.

Do injections fix knee arthritis?

Injections may help short-term symptom relief for some people. They do not reverse arthritis. Most people do best when injections support an exercise-based rehab plan.

When should I consider a knee replacement?

Consider a knee replacement discussion when symptoms remain severe despite a well-run non-surgical plan, daily function stays limited and quality of life suffers. Your GP or surgeon can discuss suitability, risks and expected outcomes.

If you want to keep reading, these pages may help:

What to Do Next

If knee pain or stiffness keeps returning, start simple. Move daily, build strength two to three times per week, and avoid sudden load spikes.

If swelling, giving way, night pain, or walking limits are getting worse, book an assessment. A physiotherapist can check the likely driver and guide a tailored progression.