Living With Knee Osteoarthritis (Cartilage Wear)

Knee osteoarthritis — medically, osteoarthritis of the knee joint — is the gradual thinning of the cartilage in the knee joint over time. The word sounds like irreversible damage; in fact, with the right management, most people live an active life with pain under control.

Symptoms

• Knee pain that increases with movement and eases with rest
• Brief stiffness in the mornings or after prolonged sitting
• Difficulty going up and down stairs, difficulty squatting
• Sometimes sound, swelling, or a sense of the knee "giving way" in the knee

The biggest mistake: "staying inactive so it doesn't wear down more"

This is the most common and most harmful belief about osteoarthritis. Cartilage is nourished by appropriate load; inactivity weakens it, wastes away the surrounding muscles, and increases pain. Movement at the right dose doesn't wear down cartilage — it protects it.

What helps? (in order of strongest evidence)

1. Strength work. Especially the thigh (quadriceps) and hip muscles. Strong muscles support the knee and reduce the load landing on the joint. This has been shown to have a more lasting effect on pain than medication.
2. Weight management. Every extra kilo lands on the knee multiplied while walking. Even a small amount of weight loss makes a noticeable difference to pain.
3. Low-impact activity. Walking, cycling, swimming — preserves mobility without tiring the joint.
4. Range of motion and balance work.

Extra consideration for an active person

For someone who's trained before and has reduced their activity because of osteoarthritis, the goal isn't giving up sport — it's shifting to a form that doesn't stress the joint, such as switching from running to swimming or cycling.

Is surgery needed?

Not for most people. Knee replacement surgery comes up at an advanced stage, once non-surgical methods can no longer preserve quality of life. Until then, a strong programme both manages the pain and, if surgery is eventually needed, gets the knee more ready for it.

When to see a physician?

Severe pain with sudden swelling and redness, the knee locking, fever, or a deformity after a fall call for emergency assessment.

Frequently asked questions

Can running continue with knee osteoarthritis?

It depends on the pain level and stage; some people can continue at low-to-moderate intensity, while others are advised to switch to low-impact alternatives.

Do supplements like glucosamine help?

The evidence is inconsistent; they haven't been shown to have as strong an effect as strength work and weight management.

Fzt. Bilal Kara runs a programme in person, built around the person's daily life, that manages pain and strengthens the muscles that support the knee in osteoarthritis. You can find more detail on knee osteoarthritis here.