Knee Injuries: What You Need to Know

Knee injuries involve damage to the bones, ligaments, cartilage, tendons, or other structures that make up the knee joint. Because the knee is the largest joint in the body and plays a major role in walking, running, and jumping, it is particularly vulnerable to injury.

These injuries can occur suddenly during sports or accidents, or develop gradually from repetitive stress and overuse.

With the right diagnosis, rehabilitation, and activity modification, many people can reduce pain, restore knee function, and return to normal activity safely.

Below is a clear guide to what knee injuries are, how they happen, what to watch for, how they’re diagnosed, and treatment options available.

Why the Knee Joint Matters

The knee joint plays several key roles:

• Movement and mobility: allowing walking, running, squatting, and jumping
  • Weight-bearing support: absorbing large forces during everyday activities
  • Joint stability: ligaments and surrounding muscles help control knee movement

The knee can experience forces several times body weight during activities like running, making it especially susceptible to injury if the joint is overloaded or unstable.

How Knee Injuries Happen

There are several ways knee injuries can develop:

Sudden Trauma or Impact
Direct blows, collisions, or falls can damage bones, ligaments, or cartilage within the knee.

Twisting or Pivoting Movements
Rapid changes in direction or awkward landings can tear structures such as the meniscus or knee ligaments.

Overuse and Repetitive Stress
Repeated activities like running, jumping, or kneeling can gradually irritate tissues in the knee and lead to conditions such as tendon irritation or runner’s knee.

Age-Related Degeneration
Over time, cartilage in the knee can wear down, leading to joint pain and stiffness such as with osteoarthritis.

Recognising the Risk Factors

Factors that may increase the likelihood of knee injuries include:

• Participation in high-impact or pivoting sports
  • Sudden increases in training load
  • Weakness in the quadriceps, hamstrings, or hip muscles
  • Poor movement mechanics or alignment
  • Previous knee injuries
  • Age-related joint changes

How Knee Injuries May Present (Symptoms)

Symptoms can vary depending on the type and severity of injury, but may include:

• Pain around or within the knee joint
  • Swelling or inflammation
  • Reduced range of motion
  • Difficulty walking, running, or bending the knee
  • A feeling of instability or the knee “giving way.”
  • Locking, catching, or clicking sensations
  • Tenderness around the joint

Diagnosing a Knee Injury

Diagnosis typically includes:

History and Physical Examination
Your clinician will assess symptoms, how the injury occurred, knee stability, and movement patterns.

Imaging
• X-rays to evaluate bones and rule out fractures
• MRI to assess ligaments, cartilage, and soft tissue injuries
• Ultrasound in some cases to evaluate soft tissue structures

Treatment Options

Non-Surgical (Conservative) Treatment
Many knee injuries respond well to:

• Activity modification and relative rest
  • Ice and swelling management
  • Rehabilitation exercises to improve strength and stability
  • Physiotherapy focusing on movement control and mechanics
  • Gradual return to activity

Surgical Treatment
Surgery may be recommended if:

• There are severe ligament tears (such as ACL injuries)
  • Cartilage or meniscus damage is significant
  • Knee instability persists despite rehabilitation

Post-surgical rehabilitation is important to restore strength, mobility, and joint function.

Protecting Your Knees Long Term

To reduce injury risk:

• Strengthen the muscles around the hips and knees
  • Warm up before sport or exercise
  • Improve balance and movement control
  • Increase training intensity gradually
  • Address knee pain early before it worsens

When to Seek Professional Help

If you experience persistent knee pain, swelling, instability, or difficulty moving the joint, early assessment can help prevent further damage and support a faster recovery.

📞 Call us at (02) 9817 2005 or Book Online to schedule an appointment and get expert help today.