
ACL Tear
An ACL tear is a common knee injury involving the anterior cruciate ligament, which helps stabilize the knee joint. It often occurs during sports that involve sudden stops, jumps, or changes in direction.
Quick Facts
- One of the most common sports knee injuries
- Often occurs during pivoting or sudden movement
- May require surgery depending on severity
- Can affect knee stability long-term
- Rehabilitation is key to recovery
Symptoms
Common symptoms include:
- A popping sound at the time of injury
- Knee pain and swelling
- Instability or “giving out” of the knee
ACL injuries are often confused with meniscus tears or other ligament injuries.
Causes
ACL tears typically occur due to:
- Sudden stops or changes in direction
- Jumping and landing improperly
- Direct impact to the knee
Risk Factors
You may be at higher risk if you:
- Play sports like soccer, basketball, or football
- Have poor landing mechanics
- Have previous knee injuries
Treatments
Treatment depends on activity level and severity.
Some patients can manage with physical therapy and bracing. Active individuals, especially athletes, often undergo surgical reconstruction followed by structured rehabilitation.
Recovery timeline for ACL tears
- Non-surgical rehab: ~3–6 months
- Surgical reconstruction: ~6–9 months for daily activity
- Return to sports: often ~9–12 months depending on strength and stability
When to Seek Care
Seek medical care if you experience knee instability, swelling, or difficulty bearing weight. Specialists, such as sports medicine specialists, orthopedic surgeons, and physical therapists, may be referred to assist.


