How Long Does it Take to Recover From Anterior Cruciate Ligament Injury (ACL)?


Anterior Cruciate Ligament (ACL) injuries are common among athletes and physically active individuals, often requiring extensive treatment and rehabilitation. Recovery from an ACL injury is a multifaceted process that varies depending on the individual and the severity of the injury. This article will provide an overview of the ACL injury recovery process.

What are the Signs an ACL is Damaged?

The signs of an ACL injury can vary but typically include:

  • Sudden and severe pain: Many people report a “popping” sensation in the knee at the time of injury.
  • Swelling: This often develops within a few hours following the injury.
  • Loss of range of motion: Your knee may not bend or straighten fully.
  • Instability: The knee may give way or feel unstable during weight-bearing activities.

Can You Walk with a Torn ACL Ligament?

The ability to walk after an ACL injury can vary significantly. Some individuals may be able to walk, although often with pain and a limp. However, instability and discomfort may increase with more demanding activities such as running, jumping, or twisting movements. It’s important to note that walking on a torn ACL may increase the risk of further damage to the knee.

Does an ACL Ever Fully Heal?

The ACL does not typically heal on its own due to poor blood supply to this area. Consequently, complete ACL tears often require surgical intervention, especially in athletes and active individuals. After surgical reconstruction, the healing process is often long and involves a comprehensive rehabilitation programme.

“While the ACL does not typically heal on its own, successful surgical reconstruction followed by a proper rehabilitation programme can often restore significant function and stability to the knee.” – The American Academy of Orthopaedic Surgeons

What Happens If an ACL is Left Untreated?

If left untreated, an ACL injury can lead to chronic knee instability. This can increase the risk of other knee injuries, including damage to the cartilage and other ligaments in the knee. Over time, this can potentially lead to early onset arthritis.

How Long Does It Take to Recover from an ACL Injury?

Recovery from an ACL injury depends on several factors including the severity of the injury, whether surgery is required, and the specific demands of the individual’s activities or sports.

Generally, it can take six to nine months to return to full activity levels after ACL reconstruction surgery. This includes:

  1. Initial Recovery: The first few weeks after surgery focus on reducing swelling, regaining range of motion, and gradual weight-bearing.
  2. Rehabilitation: A physiotherapy programme aims to restore strength, stability, and function over several months.
  3. Return to Sport: Gradual return to sport-specific training usually begins around six months, with full return often around nine months or longer, depending on the individual’s progress and the specific demands of the sport.


ACL injuries can be a significant setback for athletes and active individuals. Recognising the signs of an ACL injury, seeking prompt medical advice, and committing to a comprehensive rehabilitation programme are crucial for optimal recovery. Although the ACL does not heal on its own, modern surgical techniques and effective rehabilitation can often restore significant function and stability to the knee, enabling individuals to return to their previous levels of activity.

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