What Happens If You Don’t Get Surgery on Your ACL?

An ACL tear does not always mean automatic surgery. Some people return to everyday life, work, and even sport with a strong, stable knee after structured rehabilitation, as described on our ACL Injury page. Others continue to experience instability and may need reconstructive surgery, outlined in our ACL Reconstruction Overview. This FAQ explains what happens if you don’t get surgery on your ACL, how non-surgical management works, and when your physiotherapist may recommend an orthopaedic review.

Short Answer: What Happens If You Don’t Get Surgery on Your ACL?

If you do not have surgery, your ACL injury is usually managed with a structured, progressive rehabilitation program. Many people regain good function through physiotherapy and return to everyday activities without ongoing knee giving way. Others may notice instability during twisting or pivoting, which can increase the risk of further joint irritation or a meniscus injury. This may prompt a discussion about reconstruction. For full details, visit the ACL Injury page.

What If You Don’t Get ACL Surgery?

Most people who choose a non-surgical pathway complete at least a three-month rehabilitation trial. During this time, your physiotherapist focuses on swelling reduction, strength, balance, and movement control. If your knee feels stable and functional testing looks sound, you may continue with non-surgical care. If the knee keeps giving way, surgery may be discussed. You can also review how other knee ligaments support stability when the ACL is injured.

Some recent research trials suggest that a rehabilitation-first approach can produce similar outcomes to early reconstruction in selected patients. A large randomised trial published in The Lancet compared early ACL surgery with a structured exercise program followed by optional surgery.

How Non-Surgical ACL Rehabilitation Works

Non-surgical ACL management follows progressive phases. Early goals focus on reducing swelling, restoring quadriceps and hamstring strength, and normalising your walking pattern. As control improves, your physiotherapist introduces more demanding strength and neuromuscular exercises, such as single-leg balance, step work, and movement retraining.

Later stages may include running preparation, straight-line running, agility drills, and gradual return to cutting and jumping tasks. Throughout this process, your physiotherapist monitors knee stability and symptoms to judge whether your knee is coping without reconstruction.

When Is ACL Surgery More Likely?

Surgery is more likely when the knee remains unstable despite careful rehabilitation. Signs include frequent giving way, difficulty trusting the knee on stairs or uneven ground, or instability during sport drills. People aiming to return to Level I pivoting sports, such as football, netball, or basketball, may also be advised to consider reconstruction. Guidance on return-to-sport readiness is outlined in our ACL Rehabilitation After Surgery page.

How Do You Decide What Is Right for You?

Choosing between surgery and non-surgical care depends on your goals, knee stability, general health, and commitment to rehabilitation. A physiotherapist-led assessment helps clarify how your knee is functioning now and what may be realistic in the future. Strength testing, balance assessment, movement analysis, and a review of your work and sport demands guide your options. For general knee assessment information, see Physiotherapy for Knee Pain.

Related Information

• ACL Injury: Causes, Symptoms & Treatment
• Challenges of Living with an ACL Injury
• ACL Rehabilitation After Surgery
• ACL Surgery vs Exercise-Based Management
• Physiotherapy for Knee Pain

References

For research summaries, treatment guidance, and rehabilitation pathways, please visit our main condition page:

ACL Injury — Causes, Symptoms, Treatment & Rehabilitation