ACL Injuries: What You Need to Know

Whether you heard a pop on the field, felt your knee give way on a landing, or you've just come out of an MRI with a diagnosis in hand, you're in the right place. ACL injuries are one of the most significant sporting injuries you can face, but with the right management and the right team, the vast majority of people get back to doing what they love.

At Active Balance, ACL rehabilitation is something we're deeply passionate about and have pursued well beyond standard training. We've invested in the knowledge, the equipment, and the systems to manage ACL injuries at a high level, and we're here to walk you through every step of the process.

How Common Are ACL Tears?

More common than most people realise. Around 15,000 ACL reconstructions are performed in Australia every year — and that figure doesn't include the growing number managed conservatively without surgery.



ACL tears occur across all ages and activity levels, but rates are highest in sports involving cutting, pivoting, and jumping. Netball, AFL, basketball, and soccer carry the highest incidence in Australia. Female athletes are at significantly higher risk than male athletes — research suggests two to eight times higher depending on the sport — due to a combination of anatomical, hormonal, and biomechanical factors.

Will I Need Surgery?

Not necessarily.

This is one of the first and most important conversations to have after an ACL tear diagnosis.



There are two legitimate pathways for managing an ACL tear: surgical reconstruction and conservative (non-surgical) management. Both are valid. Both require serious, long-term rehabilitation. The right choice depends on your age, your sport, your activity goals, the nature of the injury, and your personal preferences after a thorough discussion with your medical team.

The Most Important Thing to Understand

Surgery  (if you have it) does not fix your knee. It replaces the ligament. That's an important distinction.

The graft that replaces your ACL needs to be trained, loaded, and progressively challenged over many months before it functions like a native ligament. In the meantime, the muscles, balance systems, and movement patterns around the knee need to be rebuilt from the ground up. Without that rehabilitation, the graft is significantly more likely to fail, and you're significantly more likely to reinjure.



This applies equally to the non-surgical pathway. Conservative management relies on the muscles and surrounding structures to compensate for the absent ligament, which they absolutely can do, but only with intensive and sustained rehabilitation.

The rehab is what determines your outcome. Not the surgery.

How Long Does Recovery Take?

9 to 12 months minimum, regardless of pathway. This isn't a conservative estimate, it's where the evidence consistently sits for safe return to sport.

The 9-month minimum is driven by two things: the biology of graft maturation (the graft actually gets weaker before it gets stronger, reaching its lowest point around 6–8 weeks post-op), and the time genuinely needed to rebuild the strength, neuromuscular control, and movement quality required for sport. Athletes who return before 9 months, or before reaching objective strength benchmarks, reinjure at significantly higher rates.

We know that's a long time. We also know it's the right call,and we build our entire program around making those months as productive, supported, and clearly progressed as possible.

Not Sure Where to Start?

An ACL diagnosis can feel overwhelming, and the decisions that follow aren't always straightforward. Surgery or no surgery? Which surgeon? What does rehab actually involve? How long will it take?

You don't need to have any of those answers before you come and see us.

One of the most valuable things we do is sit down with you early, before those decisions are made, and help you understand what you're actually dealing with, what your options are, and what the road ahead looks like for your specific situation. We'll look at your scan, talk through your sport, your goals, and your lifestyle, and give you an honest picture of both pathways so you can make an informed decision alongside your medical team.

We also work closely with a number of Adelaide's orthopaedic surgeons and sports medicine doctors, so if you need a referral or a second opinion, we can point you in the right direction.



There's no obligation and no pressure, just clarity at a time when you probably need it most.

Frequently Asked Questions

How do I know if I've done my ACL? The classic presentation is a non-contact injury during a change of direction or landing, often with a pop, followed by rapid swelling within a few hours. The knee may feel unstable or like it gives way during dynamic movement. That said, the only way to confirm an ACL tear is through clinical assessment and MRI. If you suspect you've injured your ACL, particularly if the knee swelled after an incident and hasn't felt right since, it's best to get it assessed promptly. For those considering conservative management, early intervention matters significantly.

How common are ACL tears? Very common in Australian sport. Around 15,000 ACL reconstructions are performed each year in Australia, with netball, AFL, basketball, and soccer carrying the highest rates. Female athletes are at significantly higher risk, though the injury affects athletes of all ages, genders, and levels.

Do I need surgery? Not necessarily. Both surgical and non-surgical management are legitimate pathways, both require serious, long-term rehabilitation. The right choice depends on your age, sport, activity goals, and the nature of the injury. We work with you and your medical team to make sure you understand both options fully before anything is decided.