ACL Injuries

Introduction

Anterior cruciate ligaments (ACL) injuries are some of the most well-known knee injuries due to the complexity and challenge, even more so for athletes and active individuals. The ACL is one of the key ligaments that stabilises the knee through rotation and forward movements of the shin. When it is torn or damaged, it can affect significantly mobility, confidence and participation in sport or daily activities.

Damaging the ACL happens during high-speed changed in direcation, landing awkwardly from and jump or hight, or sudden deceleration. Beyond physical injury, an ACL injury can also take an emotional toll, leading to frustration, fear of re-injury and uncertainty about returning to sport. Alongside the emotional toll it can affect social life as well, not being able to join in activities that you might have done before.

At Progress Physiotherapy, we take a holistic approach to ACL rehabilitation. We recognise the enormous impact these injuries can have not just on the body, but also on the mind and lifestyle. Our therapists support patients through every stage of recovery, addressing the physical, psychological, and social factors that influence healing and long-term success. 

In this post, we’ll explore what causes ACL injuries, how to manage them, when to seek treatment, and common myths that often surround this type of injury.

What Causes ACL Injuries?

The ACL is one of the major stabilising ligaments in the knee. When it tears or is damaged, the knee may feel unstable, painful, or unable to support sudden movement.

Common Causes:

• Sudden change of direction: Quick pivoting, cutting, or side-stepping movements in sports like football, netball, rugby, or basketball. 

• Incorrect landing mechanics: Landing with knees caving inward (valgus) or with poor hip control. 

• Deceleration: Stopping suddenly from high speed. 

• Direct impact: Although less common, a collision (such as in rugby) can also cause a tear. 

Risk Factors: 

• Poor hip and glute strength 

• Fatigue or reduced neuromuscular control 

• Previous knee injury 

• Wearing inappropriate footwear on certain surfaces 

• Biomechanical factors such as knee valgus or flat feet 

Typical Symptoms Include: 

• A popping sensation at the time of injury 

• Swelling within hours 

• Instability or giving-way 

• Difficulty bearing weight 

• Loss of range of motion 

At Progress Physiotherapy, we conduct a detailed movement and strength assessment to identify what level the injury. This allows us to create a personalised rehabilitation plan that not only rebuilds strength but also corrects any movement patterns or lifestyle factors that may have increased injury risk. 

How Can I Relieve or Manage an ACL Injury? 

Immediate care is important, followed by structured rehabilitation to restore knee function and stability. 

Initial Management (First 48–72 hours): 

• Rest: Continue with movements that do not lead to pain. 

• Ice: 15–20 minutes, for the first 24-48 hours. 

• Compression: Helps control swelling. 

• Elevation: Reduces inflammation. 

This early phase aims to manage pain and swelling without compromising the healing process. 

Rehabilitation and Long-Term Recovery 

ACL rehabilitation is a long journey, typically lasting 9–12 months, depending on whether surgery is required or not and what activity level the individual aims to return to. 

Non-Surgical vs Surgical Management 

Not all ACL injuries require surgery. Some people — especially those who aren’t involved in cutting or pivoting sports — can regain full function through physiotherapy alone. 

However, surgery may be recommended if: 

• You want to return to high-demand sports 

• The knee feels unstable in daily life 

• There is significant associated damage (e.g., meniscus tear) 

At Progress Physiotherapy, we guide patients through both pathways and help them make informed decisions about their care. 

Physiotherapy Treatment: A Phase-Based Approach 

Phase 1: Pain and Swelling Reduction 

• Gentle mobility exercises 

• Return knee to full extension 

• Quadriceps activation drills 

• Reduction of swelling  

Phase 2: Strength and Neuromuscular control 

• Progressive strengthening: quadriceps, hamstrings, glutes 

• Balance and proprioception training 

• Core and hip stability exercises 

Phase 3: Running, Agility and Landing  

• Regain full strength and balance 

• Plyometrics 

• Agility drills 

Phase 4: Return to Sport Conditioning 

• Sport-specific drills 

• Cutting, pivoting, and jumping techniques 

• Psychological readiness assessments 

• Functional strength tests 

At Progress Physiotherapy, our therapists design rehabilitation plans tailored to your sport, lifestyle, and goals. We incorporate not only physical training but also psychological support, helping patients overcome fear of movement, anxiety about re-injury, and the mental barriers that commonly occur during long-term ACL rehab. 

We also address social factors — such as returning to work, managing training loads, and dealing with lifestyle changes during recovery. 

When Should I See a Physiotherapist?

Seek assessment if: 

• You felt a pop during injury 

• The knee swells immediately or significantly 

• It feels unstable or gives way 

• Walking is difficult 

• You cannot straighten your knee 

• Pain persists beyond a few days 

Early assessment allows quicker diagnosis and a more effective rehabilitation plan. 

At Progress Physiotherapy, we coordinate with local GPs, and surgeons and we can refer for image if needed. This full-circle approach ensures that every aspect of your recovery is supported. 

Common Myths About ACL Injuries 

Myth 1: An ACL tear means the end of your sports career. Not true. Many individuals return to their pre-injury level — some even stronger — with proper rehabilitation. 

Myth 2: Surgery guarantees a full recovery. Surgery alone isn’t enough. The rehab process is just as important, if not more so. 

Myth 3: You should avoid using your knee after an ACL injury. Complete rest leads to muscle wasting and delayed recovery. Safe, guided movement is crucial. 

Myth 4: Only athletes tear their ACL. Anyone can — even people stepping awkwardly off a curb or twisting during daily activities. 

At Progress Physiotherapy, we help patients separate fact from fiction to reduce fear, build confidence, and promote informed decision-making. 

Conclusion 

ACL injuries can be life-changing, but with proper management and care, recovery is absolutely achievable. With the proper education about ACL injury, following a progressive rehabilitation plan, and addressing the physical and psychological challenges are essential for returning to full strength. 

At Progress Physiotherapy, our team uses a holistic rehabilitation model, integrating hands-on treatment, strength training, movement retraining, education, and emotional support. We guide you through every step — from early pain management to full return-to-sport conditioning — ensuring you feel confident, supported, and empowered throughout your journey. 

If an ACL injury is impacting your life, reach out to our experienced therapists. Together, we’ll build a personalised plan that restores your strength, stability, and confidence — helping you return to the activities you love. 

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