ACL injuries in football

ACL Injuries in Football: What You Need to Know — and How to Get Back on the Pitch

An ACL injury is one of the most feared diagnoses in football. The crack, the instant instability, the sinking feeling — and then the long road ahead. But here’s what we know: with the right rehab, most players return to the game they love. This article covers everything you need to understand about ACL injuries — what causes them, what recovery looks like, and what it takes to get back on the pitch safely.

What Is the ACL — and Why Does It Matter?

The anterior cruciate ligament (ACL) is a band of connective tissue that connects your tibia (shin bone) to your femur (thigh bone) inside the knee. It does two critical jobs.

Mechanical stability: it stops your tibia from sliding forward on your femur and controls rotational forces through the knee.

Sensory signalling: the ACL is densely packed with nerve receptors that act as a data centre for your brain, relaying real-time information about your knee’s position, tension, and movement as you run, jump, twist, and change direction.

When the ACL is damaged, you lose both. The knee feels unstable. Your brain loses the fine-grained feedback it relies on to coordinate movement. That’s why ACL rehab isn’t just about rebuilding strength — it’s about retraining the whole neuromuscular system.

How Do ACL Injuries Happen in Football?

Not how you might think. A landmark 2020 study published in the British Journal of Sports Medicine examined 134 ACL injuries in elite football players and found:

• 44% were non-contact injuries
• 44% were indirect contact injuries
• Only 12% involved direct contact to the knee

That’s 88% of injuries with no direct blow to the knee. So what’s actually causing them?

The mechanics of injury

The most common triggers were:

• Pressing (47%): the high-intensity movement to win the ball from an opponent
• Being tackled (20%): defensive body contact while in possession
• Kicking and balance (16%): maintaining stability during or after a strike
• Landing from a jump (7%): particularly on one leg with rotational forces

A key finding was mechanical perturbation — when a player’s upper body is bumped or pulled while their lower body is planted on the ground, the resulting twisting force through the knee dramatically increases ACL injury risk. Pressing, tackling, and defensive actions are all high-risk moments, not because players are colliding knee-to-knee, but because of the aggressive whole-body movement interactions involved.

The high-risk position: dynamic knee valgus

The most common mechanism of injury is dynamic knee valgus — where the knee collapses inward as the hip rotates internally and the foot is planted. This position places enormous stress on the ACL. It’s most likely to occur during deceleration, landing, or a rapid change of direction. It can also happen subtly during pressing and tackling when the player is off-balance.

Identifying and correcting this movement pattern is a cornerstone of both ACL rehab and injury prevention.

Timing: when in the match do injuries happen?

The same 2020 BJSM study found that 25% of all ACL injuries occurred in the first 15 minutes of the match — before fatigue can be blamed. This matters because it shifts the conversation away from ‘the player was tired’ and towards readiness: how prepared is the neuromuscular system at kick-off?

Proper warm-up, cognitive readiness, and pre-match activation are not optional extras. They are injury prevention.

A Note on Female Athletes

Example of dynamic valgus load on knee.

Female footballers face a significantly higher risk of ACL injury than their male counterparts — estimates range from two to eight times higher, depending on the sport and study. Contributing factors include differences in hormonal fluctuation across the menstrual cycle, biomechanical differences in landing patterns, and neuromuscular control. At Vitality Physiotherapy, our team has specific expertise in female athlete ACL rehab and prevention — something we factor into every programme we design.

Is an ACL Tear Career-Ending?

“Be patient, don’t cut corners, and do everything the Physio tells you.” — Alan Shearer CBE

No. And there’s compelling evidence to back that up.

A widely cited study reported that 83% of athletes return to professional sport following ACL reconstruction. The key variable isn’t the injury itself — it’s the quality of the rehabilitation.

Consider Alan Shearer. On Boxing Day 1992, playing for Blackburn Rovers against Leeds United, he ruptured his ACL in the first half — and didn’t realise it. He went on to score twice in a 3-1 win. After surgery and a structured rehab programme, he returned the following season to score 31 goals in 40 games. He credits that return to one principle: do the work, follow your physio, don’t rush it.

The players who struggle to return are, more often than not, those who return too soon — before their knee is truly ready.

How Long Does ACL Rehab Take?

The standard timeframe is 9 months — but this is a minimum, not a target. Virgil van Dijk returned at 9 months after his 2020 injury. Others take 12–18 months to reach full competitive fitness. The timeline depends on:

• Whether you had surgery or are managing conservatively
• The extent of any associated injuries (meniscus, other ligaments)
• Your pre-injury fitness level
• How consistently and intelligently you complete your rehab
• Your neuromuscular readiness — not just structural healing

The research is clear: returning at 9 months carries a significantly lower re-injury risk than returning at 6 months. Every week of quality rehab reduces that risk. There is no shortcut that doesn’t cost you later.

What Does ‘Ready to Return’ Actually Mean?

Return to football infographic by Vitality Physiotherapy

Return-to-play is not a date on a calendar. It’s a decision made by a team — athlete, physiotherapist, surgeon, coach, and sometimes a sports psychologist — using objective data. Here’s what that looks like in practice.

The athlete

Do you trust your knee? Can you commit to a tackle, a sprint, a jump — without hesitation or fear? Psychological readiness is not a nice-to-have. Fear of re-injury is one of the strongest predictors of not returning to pre-injury performance levels. Your inner voice matters as much as your single-leg hop score.

The physiotherapist

Your physio needs to see objective evidence of readiness across multiple domains:

• Strength and power: can you achieve 90%+ limb symmetry on strength testing?
• Hop testing battery: single leg vertical hop, forward hop, timed 6m hop, triple hop, triple crossover hop, lateral hop, medial hop, and their rotational variants. This isn’t an arbitrary list — each test assesses a different demand of football movement.
• Neuromuscular control: reaction times, adaptability under fatigue, dynamic balance
• Movement quality: can you decelerate, change direction, and land without compensating?

The surgeon

Structural integrity matters. Your surgeon will assess graft healing, range of movement, and whether the reconstructed ACL has the mechanical properties required for full sport. A happy surgeon means a structurally sound knee — but structural soundness alone is not clearance to play.

The coach

Pitch-based performance has to match the test results. Can you accelerate and decelerate at full speed? Change direction under pressure? Jump and land when required? React to a ball coming at you unpredictably? Return to training is the bridge between rehab and competition — it shouldn’t be skipped.

The role of cognitive training

A 2021 study found that cognitive skills, reaction time, and processing speed are significant factors in preventing ACL re-injury. This is why progressive, evidence-based ACL rehab includes reactive drills — small-sided games, decision-making under pressure, gates games, possession exercises. The nervous system needs to be retrained, not just the muscles.

Physical fitness without cognitive and neuromuscular readiness is a re-injury waiting to happen.

The Final Whistle

An ACL tear is not relegation. It is a significant injury — but it is one that, with the right support and the right approach, most players recover from fully.

The players who come back stronger are the ones who take the rehab seriously, trust the process, and resist the temptation to rush. There are no shortcuts — but there is a clear path.

At Vitality Physiotherapy, we have the clinical experience, the protocols, and the team to take you from injury to full return to football — whether you’re playing Sunday league or semi-professionally. We work across our Southwark (SE1) and Esher (KT10) clinics, and we’d love to support your recovery.

Want to talk through your injury? Book a free 15-minute call with one of our ACL specialists — from the convenience of home.

Call us: 020 7193 9928

Email: info@vitality-physio.co.uk

References

Della Villa F et al. (2020). Football ACL injuries reloaded. British Journal of Sports Medicine Blog.

Ardern CL et al. (2018). Return to sport following ACL reconstruction. British Journal of Sports Medicine.

Grooms D et al. (2021). Cognitive and neurological contributors to ACL re-injury. Journal of Orthopaedic & Sports Physical Therapy.

ACL injuries

 

We've all come across a friend or famous athlete who has had their season cut short through an ill-timed knee twist and alongside the dreaded "popping" sound. When this happens, it can be daunting.  

Understanding ACL injury and knowing what steps to take to recover will help you get back to the sport you love sooner. As mentioned in our ACL tear article, the ACL is one of the main ligaments controlling the stability of your knee, and injuries to the ACL occur more frequently in sports involving landing and pivoting actions like football, netball, or skiing.   

Diagnosis of ACL Injuries 

 The Lachman Test 

John Lachman (1919-2007) was an orthopaedic surgeon at Temple University in Philadelphia who invented the technique. It's considered the most reliable way to diagnose an ACL injury. It is used by Physios and Surgeons the world over.  

How is the Lachman test performed? 

The Lachman test is performed like this: 

1. Lie flat on your back. Relaxed, with legs straight. 
2. Your Physio places your knee in a slightly bent (and sometimes rotated) position. 
3. One hand is on the back of your lower leg (just under your knee joint), and the other is on the front of your thigh. 
4. They then pull your shin forwards firmly while stabilising your thigh.

 Why do we do the Lachman test?  

 To measure the endpoint and joint laxity.  

The endpoint is where the end of the joint movement is felt as the shin is pulled forward. If this endpoint feels further away than what's expected, then this may indicate an injured ACL.  

 Joint laxity is the general feel of your joint movement and the sense of how lax (or loose) your ACL feels compared to your other knee.  

 

Grading ACL tears with the Lachman test: 

• Normal. There's no difference in movement or laxity between your left and right knees. 
• Mild (grade 1). There's slightly more (about 2-5mm) movement than in your other knee. 
• Moderate (grade 2). There's moderately more (about 5 to 10 mm) movement than in your other knee. 
• Severe (grade 3). There's much more (10 to 15 mm) movement than in your other knee. 

 

Because we're all different and have varying baselines of "stiffness", the test should be done on your other leg too. This will give the Physio an accurate idea of what's typical for your joint.  

Anatomy of the L knee showing a ruptured ACL

The Pivot Shift test 

How is the pivot shift test performed? 

 1. Lie flat on your back. Relaxed, with legs straight.  

2. The Physio places one hand on your heel and the other just below the outer side of your knee.  

3. They apply pressure to the outside of your knee while internally rotating your lower leg and bending and straightening your knee. 

 The test is positive if your lower leg sinks backward when the knee is bent at 30-40 degrees. Sometimes a 'clunk' can be heard when this happens. 

 

Treatment options for ACL tears 

 There are two treatment options for an ACL injury: Conservative or surgical management.  

 Your age, previous injury, and fitness and rehab goals should be considered when deciding the best route to follow.  

  

Conservative management 

Conservative or non-surgical management involves a period of Physiotherapy treatment to restore your knee function to pre-injury level.  

 Surgical management 

Having ACL surgery usually requires a minimum of 9 months of rehab tailored towards getting you back into your sport.  This may sound like a long time, but returning to sport too early can have negative implications. Mainly increasing your risk of re-injury.  

 

ACL Surgery  

What surgery is there for ACL tears, and what you can expect? 

 The most common type of ACL surgery is a reconstruction of a new tendon called a graft.  This is typically a minimally invasive procedure done via keyhole surgery using an arthroscope (a small camera through which your surgeon passes tiny surgical instruments).  First, the damaged ACL is removed, and then the graft is attached in its place. There are different types of grafts. They include:   

• Autografts - Formed from tissues taken from another part of your body (like tendon tissue strands from your hamstring or patella tendon)  
• Allograft - Formed from tissues taken from another person's body 
• Synthetic - Formed from an artificial source or donor. 

 Rehab is paramount to your ACL recovery (with or without surgery) . Without rehab, ACL surgery is meaningless. All the top knee surgeons agree.  Your ACL rehab determines the success of your recovery. We recommend an evidence-based programme that's divided into four progressive phases. In our experience, this process takes 9 to 18 months to complete.  

Phase 1: Restore knee extension and reduce swelling  

Immediately after sustaining your injury or after your surgery, the muscles around your knee may feel weak, and your joint may be swollen and painful. In addition, you may not be able to completely straighten your knee.  During this stage of your recovery, the aim is to reduce swelling and pain and get your knee completely straight again. This phase typically takes 2-3 weeks.  

  

Phase 2: Strength & Neuromuscular control  

 After you've passed the criteria to move onto phase 2, the fun stuff begins!  You'll introduce a new set of exercises, including squats, lunges, leg presses, and more. These will continue throughout your rehab programme, becoming more complex as you advance through the various stages. 

  

Phase 3: Plyometrics 

After passing all the phase 2 criteria, you can ramp up the fun a little more and start introducing hopping, jumping, landing, and running movements.  These sport-specific functional activities need to be retrained for your to safely return to your sport.  

  

Phase 4: Return to Sport  

Until this moment you have been working towards Phase 1-3.  Before you get back to your sport, you and your Physiotherapist should discuss how and plan how you will do it.  

  

General guidelines for ACL rehab 

• Follow each phase-specific exercise and test and only move on to the next phase once you have mastered the current one. 
• You need to achieve your rehab goals in the correct order to ensure you fully recover. 
• If you stop or skip steps in your rehab, you can worsen your current injury or increase your chances of re-injury when you eventually return to your sport.   

 

Conclusion 

Now that you know how to get a diagnosis, choose the proper treatment, and understand the rehab process better, you can move on from your ACL injury in the right direction. Yes, the rehabilitation process is long and requires dedication and patience. But, with the right team supporting you, your progress can be smoother, and it can be a whole lot more fun! 

 

Our highly experienced and knowledgeable Physiotherapists can get you where you want to be. So, call us now and put your ACL recovery planning in our hands! 

Knee Pain

Knee pain is common. For some, the simple activities of daily living such as walking or climbing stairs can become cumbersome when your knee hurts. For others a niggle in the knee can deteriorate and adversely affect sporting performance. There are many causes of knee pain, so it is important for you to know what is causing the pain. There are however some common themes that occur with most types of knee pain.

Why does my knee hurt?

The knee is comprised of many structures including ligaments (connects bones together) tendons (attach muscles to bone) and cartilage (the connective tissue between bones). Most injuries in this area are caused by multiple problems over a long period of time- this could include muscular weakness, overuse, direct trauma or even lifestyle factors.  

Most patients say that when their knee hurts, they tend to want to do less activity as more activity requires bearing extra load through the knees.  Otherwise simple activities such as climbing the stairs or even going on a run can feel scary.  Often, it leads to us searching for answers by having x-rays or scans.  Sometimes a scan can look really scary, and sometimes we are told that we have “bone rubbing on bone” or our cartilage has “completely gone”. This can increase fear and further reduce activity and weight bearing through the knee. 

However, just like we all get wrinkles or grey hair, age related chages to our knees are inevitable. Researchers now believe that inactivity is a major contributor to age-related diseases and disabilities, and that regular exercise can reduce or reverse those risks.

What should I do if I have knee pain?  

Most knee pain can be treated through a graded rehab programme. Typically, this consists of a combination of strength training, education and a good understanding of how to implement your programme.  It is important to have a supervised programme so that you know exactly where to start and know exactly how you are going to progress over the course of the rehab programme.  

When we strengthen the muscle around our knees we increase our knee’s ability to withstand the load that we tend to put on them on a daily basis.

FUN FACT:  Forces transmitted across the knee joint during normal walking range between 2 and 3 times body weight!

This makes them much less likely to experience pain in the future. Over recent times we have seen a huge body of evidence to suggest that an 8-12 week exercise programme can significantly reduce knee pain and symptom progression.  

What Should I Do Now?  

• Seek out advice from a healthcare professional who understands knee pain and is up to date with the current research.
• As mentioned before, scans are not always needed, and scans often do not correlate with the pain you are experiencing. 
• Begin strength training with the supervision of a healthcare professional.  
• Other factors to consider are sleep, diet and body weight- all of which can contribute to pain and pain sensitivity.  

 Here are some great simple knee exercises to try at home: