Understanding Sex Differences in ACL Rehabilitation: What Female Athletes Need to Know

Editor – Carolyn Kent Women’s Football Hub

Anterior cruciate ligament (ACL) injuries are one of the most challenging setbacks an athlete can face physically, mentally, and emotionally. While much of the conversation in recent years has focused on why female athletes are more likely to suffer ACL injuries, there is a growing need to shift the conversation toward what happens after surgery.

In a recent episode of Women’s Football Hub, Dr. Anne Leung shares insights from her PhD research exploring sex differences in outcomes following ACL reconstruction. The conversation highlights a critical point: rehabilitation is not a one-size-fits-all process and sex differences matter.

The Reality of ACL Rehabilitation

ACL rehab is long, demanding, and often underestimated. As Dr. Leung explains, one of the most powerful tools for athletes is simply understanding what lies ahead.

For female athletes in particular, research shows that recovery can present additional challenges. Being aware of these differences isn’t about lowering expectations it’s about setting realistic ones and preparing accordingly.

Where Do Female Athletes Struggle Most?

Several consistent themes emerge in the research:

1. Quadriceps Strength Deficits

One of the most important findings is that female athletes consistently demonstrate lower quadriceps strength after ACL reconstruction compared to males.

These differences appear:

As early as 4–6 months post-surgery
Persist at 12 months, 2 years, and even long-term

Quadriceps strength is not just another metric it is strongly linked to:

Functional performance
Return-to-sport readiness
Re-injury risk

In short: if strength doesn’t recover, outcomes don’t improve.

2. Lower Return-to-Sport Rates

Female athletes are less likely to return to sport, particularly at their previous level of competition.

This is not just about performance it has broader consequences. Reduced return to sport is linked to:

Lower overall physical activity
Potential long-term health risks
Reduced joint health over time

3. Decreased Physical Activity Long-Term

Perhaps one of the most concerning findings is that female athletes are significantly less active one to two years after surgery.

This highlights a key issue:
ACL rehab doesn’t just end at return to sport it influences lifelong health behaviours.

When Do These Differences Start?

Interestingly, the differences are not always present early on.

At around 3 months post-op, males and females report similar outcomes
But as rehab progresses, a divergence occurs, with females reporting lower function and performance

This “turning point” in rehab is still not fully understood and represents an important area for future research.

The Role of Psychology

Physical recovery is only part of the picture.

Fear of re-injury is a major barrier for all athletes, but the way it presents may differ:

Female athletes tend to fear re-injury during daily activities
Male athletes tend to focus on sport-specific scenarios

There is also evidence suggesting that female athletes may have:

Lower psychological readiness to return to sport
Different confidence patterns

Interestingly, both too much and too little confidence can increase injury risk highlighting the need for balance.

Do Hormones Play a Role?

Hormones are often a hot topic particularly on social media.

However, current evidence does not support the idea that athletes should train differently during different phases of the menstrual cycle.

Instead:

Training should remain consistent
Individual symptoms can be managed as needed

While there may be biological differences (such as inflammation markers), this area remains under-researched in ACL populations.

Are Female Athletes Treated Differently?

An emerging area of research suggests that bias may exist in rehabilitation environments.

Some studies indicate that clinicians may:

Progress male athletes faster than females
Prescribe exercises differently based on gender

While this evidence is still developing, it raises an important question:
Are outcomes shaped not just by biology but by the environment and expectations around the athlete?

The Importance of Training History

One of the most overlooked factors is training background.

Female athletes often have:

Less exposure to strength training at younger ages
Lower “training age” compared to male counterparts

This matters because rehab is not just about recovery it can also act as a “reset button”, offering an opportunity to build foundational strength and skills that may have been missed earlier.

Late-Stage Rehab: The Hidden Challenge

Many athletes assume the hardest part of rehab is early recovery but the reality is that late-stage rehab can be even more difficult.

At this stage:

Progress often slows
Motivation can drop
Strength deficits may still persist

For female athletes, these challenges are compounded by the persistence of quadriceps weakness and difficulty meeting return-to-sport benchmarks.

What Needs to Change?

So what can clinicians and athletes do?

1. Prioritise Strength – Especially Quads

Strength should be monitored, measured, and progressed consistently.

2. Individualise Rehab

Every athlete is different but treatment should still be informed by known sex-based trends.

3. Address Psychological Factors

Confidence, fear, and readiness should be part of rehab not an afterthought.

4. Use Rehab as an Opportunity

ACL rehab is not just recovery it’s a chance to build better, more resilient athletes.

Final Thoughts

The key takeaway is clear:
Female athletes are not just “smaller versions” of male athletes.

They may face:

Different physical challenges
Different psychological barriers
Different environmental influences

Recognising and addressing these differences is essential if we want to improve outcomes not just for return to sport, but for long-term health and wellbeing.

This blog was created from the podcast with the assistance of AI, then fully checked and edited by the podcast host.

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