Returning to Sport After ACL Injury: 5 Reasons Why Your Mental Health Matters

Returning to sport after an ACL injury is often described as a physical journey. Athletes spend months rebuilding strength, balance, range of movement, and confidence in their knee.

But imagine you've spent nine months recovering from ACL reconstruction. Your physiotherapist says your strength is back, your hop test scores look excellent, and you're medically cleared to return. Yet when you step onto the pitch, you hesitate. Why?

This is because being physically ready does not always mean an athlete feels mentally ready. At the return-to-sport stage, many athletes may still experience fear, hesitation, anxiety, or doubt. This makes the topic highly relevant to the SPRINT Project website, as sport psychology can work alongside physiotherapy and medical care to support both the athlete’s wellbeing and performance after ACL injury. This blog explores why mental health should be considered alongside physical testing when supporting athletes after ACL injury.

1. Return to Sport Is Not Only About the Knee

After ACL reconstruction, athletes are usually assessed through physical measures such as strength tests, hop tests, and movement control. These are important, but they do not show the full picture.

An athlete may pass physical tests but still feel unsure when cutting, landing, or changing direction in a real game. Research suggests that fear of re-injury, low confidence, and hesitation can affect return to sport because they may make athletes feel unsafe, avoid high-risk movements, or doubt whether their knee can cope with the demands of competition after ACL reconstruction.

This means clinicians and coaches should ask not only “Can the athlete move well?” but also “Does the athlete feel ready to trust their body again?”

Read about how mental imagery can be a game-changing tool for helping your recovery process: https://www.sprintproject.org/post/the-power-of-mental-imagery-in-injury-recovery

2. Fear of Re-Injury Can Affect Confidence

Fear of re-injury is one of the most common psychological barriers after ACL injury. This fear is understandable. The athlete may remember the exact moment of injury and feel worried that the same movement could cause another injury.

This can affect how they move. For example, an athlete may avoid sharp turns, hesitate before jumping, or play more cautiously than before. Psychological factors such as fear of movement and fear of re-injury can influence rehabilitation and return-to-sport outcomes.

3. Injury Can Affect Athletic Identity

For many athletes, sport is not just an activity. It defines who they are.

During ACL rehabilitation, athletes may lose their normal routine, team role, competition, and sense of progress. This can affect mood, motivation, and self-confidence. Even when they return to training, they may compare themselves with their pre-injury level and feel frustrated.

This is why emotional support matters during rehabilitation. Athletes may need space to talk about pressure, fear, and identity, not only exercises and test results.

4. Psychological Readiness Should Be Measured

One useful tool is the ACL-RSI scale, which stands for Anterior Cruciate Ligament Return to Sport after Injury scale.

It measures:

• Emotions: How the athlete feels about their knee, including feelings of frustration or nervousness.

• Confidence in performance: The athlete’s belief in their physical abilities and performance levels when playing.

• Risk appraisal: The athlete's perception of the chances of re-injuring the knee.

Higher ACL-RSI scores suggest a more positive psychological response to returning to sport, including greater confidence and less fear of re-injury.

An important caveat to include is that the ACL-RSI is a helpful tool but not to be used in isolation. It gives a snapshot of the athlete's self-reported state and should be used as part of a larger assessment, such as objective physical testing and qualitative, open-ended questions about the athlete's lived experiences. The questionnaire answers can spark a conversation with the athlete but not a diagnostic or decision-making tool.

Therefore, this kind of tool can be used as a supplementary method to help clinicians identify athletes who may need more psychological support before returning fully to sport.

5. Support Should Be Holistic

A good return-to-sport plan should include both physical and psychological support. This could involve:

• Gradual exposure to sport-specific movements.

• Honest conversations about fear and confidence.

• Realistic goal setting.

• Support from physiotherapists, coaches, teammates, and psychologists.

• Using tools such as the ACL-RSI to monitor psychological readiness.

Level up your goal-setting with this blog post and online interactive tool: https://www.sprintproject.org/post/how-to-set-goals-for-success

Take Home Messages

For athletes:

• Feeling nervous about returning to sport is normal.

• Confidence often returns gradually rather than straight away.

• Speak up if fear or doubt is affecting your return.

For coaches:

• Medical clearance does not always mean the athlete feels ready.

• A gradual return to training can help rebuild confidence.

• Avoid putting pressure on athletes to return too quickly.

For healthcare professionals:

• Return-to-sport decisions should include psychological readiness.

• Fear of re-injury can affect performance and wellbeing.

• Sport psychology can complement physiotherapy and medical care.

If you are an athlete, coach, or healthcare professional, it may be useful to think about one question:

When we say an athlete is “ready” to return to sport, are we considering both the body and the mind?

Conclusion

Returning to sport after ACL injury is more than passing physical tests. Athletes also need confidence, trust in their body, and support with fear of re-injury.

Mental health should not be seen as separate from rehabilitation. It is part of the recovery process. By recognizing psychological readiness, practitioners can help athletes return to sport in a safer, more confident, and more person-centered way.

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Written and Infographic by Hank Zhao

Hank Zhao is an MSc Physiotherapy student at the University of Birmingham. His academic background is in Sport and Exercise Medical Sciences, with previous research experience in blood flow restriction training and perceived exertion. He is currently completing a research placement with the SPRINT Project.

References

1. Ardern, C.L. et al. (2016) ‘2016 Consensus statement on return to sport from the First World Congress in Sports Physical Therapy, Bern’, British Journal of Sports Medicine, 50(14), pp. 853-864. Available at: https://bjsm.bmj.com/content/50/14/853

2. Burland, J.P. et al. (2018) ‘Decision to return to sport after anterior cruciate ligament reconstruction, Part I: A qualitative investigation of psychosocial factors’, Journal of Athletic Training, 53(5), pp. 452-463. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6107765

3. Kotsifaki, R. et al. (2023) ‘Aspetar clinical practice guideline on rehabilitation after anterior cruciate ligament reconstruction’, British Journal of Sports Medicine, 57(9), pp. 500-514. Available at: https://bjsm.bmj.com/content/57/9/500

4. Nedder, V.J. et al. (2025) ‘Impact of psychological factors on rehabilitation after anterior cruciate ligament reconstruction: A systematic review’, Sports Health, 17(2), pp. 291-298. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11569572

5. Tranaeus, U. et al. (2024) ‘50 years of research on the psychology of sport injury: A consensus statement’, Sports Medicine, 54(7), pp. 1733-1748. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11258162

6. Webster, K.E., Feller, J.A. and Lambros, C. (2008) ‘Development and preliminary validation of a scale to measure the psychological impact of returning to sport following anterior cruciate ligament reconstruction surgery’, Physical Therapy in Sport, 9(1), pp. 9-15. Available at: https://pubmed.ncbi.nlm.nih.gov/19083699/