181: Overtime – Secondary Injury after ACL Reconstruction in Professional Soccer Players

The FIFA World Cup has begun and ACL injuries remain one of the most impactful injuries in professional soccer. While much of the discussion around ACL reconstruction focuses on graft choice, rehabilitation, and return-to-play timelines, a new study published in the American Journal of Sports Medicine highlights an often-overlooked challenge: secondary muscle injuries after athletes return to competition.In this episode of Overtime with The Sports Docs, Drs. Ashley Bassett and Catherine Logan review the newly published article, "Secondary Muscle Injuries and Performance Decline After Anterior Cruciate Ligament Reconstruction in Professional Soccer." The study examines the incidence, timing, and impact of muscle injuries following ACL reconstruction in elite soccer players and explores how these injuries affect performance, playing time, and even market value.The findings reinforce an important principle in sports medicine: return to play is not the finish line—it is only the next phase of recovery.Key Discussion PointsUnderstanding ACL Injuries in SoccerCommon mechanisms of ACL injury in soccerWhy cutting, pivoting, deceleration, and landing place soccer players at particularly high riskThe career implications of ACL injuries in professional athletesACL Reconstruction Graft OptionsBone-Patellar Tendon-Bone (BTB) autograftHamstring tendon autograftQuadriceps tendon autograftAdvantages and disadvantages of each graft choiceWhy allograft tissue is generally avoided in elite athletesModern Return-to-Play Decision MakingMoving beyond time-based return-to-play criteriaStrength testing and limb symmetryHop testing and movement analysisNeuromuscular control assessmentPsychological readiness for sportOngoing graft maturation and biologic healingStudy Review: Secondary Muscle Injuries After ACL ReconstructionThe authors evaluated professional male soccer players from Europe's top leagues who underwent ACL reconstruction between 2020 and 2023 and compared them with matched healthy controls.Key findings included:32.5% of ACL-reconstructed players sustained a secondary muscle injury within one year of return to playOnly 12.5% of matched controls experienced muscle injuriesACL-reconstructed athletes were more than twice as likely to sustain a muscle injury after returnMost Common Secondary InjuriesHamstring strains (42%)Quadriceps strains (32%)Calf injuries (16%)Adductor injuries (11%)Notably, nearly 70% of injuries occurred on the reconstructed side, suggesting persistent deficits may contribute to injury risk.The Highest-Risk WindowOne of the most important findings:Nearly 58% of all secondary muscle injuries occurred between 3 and 6 months after return to competitionThis period may represent a critical vulnerability window when athletes are increasing match exposure, training volume, and competition demands.The Importance of the 9-Month RuleThe strongest predictor of secondary muscle injury was early return to play:Athletes returning before 9 months after ACL reconstruction had nearly a fivefold increased risk of secondary muscle injuryThis study adds to the growing body of evidence supporting delayed, criteria-based return to sport rather than return based solely on time.Performance and Career ImpactPlayers who sustained secondary muscle injuries experienced:Reduced playing timeFewer minutes on the fieldDecreased participation metricsDeclines in overall performanceThe study also demonstrated significant reductions in player market value among athletes who experienced secondary injuries, highlighting the financial and career implications of incomplete recovery.Strengths and Limitations of the StudyStrengthsMatched-control designFocus on elite professional soccer playersInclusion of performance metrics and market value outcomesReal-world relevance for sports medicine clinicians and team physiciansLimitationsRetrospective study designRelatively small sample sizeNo objective rehabilitation data availableNo information on graft typeLack of strength testing, hop testing, or psychological readiness measuresNo workload or GPS tracking dataClinical TakeawaysACL recovery extends well beyond return to competition.Return to play should be viewed as a milestone, not the endpoint.The first 3–6 months after return may represent the highest-risk period for secondary injury.Continued strength training, neuromuscular training, and workload monitoring remain essential after athletes resume competition.Returning before 9 months after ACL reconstruction may substantially increase the risk of secondary muscle injury.Successful ACL recovery is not simply about returning to sport—it is about staying healthy and performing at a high level after return.Article Discussed"Secondary Muscle Injuries and Performance Decline After Anterior Cruciate Ligament Reconstruction in Professional Soccer"Published in the American Journal of Sports Medicine (AJSM), 2026.🎤 Stay Connected🎧 Listen & SubscribeIf you enjoyed this episode, be sure to subscribe, rate, and review on:Apple PodcastsSpotifyFollow us on InstagramOur Hosts:Ashley Bassett, MD & Catherine Logan, MD, MBA / www.cosportsmedicine.com www.cloganmd.comFollow us on Instagram @thesportsdocspod for the latest updates in sports medicine, injury recovery, and athlete performance.