When Lindsey Vonn announced her ACL rupture and continued pursuit of competing at the Olympic Games, it reignited a conversation our profession has been having for years—but one the public is only starting to hear.
The assumption most people still carry is simple:
ACL tear = surgery.
The science tells a more nuanced story.In the ACL literature, we’ve long recognized “copers” vs “non-copers.”Copers are individuals who, despite an ACL rupture, regain:
- Full or near-full range of motion
- Strength and neuromuscular control
- Functional stability without recurrent giving-way
These athletes don’t rely on a passive stabilizer that’s no longer there. Instead, their nervous system adapts—upregulating active stabilizers (quads, hamstrings, glutes, trunk) to dynamically control the knee.If there’s no instability, surgery is not automatically required.This isn’t theoretical. This is happening—at the highest levels of sport.Our colleagues in Australia and New Zealand have led the way here. Many elite athletes in these systems delay or entirely avoid ACL reconstruction, returning to high-level competition through structured rehabilitation, neuromuscular training, and careful load progression.As someone who has lived 15+ years without an ACL, I can tell you firsthand how counterintuitive this feels to most people.I’ve:
- Run long distances
- Competed in CrossFit
- Played recreational basketball
No ACL. No instability. Just intentional training and respect for the nervous system’s role in stability.Does this mean surgery is never indicated?Of course not.
But it does mean we need to stop treating ACL reconstruction as the default rather than a decision—one based on instability, goals, sport demands, and response to rehabilitation.This is the future of rehab:
- Less reflexive intervention
- More individualized decision-making
- More trust in what high-quality physical therapy can accomplish
And stories like Lindsey Vonn’s help move that conversation forward.
Resources
Fitzgerald GK et al.
A decision-making scheme for returning patients to high-level activity with nonoperative treatment after ACL rupture.
Moksnes H, Risberg MA.
Performance-based functional evaluation of non-operative treatment after ACL injury. Scand J Med Sci Sports. 2009.
Grindem H et al.
Nonsurgical or surgical treatment of ACL injuries: 2-year outcomes. BMJ. 2016. → No superiority of early surgery over rehab-first approach.
Frobell RB et al.
Treatment for ACL tear: rehabilitation plus early surgery vs rehabilitation with optional delayed surgery. N Engl J Med. 2010 & 2013 (5-year follow-up).
Risberg MA, Moksnes H.
Return to sport after ACL injury: surgery vs nonoperative management. Sports Med. 2016.
Dr. Dan Vapne PT, DPT, OCS.
- Board Certified Orthopedic Specialist
- Co- Owner | Director of Clinical Operations & Growth
