This one catches people out more than almost anything else. You get a surgery date, you’re relieved, and you focus on the operation itself. Physio becomes a problem for afterwards.

But here’s the issue: good physio slots get booked up fast, and the window immediately after surgery — those first two weeks — is critical. Miss it and you’re already behind before you’ve started.

So the moment your surgery date is confirmed, your physio should be booked. Not after the op, not when you get home — before you go in. Have it lined up, dated, and ready to go the morning after surgery.

Most people think ACL recovery starts after surgery. It doesn’t. It starts the moment you’re injured.

The research is clear: people who go into surgery with a stronger quad, better range of movement, and less swelling have significantly better outcomes on the other side. Walking into the operation in good shape pays you back for months afterwards.

So as soon as you have a diagnosis, you should be working — swelling control, quad activation, getting the knee moving. Every week of prehab you do is a week you’re buying back on the other side of surgery.

YouTube is full of ACL rehab videos — and that information is genuinely valuable. But information isn’t the same as clinical assessment.

The problem with self-rehabbing is that you can’t assess yourself objectively. You can’t feel what a physio feels when they put their hands on your knee. You won’t pick up on compensations, altered movement patterns, or a quad that isn’t firing properly — until something goes wrong.

So use the videos, use the information, stay educated. But have a physio with their hands on your knee throughout. The two work together — one doesn’t replace the other.

Related to that, one of the biggest structural ACL recovery mistakes is moving through phases on a calendar rather than on criteria.

Time doesn’t heal an ACL — progress does. A knee at twelve weeks that hasn’t hit its strength markers is not ready for running, regardless of what the calendar says.

So every phase of your recovery should have clear exit criteria: strength benchmarks, range of movement targets, movement quality standards. If you haven’t hit them, you don’t move forward. It’s that simple — and it’s exactly what protects you.

This is the one I see most in clinic. Someone’s feeling good at week four, the swelling has dropped, and they push into the next phase.

But feeling better and being ready are two completely different things. If you haven’t got full range back, or there’s still significant swelling sitting in the joint, and you start loading it aggressively, you’re building on an unstable foundation.

So your progression has to be earned. Full extension. Adequate bend. A dry knee with minimal swelling. Those aren’t suggestions — they’re the ticket into the next phase

This is where it all comes back to that stat I opened with. One in four ACL reconstructions re-rupture, and the single biggest driver is going back too soon.

The pressure to return is real. Coaches want you back, you want to be back, and the knee feels fine. That’s the danger — because the graft is maturing inside the joint long after the knee feels normal. Feeling ready and being ready are not the same thing.

So return to sport has to be governed by exit criteria, not by feel and not by pressure: isokinetic strength testing, single-leg hop tests, movement assessments, and successful completion of non-contact training. Every box ticked, in order, before you go back. The nine months exists for a reason — trust the process.

So there they are — six ACL recovery mistakes, all of them avoidable, and every single one coming down to the same thing: rushing a process that has to be earned at every stage. Respect each phase, earn your way through it, and you give yourself the best possible chance of getting back to sport for good rather than going through all of this twice.

Joe Sharp
BSc (Hons) Physiotherapy