Your surgeon did the operation. Your physio decides whether you play again. Most ACL re-tears aren't caused by bad surgery, they're caused by undercooked rehab. Here's how to pick the right ACL physio so you don't end up in the re-tear statistics.
Why the physio decision is bigger than the surgeon decision
Surgeons spend roughly 90 minutes on your knee. Your physio spends nine months on it. That's the ratio that decides your outcome. Re-tear rates after ACL reconstruction sit around 10 to 20 percent in the first two years, and the strongest predictor isn't graft type or surgical technique. It's quadriceps strength symmetry and objective return-to-sport testing at month nine. Both of those are physio outputs, not surgical ones.
So when patients ring us asking "is your clinic good for ACL rehab", we always tell them: the question is good. Ask it of every physio you interview. Below are the seven questions that separate the physios who get patients back to sport from the ones who plateau you at month four.
The 7 questions to ask any ACL physio
1. "How many ACLs do you see a year?"
Volume matters. A physio who sees two ACLs a year is learning on you. A physio who sees twenty or more has pattern-matched the timing of swelling, the quad activation tricks, the surgeon-specific protocols, and the right time to push versus pull back. There's no specific number that's "enough", but if the answer is "occasionally" or "a few", keep looking.
2. "What objective testing do you use to clear me for sport?"
The correct answer involves specific tools and benchmarks. Handheld dynamometer for quadriceps and hamstring strength. Single-leg hop tests. Y-balance. Sport-specific movement assessments. The answer you don't want: "we'll see how you feel". If the only return-to-sport criterion is calendar time and pain-free movement, you're being set up for a re-tear.
3. "Do you talk to my orthopaedic surgeon?"
Surgeon-specific protocols vary. Some surgeons want zero weight-bearing for two weeks, others want you walking on day three. Some want open-chain knee extension started at month three, others at month six. A physio who picks up the phone, sends progress reports, and adapts the plan to your specific surgeon's preferences is doing the job properly. A physio who hands you a generic protocol sheet is not.
4. "What does month four look like?"
This is the trap question. Month four is when your knee feels great. Pain is gone, range of motion is back, you can squat and lunge. Most patients want to start running, return to gym, and accelerate. A good ACL physio will tell you that month four is when you're most likely to do something stupid. The graft is at its weakest between weeks 6 and 12, and still remodelling at month six. The physio's job at month four is to hold you back and load you heavy, not let you run free.
5. "How often will I see you, and for how long?"
A serious ACL programme typically runs twice a week for the first six weeks, weekly through month three, fortnightly to month six, then return-to-sport testing sessions at months seven, eight and nine. If the answer is "come back when you feel like it" or "every six weeks", the structure isn't there.
6. "What's your gym setup like?"
Late-stage ACL rehab needs barbells, trap bars, plyometric platforms, sled work, and space to run change-of-direction drills. A treatment-room-only clinic can do the first eight weeks but can't take you to return-to-sport. Either the clinic has the gear, or it has a partnership with a gym, or it's not going to get you to the finish line.
7. "Have you rehabbed ACLs back to my sport specifically?"
An ACL coming back to recreational tennis is a different programme to one coming back to NPL football, AFL, basketball, or martial arts. Sport-specific decel and cutting drills, contact prep, and the energy system demands of your sport should all sit in the late-stage plan. Ask for examples.
The red flags
You can rule out a physio fast on the following:
- Six-month return-to-sport promises. Six months is the absolute earliest the literature ever supports, and only for specific cases. Defaulting to six months for everyone is irresponsible.
- No objective testing. "We'll know when you're ready" is not a return-to-sport criterion. The data is what tells you.
- Hands-on only. Massage and dry needling feel good but they don't rebuild a quadriceps. If the session is mostly passive, you're not progressing.
- No communication with your surgeon. If the physio doesn't even know your surgeon's name, the protocol won't be coordinated.
- Rotating physios. ACL rehab is a relationship, not a transaction. Seeing a different physio every week loses progression continuity.
What good ACL rehab actually looks like
Good ACL rehab is a structured 9-month programme split into four phases. Phase 1 (week 0 to 6) is swelling and range of motion. Phase 2 (week 6 to 12) is strength foundations. Phase 3 (month 3 to 6) is loading and early running. Phase 4 (month 6 to 9+) is return-to-sport prep with objective testing. Every phase has clear entry criteria, and you don't progress until you pass them.
The physio is communicating with your surgeon. You're seeing the same person every session. The clinic has a gym setup that can take you from quad activation to sled-pushed sprints. And by month nine, your decision to return is based on dynamometer data, not a hunch.
If a physio can't tell you what objective tests will clear you for sport, they're not your ACL physio. Keep looking.
How we do it at Rehab N Run
ACL reconstruction rehab is the patient type we've built the deepest expertise in. We run a structured 9-month programme, do handheld dynamometer testing in-clinic, coordinate directly with your orthopaedic surgeon, and discharge on objective data. You see the same physio every appointment. We've got a full gym setup. HICAPS on the spot. Same-week availability for post-op patients. If you've torn your ACL and want to talk through your specific case, book a 60-minute initial and bring your surgical notes.