ACL Rehab in Tigard, Oregon: Why We Test Instead of Counting Months | APEX PWR

APEX PWR  |  Physical Therapy Feature

ACL Rehab in Tigard, Oregon: Why We Test Instead of Counting Months

Featuring Jordan Prunty, DPT  |  Tigard, Oregon  |  Serving Beaverton, Lake Oswego, Tualatin & the Portland Metro  |  September 2026

Key Takeaways

  • The athlete in this clip is a professional basketball player in mid to late stage rehab after ACL reconstruction, training at APEX PWR in Tigard.
  • The test found a remaining deficit on the right single-leg jump. We published it anyway, because a deficit you have measured is the one you can fix.
  • Compared to one month earlier, the same athlete showed significant progress. Progress and readiness are two different questions, and testing answers both.
  • Athletes who did not meet six clinical discharge criteria before returning to sport had a four times greater risk of ACL graft rupture, 33 percent versus 10 percent (Kyritsis et al., BJSM, 2016, PMID 27215935).
  • Roughly 1 in 4 athletes under 25 who return to cutting sports after ACL reconstruction suffer a second ACL injury (Wiggins et al., AJSM, 2016, PMID 26772611).
  • Objective testing also does something the research does not measure: it gives the athlete a reason to trust the knee again.

There is a version of ACL rehab that runs on a calendar. Six weeks for this, three months for that, cleared to play at nine. It is tidy, it is easy to explain to a patient, and it has almost nothing to do with whether the knee in question is actually ready.

Here is what we do instead.

Watch

Inside Jump Testing During Mid to Late Stage ACL Rehab

A professional basketball player, mid to late stage after ACL reconstruction, on the force plates in Tigard.

Watch the Video

This is jump testing partway through a comeback. Our own Dr. Jordan Prunty, DPT, put it plainly when he shared it:

“Objective testing tells the real story. There's still a deficit on the right single-leg jump, but this athlete made significant progress compared to just one month ago. Test. Don't guess. Data should drive rehab decisions, not timelines.”

Jordan Prunty, DPT, APEX PWR

Read the middle of that quote again, because it is the part most clinics would have edited out. There is still a deficit. We put the test on the internet with the deficit in it.

That is deliberate. A deficit you have measured is a deficit you can train. The dangerous one is the deficit nobody looked for, which gets discovered in a game.

What a Force Plate Sees That an Eye Cannot

A knee eight months out from reconstruction can look normal walking down a hallway, feel fine to the athlete, pass a squat screen, and still generate noticeably less force than the other leg. Compensation is the body's whole job. It gets very good at hiding an asymmetry, especially in an athlete, because athletes are the best compensators there are.

Single-leg jump testing on force plates puts a number on what the eye is missing: how much force each limb produces, how fast it produces it, and how well it absorbs the landing. Landing is where ACLs get injured, so measuring the landing rather than only the takeoff matters.

Then we run it again a month later and compare. That comparison is what tells us whether the program is working, and it is the reason this athlete's clip shows both a remaining deficit and real progress at the same time. Both facts are true, and you only get to hold both if you tested.

The Research Behind Test, Don't Guess

This is not a philosophy we invented for social media. The return-to-sport literature is unusually direct about it.

Kyritsis and colleagues followed 158 athletes after ACL reconstruction. Those who did not meet six clinical discharge criteria before returning to sport had a four times greater risk of graft rupture. Re-rupture was 33 percent in the group that did not meet criteria, against 10 percent in the group that did. (Br J Sports Med, 2016, PMID 27215935.)

The criteria in that study included strength measures and the hamstring to quadriceps ratio. In other words, discharging someone on the basis of how far along they are in the calendar, rather than what they can produce, tripled the observed re-rupture rate.

Set that against the base rate.

Roughly 1 in 4 athletes under 25 who return to cutting and pivoting sports after ACL reconstruction go on to suffer a second ACL injury. (Wiggins et al., American Journal of Sports Medicine, 2016, PMID 26772611.)

One in four is already a hard number to look at. The point of testing throughout the process rather than only at the end is to avoid landing on the wrong side of it because nobody checked.

The Part That Does Not Show Up in a Study

There is a second thing objective testing does, and we would argue it matters nearly as much as the injury risk.

Almost every ACL patient we see arrives carrying some amount of fear. They do not usually call it that. It shows up as hesitating on a cut, favoring one leg on a landing without noticing, or asking their physical therapist some version of "is it supposed to feel like this" for the fifth time. The knee got repaired surgically. Confidence in the knee is a separate rehabilitation, and it does not resolve on its own.

Numbers help with that in a way reassurance does not. Being told you look great is pleasant and forgettable. Seeing that your surgical leg produced 8 percent less force last month and 3 percent less this month is something you can believe, because it did not come from someone trying to make you feel better. Every retest is evidence, and evidence is what rebuilds trust in a joint.

That is why our ACL rehab tests at intervals rather than once at the finish line. The athlete gets to watch the gap close.

Everything Under One Roof, Which Matters More Than It Sounds

The awkward stretch of most ACL rehabs is the handoff. Physical therapy discharges you, then you are on your own to find a coach who understands what you just went through and will not put you straight into something your knee is not ready for.

We do not have that handoff. The physical therapy team and the performance staff work in the same building, off the same test data, and the late stages of rehab look a great deal like training on purpose. Watch our footage and you often cannot tell which sessions are physical therapy and which are performance training. That is the point.

For an athlete trying to get back to a season, that continuity is the difference between returning to play and returning to performance.

ACL and Knee Rehab in the Westside Portland Metro

We are at 11105 SW Greenburg Rd in Tigard, just off Highway 217, and we see ACL, meniscus, cartilage and post-operative knee patients from across the Westside: Tigard, Beaverton, Lake Oswego, Tualatin, West Linn, Hillsboro and Southwest Portland. Most of our patients are inside a ten to twenty minute drive.

You do not need to be a professional athlete for any of this to apply. The same testing that guided the comeback in that video guides a 44-year-old skier who wants their knee back, and it works for the same reason.

Tigard Beaverton Lake Oswego Tualatin Portland West Linn Hillsboro

Frequently Asked Questions

How do you know when someone is ready to return to sport after ACL surgery?
Not by the date on the calendar. Readiness is a set of measurable criteria: strength on both limbs, the hamstring to quadriceps ratio, and symmetry between the surgical and non-surgical leg on jump and hop testing. Kyritsis and colleagues followed 158 athletes and found those who did not meet six clinical discharge criteria before returning to sport had a four times greater risk of graft rupture, 33 percent versus 10 percent (Br J Sports Med, 2016, PMID 27215935).
Why does APEX use force plates and jump testing in ACL rehab?
Because a knee can look fine, feel fine, and still be producing meaningfully less force than the other side. Single-leg jump testing quantifies how much force each limb generates, how quickly, and how well it absorbs landing. That gives us a number to progress against rather than an opinion, and it catches deficits a visual assessment misses.
How long does ACL rehab take?
It varies by person, sport, graft type and surgical details, and any clinic quoting a single number before assessing you is guessing. Time alone does not restore symmetry. Athletes commonly reach the nine or twelve month mark with a measurable deficit nobody tested for. Rehab takes as long as it takes to meet the criteria, and testing is how you find out where you are.
How common is a second ACL injury?
More common than most patients are told. Roughly 1 in 4 athletes under 25 who return to cutting and pivoting sports after ACL reconstruction suffer a second ACL injury (Wiggins et al., AJSM, 2016, PMID 26772611). How you exit rehab influences that number, which is the whole argument for objective discharge testing.
Do you treat non-athletes and knee surgeries other than ACL?
Yes. The same approach applies to meniscus repair, cartilage procedures, patellar and quad tendon issues and knee replacement rehab, and to adults who want to hike, ski, chase their kids or get through a workday without their knee dictating terms.
Where is APEX PWR located for ACL and knee rehab?
11105 SW Greenburg Rd in Tigard, Oregon, just off Highway 217. We see ACL and knee rehab patients from Tigard, Beaverton, Lake Oswego, Tualatin, West Linn, Hillsboro and Southwest Portland.

Get Tested, Not Guessed

Whether you are two weeks post-op or two years out and still not right.

Start Physical Therapy ACL Rehab at APEX
Sources: Kyritsis P, Bahr R, Landreau P, Miladi R, Witvrouw E (2016). Likelihood of ACL graft rupture: not meeting six clinical discharge criteria before return to sport is associated with a four times greater risk of rupture. British Journal of Sports Medicine, 50(15), 946-951. PMID: 27215935. Wiggins AJ, Grandhi RK, Schneider DK, Stanfield D, Webster KE, Myer GD (2016). Risk of Secondary Injury in Younger Athletes After Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis. American Journal of Sports Medicine, 44(7), 1861-1876. PMID: 26772611.

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