“When can I start running?” is one of the most common questions after ACL reconstruction. My answer is usually another question: what kind of running are we trying to return you to?
For someone whose goal is recreational distance running, rebuilding steady running volume may be exactly the right progression. For an athlete returning to soccer, basketball, ultimate or another high-speed multidirectional sport, however, a long period of slow jogging should not automatically become the centerpiece of mid-stage rehabilitation.
Running is an important milestone. But the goal is not simply to prove that you can jog. The goal is to progressively prepare you for the forces, speeds, decisions and repeated high-intensity actions your sport actually requires.
Return to running should be criteria-based, not calendar-based
Time since surgery matters because healing biology matters. But reaching a particular postoperative week does not automatically mean the knee is ready to run.
Current clinical guidance recommends combining time with clinical and functional criteria. Suggested markers include full knee extension, close to full flexion, little or no swelling, sufficient quadriceps strength and the ability to tolerate repeated single-leg hopping without pain.
I use core markers like these, but I do not believe one fixed battery suits every athlete. I also draw from a wider range of tests depending on the athlete’s history, sport, graft, current deficits and what I am seeing throughout rehabilitation.
Before running, I want to see the basics
Running should not become a way of bypassing unfinished rehabilitation.
Before progressing, I want confidence that the knee is clinically settled and that the athlete has developed enough strength, control and elastic capacity for the next demand. That can include knee range and swelling, quadriceps and lower-limb strength, calf capacity, controlled single-leg loading, jumping and landing preparation, repeated low-level reactive contacts and movement quality.
The exact markers change with the individual. The important principle is that the athlete earns progression by demonstrating capacity rather than simply reaching a date on the calendar.
RUNNING IS A MILESTONE. IT IS NOT THE DESTINATION.
For a field or court athlete, the bigger question is whether rehabilitation is progressively preparing you to accelerate, decelerate, sprint, cut, react and repeat those actions.
Jogging and returning to athletic movement are not the same progression
I have no objection to steady jogging when it serves the athlete’s goals. If running itself is your sport or something you enjoy, rebuilding it progressively makes sense.
For a multidirectional athlete, though, I often prefer to place greater emphasis on drill-based running and movement progressions. These allow us to deconstruct athletic actions and progressively expose the athlete to positions, rhythms and forces that will later underpin faster sport.
Rather than accumulating large amounts of slow running simply because it is easy to prescribe, we can use appropriate drills to develop running mechanics, stiffness and elastic qualities, acceleration positions, force application and eventually greater speed.
This does not mean going from rehabilitation straight into maximal sprinting. It means building a deliberate bridge from controlled movement to higher-intensity movement.
Why I don’t want jogging to dominate the middle of rehab
A long, generic return-to-run progression can add a substantial amount of training volume. For some athletes that volume is useful. For others it competes with the qualities they most need to restore: strength, power, reactive ability, speed and high-quality athletic movement.
If every week becomes longer bouts of low-intensity running on top of gym work and rehabilitation, the athlete can simply become tired without becoming meaningfully better prepared for the actions associated with their sport.
Most non-contact ACL injuries are not sustained during comfortable straight-line jogging. They are more commonly associated with demanding actions such as rapid deceleration, change of direction or landing. That does not make jogging bad. It means jogging alone provides limited preparation for the situations we ultimately care about.
Can drill-based movement begin before continuous running?
In many athletes, elements of athletic movement can be introduced before they are completing meaningful volumes of continuous running — provided the task is appropriate for their stage of healing and current capacity.
Early work may be relatively simple: athletic postures, marching and rhythm drills, controlled foot contacts, low-level landing tasks and rehearsed movement patterns. As the athlete demonstrates success, those tasks can progress in speed, amplitude, force and complexity.
This creates a continuum rather than a sudden transition from “rehab exercises” to “sports training.”
The coach’s eye still matters
Objective testing gives us information that observation alone cannot. But numbers do not tell the whole story.
I also want to see how the athlete moves. Are they accepting load through the reconstructed limb? Do they look comfortable during repeated contacts? Are they creating unnecessary compensations? Does movement deteriorate when speed increases? Can they reproduce a task consistently rather than simply complete one good repetition?
The combination of objective testing, clinical response and experienced movement observation is more useful to me than a single “return-to-run test.”
Physical readiness is only part of readiness
The first running and jumping progressions can also feel psychologically significant after ACL reconstruction. Some athletes are eager to move faster; others remain hesitant despite good physical testing.
That response matters. Progression should create successful exposures that build trust in the limb rather than forcing an athlete through a stage simply because the protocol says it is time.
So when can you start running?
There is no single number that answers that question for everyone. A useful decision considers healing time, symptoms, swelling and range of motion alongside objective strength, jumping and reactive capacity, movement quality and psychological readiness.
And for athletes returning to high-speed sport, I would broaden the question:
When are you ready to start rebuilding athletic movement — and what progression will best prepare you for the sport you actually want to return to?
That is a much more useful rehabilitation question than simply asking when you are allowed to jog.
MEASURE → MOVE → PERFORM
DON’T JUST RETURN TO RUNNING. BUILD TOWARD THE WAY YOUR SPORT MOVES.
If you are unsure whether you are ready to begin running or want a progression that better reflects the demands of your sport, an ACL assessment can help identify the right next step.
Key research
- Aspetar. Clinical practice guideline on rehabilitation after anterior cruciate ligament reconstruction. Br J Sports Med. 2023.
- Rambaud AJM, Ardern CL, Thoreux P, Regnaux JP, Edouard P. Criteria for return to running after anterior cruciate ligament reconstruction: a scoping review. Br J Sports Med. 2018.
- Burgi CR, et al. Which criteria are used to clear patients to return to sport after primary ACL reconstruction? A scoping review. Br J Sports Med. 2019.
