ACL INJURIES

ACL injuries are either managed conservatively or post-surgically, but the physio principles are the same: restore motion, rebuild quad/hamstring strength, retrain stability, then return to pivoting sports safely. Rushing this is why re-tear rates are high.

1. *Prehab phase: before surgery or for conservative management*

If surgery is planned, getting strong and mobile first gives better outcomes.

- *Swelling control*: Compression, elevation, gentle ROM. You need full extension and near-full flexion before surgery.

- *Quad activation*: Quad sets, straight leg raises, NMES if needed. Quads shut down fast post-injury.

- *Gait training*: Walk normally without a limp. Compensation now becomes a problem later.

- *Strength baseline*: Single-leg squat, leg press. The stronger you go in, the better you come out.

For conservative management, the goal is to see if your knee stays stable with strength + bracing. Some people do fine without surgery if they don’t pivot/cut.

2. *Early post-op/acute phase: 0-6 weeks*

Protect the graft, restore motion, prevent quad wasting.

- *Range of motion*: Full extension day 1 is critical. Work to 90-120° flexion by week 2-4 depending on protocol.

- *Weight bearing*: Usually weight bearing as tolerated with brace locked in extension for first 1-2 weeks.

- *Quad re-education*: Quad sets, NMES, biofeedback. Quad strength loss is the #1 issue post-ACL.

- *Hamstring/glute activation*: Bridges, hamstring isometrics. Avoid aggressive hamstring loading early if it was a hamstring graft.

3. *Strength and stability phase: 6-12 weeks*

Once you have full ROM and can walk normally:

- *Quad strengthening*: Leg press, Spanish squats, step-ups. Aim for 80% strength vs other leg by month 3.

- *Hamstring and posterior chain*: RDLs, hamstring curls, hip thrusts. Balance is key to protect the graft.

- *Proprioception*: Single-leg balance, wobble board, eyes closed. Retrain the knee’s position sense.

- *Closed kinetic chain work*: Mini squats, lunges, step-downs. Safer for early graft loading.

4. *Plyometric and running phase: 3-6 months*

Only start when you have no swelling, full ROM, and good quad control.

- *Running progression*: Walk-jog intervals, build to continuous running. Check gait for asymmetry.

- *Plyometrics*: Double-leg hops → single-leg hops → bounding. Focus on soft landings and knee alignment.

- *Agility drills*: Cutting, pivoting, deceleration at increasing speed.

- *Strength targets*: Quad/hamstring strength >90% of other leg, single-leg hop test >90% symmetry.

5. *Return-to-sport phase: 6-12 months*

This is non-negotiable. Most re-tears happen at 5-8 months when people feel “good” but aren’t ready.

- *Sport-specific drills*: Cutting, jumping, sport demands at full intensity.

- *Criteria-based clearance*: No swelling, full ROM, strength >90%, hop tests >90%, no apprehension, passes movement screen.

- *Psychological readiness*: Fear of re-injury affects mechanics. Confidence matters.

What increases re-tear risk

- Returning before 9 months

- Quad strength <80% of other leg

- Poor landing mechanics

- Not addressing hip/glute weakness

Conservative vs surgical

- *Surgery*: Young, active, pivoting sports, unstable knee. Hamstring, patellar tendon, or quadriceps graft options.

- *Conservative*: Older, low demand, stable knee, no meniscus involvement. Rehab is 3-6 months vs 9-12 months post-op.

Timeline

- Post-ACL surgery: 9-12 months minimum for pivoting sports

- Conservative management: 3-6 months to return to non-pivoting activity

*Key point*: Time alone doesn’t clear you. You need to pass strength, hop, and movement tests. 

Are you pre-op, post-op, or trying to avoid surgery? And what sport/activity are you aiming to get back to? That changes the graft choice and timeline a lot.

WhatsApp Contact.  For Our Treatment Services