ACL Injury Prevention

Evidence-based programs and exercises that can reduce your risk of ACL injury by 50-70%. Prevention is possible—and it works.

Prevention Works

50-70%
Reduction in ACL injuries with prevention programs
2-8x
Higher risk in female athletes (addressable)
20 min
Time needed for prevention warm-up

Key Prevention Principles

How Prevention Works

ACL prevention programs target the modifiable risk factors:

  • Muscle strength: Strong hamstrings protect the ACL
  • Landing mechanics: Soft, controlled landings reduce stress
  • Cutting technique: Proper body position during direction changes
  • Neuromuscular control: Quick muscle reactions to protect the knee
  • Balance/proprioception: Knowing where your body is in space

What Makes Programs Effective

  • Consistency: 2-3 times per week throughout season
  • Progression: Exercises increase in difficulty over time
  • Specificity: Movements match sport demands
  • Quality: Proper form matters more than quantity
  • Timing: Replace traditional warm-up, not add to it

Key insight: Programs only work if done consistently. Sporadic participation provides little benefit.

Evidence-Based Prevention Programs

FIFA 11+

Best for: Soccer players (all levels), adaptable to other sports

Duration: 20 minutes, 2-3x per week

Evidence: Reduces ACL injuries by 50%+, overall injuries by 30-50%

Components:

Part 1: Running

Straight running, hip out/in, circling partner, jumping

Part 2: Strength

Planks, lateral planks, Nordic hamstrings, single-leg balance, squats, lunges

Part 3: Running

Running at 75-80% speed, bounding, cutting

Resources: Free program materials at FIFA.com

PEP Program (Prevent injury and Enhance Performance)

Best for: Female soccer players (original), adaptable to female athletes in any sport

Duration: 15-20 minutes, 2-3x per week

Evidence: 74-88% reduction in ACL injuries in female athletes

Components:

Warm-up

Jog, shuttle run, backward running

Stretching

Calf, quad, hip flexor, hamstring stretches

Strengthening

Walking lunges, single-toe raises

Plyometrics

Lateral hops, forward hops, single-leg hops

Agility

Shuttle runs, diagonal runs, bounding

Sportsmetrics

Best for: Athletes in jumping sports (volleyball, basketball)

Duration: 60-90 minutes, 2-3x per week for 6 weeks

Evidence: Reduces ACL injuries by 72-89% in female athletes

Comprehensive program focusing on plyometrics, strength, and flexibility. Often administered by certified professionals.

Key Prevention Exercises

Hamstring Strengthening

Strong hamstrings are the ACL's best friend—they resist anterior tibial translation.

  • Nordic Hamstring Curls: Partner-assisted eccentric exercise (gold standard)
  • Romanian Deadlifts: Hip hinge pattern
  • Hamstring Curls: Machine or stability ball
  • Glute Bridges: Progress to single-leg

Hip & Glute Strengthening

Hip control prevents knee valgus collapse.

  • Lateral Band Walks: Glute med activation
  • Clamshells: External rotator strengthening
  • Hip Thrusts: Glute max power
  • Single-Leg Squats: Hip-knee-ankle control

Plyometrics & Landing

Focus on proper mechanics: soft landing, knee over toes, no valgus collapse.

  • Box Jumps: Stick the landing
  • Single-Leg Hops: Control on landing
  • Broad Jumps: Horizontal power with control
  • Depth Jumps: Reactive strength

Balance & Proprioception

  • Single-Leg Stance: Eyes open, then closed
  • BOSU Ball Exercises: Unstable surface training
  • Perturbation Training: React to unexpected forces
  • Sport-Specific Balance: Catch/throw while balancing

Why Women Are at Higher Risk

Female athletes are 2-8 times more likely to tear their ACL than males in the same sports. Multiple factors contribute:

Anatomical Factors

  • Wider pelvis: Increases Q-angle, changing knee loading
  • Narrower intercondylar notch: Less room for ACL
  • Smaller ACL: Relatively weaker than males
  • Greater ligament laxity: More joint looseness

Biomechanical Factors

  • Landing posture: More upright, less knee flexion
  • Knee valgus: Greater tendency for "knock-knee"
  • Ground reaction forces: Higher relative forces

Neuromuscular Factors

  • Quad dominance: Over-reliance on quadriceps vs hamstrings
  • Ligament dominance: Relying on ligaments vs muscles for stability
  • Leg dominance: Asymmetries between limbs

The Good News

Prevention programs are especially effective for female athletes. Research shows 50-70%+ reduction in ACL injuries when prevention programs are implemented consistently. All of the modifiable risk factors can be addressed through training.

Teams that implement FIFA 11+ or PEP programs see dramatic reductions in ACL injuries.

Frequently Asked Questions

When should prevention programs be done? +

Prevention programs should replace your traditional warm-up, not be added on top. Perform them at the beginning of training sessions, 2-3 times per week throughout the entire season (preseason, in-season, and ideally off-season maintenance). Starting early and maintaining consistency is key—programs done sporadically provide little benefit.

Do I need prevention after ACL reconstruction? +

Absolutely—prevention is even more important after ACL reconstruction. Your risk of re-injury (to either knee) is elevated compared to never-injured athletes. Continue neuromuscular training exercises indefinitely as part of your regular training. Prevention programs should become a permanent part of your athletic routine.

Can I prevent ACL tears in basketball? +

Yes, while most research is on soccer, prevention principles apply to basketball. Focus on: proper landing mechanics (soft landings with knee flexion), cutting technique, hamstring and hip strengthening, and plyometric training. The FIFA 11+ and PEP programs can be adapted for basketball. Some basketball-specific programs exist as well.

At what age should prevention start? +

Prevention can start as soon as athletes begin competitive sports—modified programs exist for young athletes. ACL injury risk increases significantly during adolescence, especially for females after puberty. Starting prevention programs in early adolescence (age 10-12) before the high-risk period is ideal. Programs should be age-appropriate and supervised.

Start Prevention Today

Access exercise guides and sport-specific prevention resources.