ACL injury prevention exercises for youth athletes are the most important strength work most kids never do. Female soccer, basketball, and lacrosse players are 4-6x more likely to tear an ACL than males, and youth ACL surgeries have tripled in the last 20 years. The good news is striking: structured prevention programs reduce ACL injuries by up to 50%. These six exercises form the core of what every coach should be running twice a week, year-round.

Why ACL Tears Are Surging in Youth Sports

The rise in non-contact ACL injuries among kids tracks with two trends: early sport specialization and reduced multi-sport play. According to STOP Sports Injuries (an AOSSM initiative), kids who specialize in a single sport before age 14 are significantly more likely to suffer overuse and traumatic knee injuries.

Most non-contact ACL tears happen during landing, cutting, or decelerating with poor knee alignment. Train better mechanics, and you dramatically reduce the risk. Train poorly, and a tear is a matter of when, not if.

Exercise 1-2: Landing Mechanics

The first two ACL injury prevention exercises for youth athletes train the landing pattern. Drop-jump squats: the athlete steps off a 12-inch box, lands softly with knees over toes (never collapsing inward), and immediately squats. 3 sets of 8. Single-leg landings: hop off the same box landing on one foot, holding the position for 3 seconds before the next rep.

The cue is “soft and stacked” — soft means quiet feet, stacked means knee aligned over the second toe. A coach should be able to record landings on a phone and review with the athlete weekly. Pair this work with the broader warm-up routines for youth sports practice we recommend.

Exercise 3-4: Strength Foundations

Weak hamstrings and glutes are the single biggest ACL risk factor. Nordic hamstring curls: kneeling with ankles held by a partner, the athlete leans forward as slowly as possible, catching themselves with their hands. 3 sets of 5-8 reps. Glute bridges with march: lying on the back, lift hips into a bridge, then alternate lifting one knee to the chest. 3 sets of 12 per side.

Per a summary of NIH-funded research, hamstring strength relative to quad strength is one of the strongest predictors of knee injury in young female athletes. Get the back of the leg as strong as the front and you’ve already dropped your risk significantly.

Exercise 5-6: Cutting and Deceleration

The final two exercises rehearse the movements that cause most ACL tears. 45-degree decel cuts: sprint 10 yards, plant on the outside foot, change direction at a 45-degree angle. Focus on a wide base and a knee that points the same direction as the toes. 6 reps each direction. Lateral bounds: jump sideways from one foot to the other, sticking each landing for 2 seconds before bounding back. 3 sets of 8.

These ACL injury prevention exercises for youth athletes only work when done consistently. Two sessions per week, 15-20 minutes each, year-round. Many programs run a structured warm-up like the FIFA 11+ or PEP program — both are free and well-researched.

Putting It All Together

Build prevention into the team routine, not as an extra. Run the six exercises twice a week as part of warm-up. Track which kids show poor landing mechanics and give them extra one-on-one coaching. For more on broader injury prevention, see our how to prevent youth sports injuries guide. Most coaches who adopt these protocols see ACL injuries drop dramatically over a season — and the athletes get faster and more powerful as a side benefit. Strong, well-aligned knees are an asset for life, not just sport.

Frequently Asked Questions

At what age should ACL injury prevention exercises for youth athletes start?

Around age 9-10 is when growth and movement patterns make these exercises meaningful. Younger kids benefit more from varied movement and play.

How often should we do these exercises?

Two sessions per week is the research-backed minimum. Three is even better. One session per week shows little protective effect.

Are girls really at higher ACL risk than boys?

Yes — biomechanical, hormonal, and anatomical factors combine to create 4-6x higher non-contact ACL tear rates in adolescent female athletes. Prevention work is non-negotiable.

Can these exercises be done at home?

Most can. Drop-jumps, single-leg landings, glute bridges, and lateral bounds all need only floor space. Nordic curls require a partner or a doorway anchor.

My child already had ACL surgery — are these exercises safe?

Only with clearance from their surgeon and physical therapist. Post-surgical return-to-sport requires a structured 9-12 month protocol; these exercises eventually fit into the later phases.

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