Published by PMR of NY & CT
The anterior cruciate ligament (ACL) is a strong band inside your knee that keeps the shinbone from sliding forward and twisting too far beneath the thighbone. When it tears, many athletes face surgery, months of rehab and a long road back to their sport.
Most ACL tears in sports happen without contact, during a landing, a sudden stop or a quick change of direction. That makes prevention possible: ACL prevention exercises that build strength, balance and better landing technique can lower your risk, especially when they become a regular part of training.
How a non-contact ACL injury happens
The classic pattern is a planted foot, a knee that collapses inward and a body that twists or slows down at the same moment. Landing with the knee nearly straight adds strain. Athletes often describe a pop, then quick swelling and a knee that feels unstable.
Risk is higher for athletes who:
- Play sports with jumping, cutting and pivoting, such as soccer, basketball, football, lacrosse, volleyball and skiing
- Have weak hips, hamstrings or core muscles
- Lose balance and body control as they tire
- Have torn an ACL before, on either side
- Are female, since female athletes tear their ACL at higher rates than male athletes in the same sports
Strength-focused ACL prevention exercises
Strong hips and hamstrings help keep the knee lined up over the foot. Start with body weight, aim for two or three sessions a week and add resistance only while your form stays solid.
Squat with knee control
Stand with your feet about hip-width apart. Sit your hips back and down, keeping your chest up and your knees in line with your second toes, not drifting inward. A mirror helps you check.
Single-leg Romanian deadlift
Balance on one leg with a soft knee. Hinge forward at the hips as your other leg reaches back, keeping your back flat, then stand tall again. It builds hamstring strength and balance together.
Lateral band walk
Loop a resistance band around your legs just above the knees. With knees slightly bent and toes forward, step sideways while keeping the band taut. This works the outer hip muscles that help keep the knee from caving in.
Single-leg bridge
Lie on your back with one knee bent and the other leg straight. Press through your heel to lift your hips, pause, then lower slowly.
Landing and cutting drills
Strength is only half the job. Your body also has to learn to land and change direction safely, so the right movement happens automatically in a game.
- Jump and stick: Jump up or forward, land softly on both feet with knees and hips bent, and hold for a count of two.
- Single-leg hop and hold: Hop forward on one leg and freeze on landing, knee over your foot.
- Lateral bounds: Leap side to side from one foot to the other, sticking each landing before the next.
- Controlled cuts: At a jog, plant and change direction with bent knees and your trunk over your feet, adding speed gradually.
Aim for quiet landings. A loud landing is often a sign that your knees and hips aren't bending enough.
Building a program that works
Research on neuromuscular training, programs that combine strength, balance, jumping and landing work, shows it can lower ACL injury rates, particularly among young female athletes. The benefit depends on consistency, so many teams build the routine into their warm-up all season long, not just in preseason.
Progress in steps: from two legs to one, slow to fast, and from planned movements to reacting to a coach or a ball. Having someone watch or film your landings helps you spot knees caving in. Our sports medicine and physical therapy teams can screen your movement and tailor a program to your sport.
Signs of a possible ACL tear
See a doctor promptly if you hear or feel a pop followed by swelling within a few hours, if your knee gives way or feels loose, or if you can't put weight on it. These can signal an ACL tear or another ligament or cartilage injury. Our knee pain page covers other common causes.
Call 911 for a knee that looks deformed after an injury, especially if the foot turns cold, pale or numb, since a dislocated knee can damage blood vessels.
Frequently asked questions
Can ACL prevention exercises stop every ACL tear?
No program can prevent every ACL injury. Contact injuries, such as a direct hit to the knee in a tackle, can happen no matter how well you move. Prevention training lowers the risk of non-contact tears, which make up most ACL injuries in sports, and may reduce other leg injuries too, such as ankle sprains. That makes it a worthwhile habit for athletes in jumping and cutting sports.
Why are female athletes more likely to tear their ACL?
Researchers think several factors combine, including differences in hip and knee alignment, a smaller ACL, hormonal influences and movement patterns, such as the knee collapsing inward during landing or cutting. Anatomy and hormones can't be changed, but movement patterns can be trained. That's why prevention programs are especially valuable for girls and women in jumping and cutting sports.
At what age should kids start ACL prevention exercises?
Children can learn safe jumping and landing habits as soon as they start organized sports, as long as the drills are age-appropriate and fun. Research suggests prevention programs may be especially effective when started in the teen years, around the time ACL injury rates begin to rise. Starting later can still help, including for adult athletes.
Train smarter with PMR
Athletes, parents and coaches all have a part in preventing knee injuries. Physical Medicine & Rehabilitation of NY & CT (PMR) can assess how you move, find weak links and build an ACL injury prevention plan for your sport. Request an appointment, and our team will reach out to set up an assessment in Danbury or Brewster.
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