ACL tear
A rupture of the anterior cruciate ligament, usually non-contact: a hard deceleration, a pivot, or a single-leg landing where the knee collapses inward.
- Why it differs for female athletes
- Adolescent girls sustain ACL injuries at several times the rate of boys in the same sports, driven by landing and cutting mechanics, a lower hamstring-to-quadriceps ratio, and neuromuscular changes across puberty.
- Warning signs
- A pop or shift at the moment of injury, rapid swelling within hours, and a knee that feels unstable when weight-bearing.
- What lowers the risk
- A structured neuromuscular warm-up two to three times a week, all season: hamstring and hip strength, single-leg balance, coached landings, and reactive agility.
- When to see a clinician
- Any suspected ACL injury needs same-week evaluation. Do not train through instability.
