By how much do female athletes' risk of ACL rerupture increase within 2 years after reconstruction?

By how much do female athletes' risk of ACL rerupture increase within 2 years after reconstruction?

• A. 2x
• B. 3x
• C. 4.5x
• D. 6x

Answer: (C)

The key idea is that after ACL reconstruction, female athletes have a substantially higher risk of graft rerupture when they return to pivoting sports, especially within the first two years. Studies show this risk is about 4.5 times greater than that of male athletes or the baseline risk. This heightened vulnerability in the early return-to-sport period is thought to arise from a combination of factors: neuromuscular control patterns that produce greater knee valgus during landing and cutting, relatively weaker or slower hamstring activation to protect the graft, and potential hormonal influences on ligament properties. Because the danger period is early after surgery, rehabilitation that emphasizes proper mechanics, targeted strength—particularly of the hamstrings and gluteals—and neuromuscular training is crucial before returning to high-risk activities.

The key idea is that after ACL reconstruction, female athletes have a substantially higher risk of graft rerupture when they return to pivoting sports, especially within the first two years. Studies show this risk is about 4.5 times greater than that of male athletes or the baseline risk. This heightened vulnerability in the early return-to-sport period is thought to arise from a combination of factors: neuromuscular control patterns that produce greater knee valgus during landing and cutting, relatively weaker or slower hamstring activation to protect the graft, and potential hormonal influences on ligament properties. Because the danger period is early after surgery, rehabilitation that emphasizes proper mechanics, targeted strength—particularly of the hamstrings and gluteals—and neuromuscular training is crucial before returning to high-risk activities.