Which population is at higher risk for ACL injuries due to anatomy?

Which population is at higher risk for ACL injuries due to anatomy?

• A. Males
• B. Females
• C. Children
• D. Elderly

Answer: (B)

The question tests how knee anatomy affects ACL injury risk, and the best answer is that females are more prone. Structural differences in the female knee set up mechanics that place the ACL under greater stress during common athletic movements. A wider pelvis in females tends to increase the quadriceps angle (Q angle), which pushes the knee toward valgus alignment during landing or cutting. This valgus position, combined with tibial rotation, increases anterior shear and rotational forces on the ACL, making tears more likely. In addition, females often have a relatively narrower intercondylar notch, which can influence ACL biomechanics and injury risk. While neuromuscular control and strength differences also play a role, these anatomical factors help explain why noncontact ACL injuries occur more frequently in female athletes. Males generally have smaller Q angles and different knee geometry, which does not predispose them to the same valgus-driven ACL stress. Children and the elderly have different injury patterns and biomechanical considerations, so the heightened anatomic predisposition is most evident in females.

The question tests how knee anatomy affects ACL injury risk, and the best answer is that females are more prone. Structural differences in the female knee set up mechanics that place the ACL under greater stress during common athletic movements.

A wider pelvis in females tends to increase the quadriceps angle (Q angle), which pushes the knee toward valgus alignment during landing or cutting. This valgus position, combined with tibial rotation, increases anterior shear and rotational forces on the ACL, making tears more likely. In addition, females often have a relatively narrower intercondylar notch, which can influence ACL biomechanics and injury risk. While neuromuscular control and strength differences also play a role, these anatomical factors help explain why noncontact ACL injuries occur more frequently in female athletes.

Males generally have smaller Q angles and different knee geometry, which does not predispose them to the same valgus-driven ACL stress. Children and the elderly have different injury patterns and biomechanical considerations, so the heightened anatomic predisposition is most evident in females.