Harris Joshua D
Arthroscopy. 2017 Feb;33(2):326-328. doi: 10.1016/j.arthro.2016.11.015.
Patients with anterior cruciate ligament (ACL) injury had significantly less hip rotational motion (internal rotation [IR] and sum of IR and external rotation) than control subjects without ACL tears. For each hip IR increase of 10°, the odds of sustaining an ACL rupture decreased by a factor of 0.419. Although this investigation does not prove (causation) that loss of hip rotational motion causes an ACL tear, it does continue to complement the growing and evolving literature base showing an upstream or downstream association (correlation) of decreased hip motion on adjacent structures.
前交叉韧带（ACL）损伤患者的髋关节旋转运动（内旋[IR]以及IR与外旋之和）明显少于没有ACL撕裂的对照受试者。髋关节IR每增加10°，发生ACL破裂的几率就降低0.419倍。尽管这项研究并未证明髋关节旋转运动丧失会导致ACL撕裂（因果关系），但它确实继续补充了不断发展的文献基础，表明髋关节运动减少与相邻结构之间存在上游或下游关联（相关性）。
