Ober Test

The article rejects the conventional interpretation of the Ober test as primarily measuring iliotibial band length. The Ober test is interpreted as reflecting hip and pelvic structures rather than directly measuring iliotibial band length. The Ober test is not presented as uniquely special among hip extension and adduction measures. The Ober test is described as a passive side-lying test involving hip extension and adduction. Cadaver evidence is used to argue that cutting the iliotibial band did not change the Ober test. The Ober test is instead interpreted as measuring available hip extension and adduction. Hip adduction during the Ober test adds information about frontal-plane pelvic dynamics. Posterior hip structures may influence the adduction component of the Ober test. The test is valued as a passive comparator for whether a targeted motion changed after intervention. When Ober test limitations appear in extension and adduction, interventions should target hip extension and hip adduction.