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Study finds limited hip ROM related to non-contact ACL injury
Researchers from Japan found young athletes with a low hip range of motion were at risk for non-contact sports-related ACL injuries, according to this study.
“Results show that the [range of motion] ROM of hip rotation is a potential risk factor for non-contact ACL injury in student athletes,” the researchers wrote. “Narrow hip rotation ROM has a significant relation to increased risk of developing non-contact ACL injury.”
Investigators studied 44 cases of ACL injury that presented at the researchers’ institution from 2000 to 2008 in which patients had no known abnormalities and 123 student athletes in a control group. They found a 0.18 odds ratio increase for a 10° increase in the sum of the right and left internal hip rotations for the patients with an ACL injury, according to the abstract.
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For external rotations, the odds ratio increase seen in the ACL-injured group was 0.23.
Both groups consisted of individuals who were 13 to 17 years old.
“The difference between right and left limb values of each hip ROM in the case and control groups was small, with correlation coefficients of 0.88–0.98,” the researchers wrote. “In other words, no difference was found between unaffected and affected side values of each ROM in the case group. Therefore, we regard the limited ROM as existing before the injury.”
Disclosure: The authors have no relevant financial disclosures.