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The non-sagittal knee moment vector identifies "at risk" individuals that the knee abduction moment alone does not

Robinson, MA, Sharir, R, Rafeeuddin, R and Donnelly, C The non-sagittal knee moment vector identifies "at risk" individuals that the knee abduction moment alone does not. Sports Biomechanics. ISSN 1476-3141 (Accepted)

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Multi-planar forces and moments are known to injure the anterior cruciate ligament (ACL). In ACL injury risk studies however, the uni-planar frontal plane external knee abduction moment is frequently studied in isolation. This study aimed to determine if the frontal plane knee moment (KM-Y) could classify all individuals crossing a risk threshold compared to those classified by a multi-planar non-sagittal knee moment vector (KM-YZ). Recreationally active females completed three sports tasks - drop vertical jumps, single-leg drop vertical jumps and planned sidesteps. Peak knee abduction moments and peak non-sagittal resultant knee moments were obtained for each task and a risk threshold of the sample mean plus 1.6 standard deviations was used for classification. A sensitivity analysis of the threshold from 1-2 standard deviations was also conducted. KM-Y did not identify all participants who crossed the risk threshold as the non-sagittal moment identified unique individuals. This result was consistent across tasks and threshold sensitivities. Analysing the peak uni-planar knee abduction moment alone is therefore likely overly reductionist, as this study demonstrates that a KM-YZ threshold identifies “at risk” individuals that a KM-Y threshold does not. Multi-planar moment metrics such as KM-YZ may help facilitate the development of screening protocols across multiple tasks

Item Type: Article
Uncontrolled Keywords: 0913 Mechanical Engineering, 1106 Human Movement and Sports Sciences, 1303 Specialist Studies in Education
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: Routledge
Date Deposited: 16 Mar 2021 09:55
Last Modified: 16 Mar 2021 10:00
URI: https://researchonline.ljmu.ac.uk/id/eprint/14618

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