Department of Physiotherapy, School of Primary and Allied Health Care, Monash University, Building B, McMahons Road, Peninsula campus, Frankston, VIC, 3199, Australia.
School of Health and Sport Sciences, University of the Sunshine Coast, Sippy Downs, Australia.
Knee Surg Sports Traumatol Arthrosc. 2019 Feb;27(2):596-603. doi: 10.1007/s00167-018-5197-7. Epub 2018 Oct 6.
Individuals with impaired knee function after anterior cruciate ligament reconstruction (ACLR) may be at greater risk of developing knee osteoarthritis related to abnormal knee joint movement and loading. The aim of this study was to assess the association between knee biomechanics and knee laxity during hopping and clinically assessed knee function (i.e., patient-reported knee function and hop tests) following ACLR.
Sixty-six participants (23 women, mean age 28 ± 6 years, mean 18 ± 3 months following ACLR) completed a standardized single-leg hopping task. Three-dimensional movement analysis was used to assess knee flexion excursion and body weight/height normalized knee flexion moments during landing for the involved limb. Anterior-posterior knee laxity was assessed with a KT-1000 knee arthrometer. Participants then completed a patient-reported knee function questionnaire and three separate hop tests (% of uninvolved limb) and were divided into poor and satisfactory knee function groups (satisfactory: ≥85% patient-reported knee function and ≥ 85% hop test symmetry). Associations between knee function and hop biomechanics/knee laxity were assessed using logistic regression and interquartile range scaled odds ratios (OR).
Greater knee flexion excursion (OR 2.9, 95%CI 1.1-7.8), greater knee flexion moment (OR 4.9, 95%CI 1.6-14.3) and lesser knee laxity (OR 4.7, 95%CI 1.5-14.9) were significantly associated with greater odds of having satisfactory knee function (≥ 85% patient-reported knee function and ≥ 85% hop test symmetry).
Greater knee flexion excursion/moment during hop-landing and lesser knee laxity is associated with better patient-reported knee function and single-leg hop test performance following ACLR. Patients with lower levels of knee function following ACLR demonstrated hop-landing biomechanics previously associated with early patellofemoral osteoarthritis. Therefore, interventions aimed at improving hop landing biomechanics in people with poor knee function are likely required.
III, Cross-sectional study.
前交叉韧带重建（ACL）后膝关节功能受损的个体可能面临更大的风险，发展与膝关节运动和负荷异常相关的膝关节骨关节炎。本研究旨在评估 ACLR 后跳跃时膝关节生物力学与膝关节松弛度与临床评估膝关节功能（即患者报告的膝关节功能和跳跃测试）之间的关系。
66 名参与者（23 名女性，平均年龄 28±6 岁，ACL 后 18±3 个月）完成了标准化的单腿跳跃任务。使用三维运动分析评估了受累肢体的着地时膝关节屈曲伸展和体重/身高归一化的膝关节屈曲力矩。使用 KT-1000 关节测径器评估了前后向膝关节松弛度。然后，参与者完成了一份患者报告的膝关节功能问卷和三项单独的跳跃测试（未受累肢体的%），并分为膝关节功能较差和满意组（满意：≥85%的患者报告的膝关节功能和≥85%的跳跃测试对称性）。使用逻辑回归和四分位区间标化比值比（OR）评估膝关节功能与跳跃生物力学/膝关节松弛度之间的关联。
膝关节屈曲伸展更大（OR 2.9，95%CI 1.1-7.8）、膝关节屈曲力矩更大（OR 4.9，95%CI 1.6-14.3）和膝关节松弛度更小（OR 4.7，95%CI 1.5-14.9）与更好的膝关节功能（≥85%的患者报告的膝关节功能和≥85%的跳跃测试对称性）的可能性更大相关。
ACL 后跳跃着地时膝关节屈曲伸展/力矩更大和膝关节松弛度更小与患者报告的膝关节功能和单腿跳跃测试表现更好相关。ACL 后膝关节功能较低的患者表现出与早期髌股关节炎相关的跳跃着地生物力学。因此，可能需要针对膝关节功能较差的人群进行改善跳跃着地生物力学的干预。
III 级，横断面研究。
