Schneider Daniel K, Gokeler Alli, Otten Egbert, Ford Kevin R, Hewett Timothy E, Divine Jon G, Colosimo Angelo J, Heidt Robert S, Myer Gregory D
1Division of Sports Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; 2Division of Sports Medicine, The Sport Center, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; 3College of Medicine, University of Cincinnati, Cincinnati, Ohio; 4Center for Human Movement Sciences, University of Groningen, Groningen, the Netherlands; 5Department of Physical Therapy, High Point University, High Point, North Carolina; 6Departments of Orthopaedic Surgery, Physical Medicine and Rehabilitation, and Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota; 7Department of Sports Medicine, Sports Health and Performance Institute, The Ohio State University, Columbus, Ohio; 8Division of Sports Medicine, Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio; 9Wellington Orthopaedic Surgery and Sports Medicine, Mercy Health, Cincinnati, Ohio; 10Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio; and 11The Micheli Center for Sports Injury Prevention, Waltham, Massachusetts.
J Strength Cond Res. 2017 Sep;31(9):2590-2598. doi: 10.1519/JSC.0000000000001569.
Schneider, DK, Gokeler, A, Otten, E, Ford, KR, Hewett, TE, Divine, JG, Colosimo, AJ, Heidt, RS, and Myer, GD. A Novel mass-spring-damper model analysis to identify landing deficits in athletes returning to sport after anterior cruciate ligament reconstruction. J Strength Cond Res 31(9): 2590-2598, 2017-A mass-spring-damper (MSD) model may serve as an extension of biomechanical data from 3-dimensional motion analysis and epidemiological data which helps to delineate populations at risk for anterior cruciate ligament (ACL) injuries. The purpose of this study was to evaluate such a model. Thirty-six ACL reconstruction (ACLR) group subjects and 67 controls (CTRL) completed single-leg drop landing and single-leg broad jump tasks. Landing ground reaction force data were collected and analyzed with an MSD model. Medians, interquartile ranges, and limb symmetry indices (LSIs) were calculated and comparisons were made within and between groups. During a single-leg drop landing, the ACLR group had a lower spring LSI than the CTRL group (p = 0.015) and landed with decreased stiffness in the involved limb relative to the uninvolved limb (p = 0.021). The ACLR group also had an increased damping LSI relative to the CTRL group (p = 0.045). The ACLR subjects landed with increased stiffness (p = 0.006) and decreased damping (p = 0.003) in their involved limbs compared to CTRL subjects' nondominant limbs. During a single-leg forward broad jump, the ACLR group had a greater spring LSI value than the CTRL group (p = 0.045). The CTRL group also recorded decreased damping values in their nondominant limbs compared with the involved limbs of the ACLR group (p = 0.046). Athletes who have undergone ACLR display different lower-limb dynamics than healthy controls, according to an MSD model. Quadriceps dominance and leg dominance are components of ACLR athletes' landing strategies and may be identified with an MSD model and addressed during rehabilitation.
施奈德，DK，戈克勒，A，奥滕，E，福特，KR，休伊特，TE，迪瓦恩，JG，科洛西莫，AJ，海德特，RS，以及迈尔，GD。一种新型质量-弹簧-阻尼器模型分析，用于识别前交叉韧带重建后恢复运动的运动员的落地缺陷。《力量与体能研究杂志》31(9): 2590 - 2598，2017年——质量-弹簧-阻尼器（MSD）模型可作为三维运动分析生物力学数据和流行病学数据的扩展，有助于确定前交叉韧带（ACL）损伤的高危人群。本研究的目的是评估这样一个模型。36名前交叉韧带重建（ACLR）组受试者和67名对照组（CTRL）完成了单腿下蹲落地和单腿跳远任务。收集落地地面反作用力数据并用MSD模型进行分析。计算中位数、四分位间距和肢体对称指数（LSIs），并在组内和组间进行比较。在单腿下蹲落地过程中，ACLR组的弹簧LSI低于CTRL组（p = 0.015），且患侧肢体相对于未患侧肢体落地时刚度降低（p = 0.021）。ACLR组相对于CTRL组的阻尼LSI也增加（p = 0.045）。与CTRL组受试者的非优势肢体相比，ACLR组受试者患侧肢体落地时刚度增加（p = 0.006），阻尼降低（p = 0.003）。在单腿向前跳远过程中，ACLR组的弹簧LSI值大于CTRL组（p = 0.045）。与ACLR组患侧肢体相比，CTRL组非优势肢体的阻尼值也降低（p = 0.046）。根据MSD模型，接受过ACLR的运动员表现出与健康对照组不同的下肢动力学特征。股四头肌优势和腿优势是ACLR运动员落地策略的组成部分，可通过MSD模型识别并在康复过程中加以解决。
