Brund R B K, Rasmussen S, Nielsen R O, Kersting U G, Laessoe U, Voigt M
Physical Activity and Human Performance, SMI®, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
Orthopaedic Surgery Research Unit, Science and Innovation Center, Aalborg University Hospital, Aalborg, Denmark.
Scand J Med Sci Sports. 2018 Feb;28(2):473-478. doi: 10.1111/sms.12923. Epub 2017 Jun 22.
Weak hip abductors may be related with increased hip adduction and knee abduction angular movement, which may be risk factors of lower extremity injuries. As the role of eccentric hip abduction strength (EHAS) on hip adduction angular movement and knee abduction angular movement (KABD) remains unclear, the purpose of this study was to explore the association between EHAS and hip and knee angular movement. In 100 healthy male recreational runners, EHAS was quantified using an isokinetic dynamometer, while hip and knee angular movements were collected using pressure-sensitive treadmill and Codamotion active marker system. Using multiple linear regression models (n=186 legs), no relationships between EHAS and hip and knee kinematics were found. A possible reason for the lack of relationship between EHAS and hip and knee kinematics may be owing to differences in the running kinematics. Some runners with weak EHAS may compensate the weakness by leaning toward the stance limb and thereby reduces the demand on the hip abductors with the consequence of increased knee abduction moment, which may lead to an increased knee abduction angular excursion. Possible, others mechanism as the quadriceps strength and activity in the hip and thigh muscles may also be able to explain the lack of relationship that may or may not exist. Despite the inconclusive results of this study, the findings may suggest that weak hip abductor muscles may be a relevant factor to focus on in future studies.
髋外展肌无力可能与髋关节内收和膝关节外展角度运动增加有关，这可能是下肢受伤的危险因素。由于髋外展离心力量（EHAS）对髋关节内收角度运动和膝关节外展角度运动（KABD）的作用尚不清楚，本研究的目的是探讨EHAS与髋、膝关节角度运动之间的关联。在100名健康的男性业余跑步者中，使用等速测力计对EHAS进行量化，同时使用压敏跑步机和Codamotion主动标记系统收集髋、膝关节角度运动数据。使用多元线性回归模型（n = 186条腿），未发现EHAS与髋、膝关节运动学之间存在关联。EHAS与髋、膝关节运动学之间缺乏关联的一个可能原因可能是跑步运动学存在差异。一些EHAS较弱的跑步者可能通过向支撑腿倾斜来弥补这种弱点，从而减少对髋外展肌的需求，结果导致膝关节外展力矩增加，这可能会导致膝关节外展角度偏移增加。可能的情况是，其他机制，如股四头肌力量以及髋部和大腿肌肉的活动，也可能解释这种可能存在或不存在的缺乏关联的情况。尽管本研究结果尚无定论，但这些发现可能表明，髋外展肌无力可能是未来研究中需要关注的一个相关因素。
