PDF(Pubmed)
Abstract：
The purpose of this work was to provide a simple method to determine reactive strength during the 6-meter timed hop test (6mTH) and evaluate its association with isokinetic peak torque in patients following anterior cruciate ligament reconstruction (ACLR). Twenty-nine ACLR patients who were at least four months from surgery were included in this analysis. Participants were brought into the laboratory on one occasion to complete functional testing. Quadriceps and hamstring isokinetic testing was completed bilaterally at 60, 180, and 300 deg∙s-1, using extension peak torque from each speed as the outcome measure. The 6mTH was completed bilaterally using a marker-based motion capture system, and reactive strength ratio (RSR) was calculated from the vertical velocity of the pelvis during the test. An adjustment in RSR was made using the velocity of the 6mTH test to account for different strategies employed across participants. Repeated measures correlations were used to determine associations among isokinetic and hop testing variables. A two-way mixed analysis of variance was used to determine differences in isokinetic and hop testing variables between operated and non-operated legs and across male and female participants. Moderate positive associations were found between RSR (and adjusted RSR) and isokinetic peak torque at all speeds (r = .527 to .577). Mean comparisons showed significant main effects for leg and sex. Patients showed significant deficits in their operated versus non-operated legs in all isokinetic and hop testing variables, yet only isokinetic peak torque and timed hop time showed significant differences across male and female groups. Preliminary results are promising but further development is needed to validate other accessible technologies available to calculate reactive strength during functional testing after ACLR. Pending these developments, the effects of movement strategies, demographics, and levels of participation on RSR can then be explored to translate this simple method to clinical environments.
摘要：
这项工作的目的是提供一种简单的方法来确定6米定时跳跃测试（6mTH）期间的反应强度，并评估其与前交叉韧带重建（ACLR）后患者的等速峰值扭矩的关联。该分析包括29名手术后至少四个月的ACLR患者。参与者有一次被带到实验室以完成功能测试。使用来自每个速度的延伸峰值扭矩作为结果度量，在60、180和300°s-1的两侧完成了股四头肌和腿筋等速运动测试。6mTH是使用基于标记的运动捕捉系统在两侧完成的，和反应强度比(RSR)由试验期间骨盆的垂直速度计算。使用6mTH测试的速度对RSR进行了调整，以说明参与者采用的不同策略。重复测量相关性用于确定等速和跳跃测试变量之间的关联。使用双向混合方差分析来确定手术和非手术腿之间以及男性和女性参与者之间的等速和跳跃测试变量的差异。在所有速度（r=.527至.577）下，RSR（和调整后的RSR）与等速峰值扭矩之间均存在中度正相关。平均比较显示了对腿部和性别的显着主要影响。在所有等速运动和跳跃测试变量中，患者的手术腿与非手术腿均显示出明显的缺陷，然而，只有等速峰值扭矩和定时跳跃时间在男性和女性群体中显示出显著差异。初步结果是有希望的，但需要进一步的发展来验证其他可利用的技术，以计算在ACLR后的功能测试中的反应强度。在这些事态发展之前，运动策略的影响，人口统计，然后可以探索RSR的参与水平，以将这种简单的方法转化为临床环境。
