Asymmetry in Quadriceps Rate of Force Development as a Functional Outcome Measure in TKA
Asymmetry in Quadriceps Rate of Force Development as a Functional Outcome Measure in TKA
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DOI：
10.1007/s11999-009-0978-4
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发表时间：
2010-01-01
影响因子：
4.2
通讯作者：
Munzinger, Urs
中科院分区：
文献类型：
--
作者：
Maffiuletti, Nicola A.;Bizzini, Mario;Munzinger, Urs
股四头肌力量是TKA患者功能能力的重要预测指标。然而，由于一些日常活动的特点是产生力量的时间有限，因此有人认为力量发展速度（RFD）比最大力量更能预测功能困难。因此，我们假设RFD的侧对侧不对称性大于最大力量，RFD的不对称性与主观症状和/或功能性日常生活活动有关。我们研究了31名受试者（17名女性，14名男性）在单侧骨关节炎接受TKA治疗6 +/- 1个月后。使用膝关节结局调查-日常生活活动量表（KOS-ADLS）对日常生活活动中的症状和限制进行量化。在单侧最大自主等距运动中，对不同时间（收缩开始后50 ~ 200 ms）的股四头肌最大力量和RFD进行量化。侧对侧不对称（受累侧与未受累侧）在RFD（约36%）中大于最大力量（约24%）。主观膝关节功能与所有RFD不对称变量相关，但与最大力量不对称无关。除了最大力量外，在收缩开始后的前100至200 ms的股四头肌RFD为接受TKA的个体提供了另一种功能结果测量。
Quadriceps muscle strength is an important predictor of functional abilities in patients having TKA. However, because several daily activities are characterized by a limited time to generate force, it has been suggested that rate of force development (RFD) could better predict functional difficulties than maximal strength. We therefore hypothesized the side-to-side asymmetry would be larger for RFD than for maximal strength, and RFD asymmetry relates to subjective symptoms and/or functional daily living activities. We studied 31 subjects (17 women, 14 men) 6 +/- 1 months after undergoing TKA for unilateral osteoarthritis. Symptoms and limitations during activities of daily living were quantified using the knee outcome survey-activities of daily living scale (KOS-ADLS). Quadriceps maximal strength and RFD at different times (50 to 200 ms from contraction onset) were quantified during unilateral maximal voluntary isometric actions. Side-to-side asymmetries (involved versus uninvolved side) were larger for RFD (approximately 36%) than for maximal strength (approximately 24%). Subjective knee function related to all RFD asymmetry variables, but not to maximal strength asymmetry. In addition to maximal strength, quadriceps RFD in the first 100 to 200 ms from contraction onset provides an alternative functional outcome measure for individuals undergoing TKA.