Proessl Felix, Ketelhut Nathaniel B, Rudroff Thorsten
Department of Health and Exercise Science, Colorado State University, Fort Collins.
Department of Radiology, University of Colorado School of Medicine, Aurora, Colorado, USA.
Int J Rehabil Res. 2018 Sep;41(3):267-269. doi: 10.1097/MRR.0000000000000278.
This cross-sectional study aims to determine whether leg strength asymmetries are associated with walking ability, objective measures of fatigability, or subjective perceptions of fatigue. Maximal knee extensor strength was assessed in 19 patients with multiple sclerosis (PwMS), and a symmetry index was calculated. Walking ability was determined through the total distance covered during a 6-min walk test (6MWT) and fatigability by calculating the change in distance covered between minutes 6 and 1. Perceptions of fatigue were assessed using the Fatigue Severity Scale and by obtaining ratings of perceived exertion during the first and final minute of the 6MWT. PwMS covered less distance (P=0.01) and perceived greater exertion (P<0.01) during minute 6 compared with minute 1. Knee extensor strength was asymmetric (P<0.01). The magnitude of asymmetry did not correlate with walking ability, fatigability, or measures of fatigue. Knee extensor strength asymmetry may not play an important role in prolonged walking performance in PwMS.
这项横断面研究旨在确定腿部力量不对称是否与步行能力、疲劳客观指标或疲劳主观感受相关。对19例多发性硬化症患者（PwMS）的最大伸膝力量进行评估，并计算对称指数。通过6分钟步行试验（6MWT）期间行走的总距离确定步行能力，通过计算第6分钟和第1分钟之间行走距离的变化确定疲劳程度。使用疲劳严重程度量表并通过获取6MWT第1分钟和最后1分钟的主观用力评分来评估疲劳感受。与第1分钟相比，PwMS在第6分钟行走的距离更短（P = 0.01），主观用力程度更高（P < 0.01）。伸膝力量不对称（P < 0.01）。不对称程度与步行能力、疲劳程度或疲劳指标均无相关性。伸膝力量不对称可能在PwMS患者的长时间步行表现中不起重要作用。
