Hagen Marco, Lahner Matthias, Winhuysen Martin, Maiwald Christian
Biomechanics Laboratory, Institute of Sport and Movement Sciences, University of Duisburg-Essen, Gladbeckerstraße 182, Essen, 45141 Germany.
Clinics for Orthopaedic and Trauma Surgery, University Hospital St. Joseph, Ruhr-University Bochum, Gudrunstraße 56, Bochum, 44791 Germany.
J Foot Ankle Res. 2015 Apr 17;8:15. doi: 10.1186/s13047-015-0075-8. eCollection 2015.
Due to the specific anatomy of the subtalar joint with its oblique axis, isometric pronator and supinator strength is not well documented. The purpose of this study was to determine intra- and between-session reliability of pronator and supinator strength and lower leg muscle activity measurements during maximum voluntary isometric contractions (MVIC).
Pronator and supinator peak torques (PT), with and without supplementary visual muscle strength biofeedback (FB), and muscular activities of peroneus longus (PL) and tibialis anterior (TA) were assessed twice 3 days apart by the same examiner in 21 healthy young male adults (mean age: 27.6 years; SD = 3.9). Limits of agreement (LoA) and minimum detectable change (MDC) were evaluated.
By applying FB, reliability of both pronator and supinator PT was improved: LoA were reduced from 32% to 26% and from 20% to 18% and MDC from 20% to 15% and from 16% to 12% in supinator and pronator PT, respectively. Learning effects in pronator and supinator PT (p < 0.05), which were present without FB, were eliminated using FB. Except for TA during pronation, muscle activities showed low reliability indicated by LoA of 51% to 79%.
Using supplementary biofeedback, isometric subtalar pronator and supinator strength testing is reliable in healthy subjects. LoA of 18% and 26% have to be exceeded for pronator and supinator PT, respectively, to detect relevant effects in repeated measures.
由于距下关节具有斜轴的特殊解剖结构，等长旋前肌和旋后肌力量的相关记录并不完善。本研究的目的是确定最大自主等长收缩（MVIC）期间旋前肌和旋后肌力量以及小腿肌肉活动测量的组内和组间可靠性。
由同一名检查者对21名健康年轻男性成年人（平均年龄：27.6岁；标准差=3.9）进行两次评估，间隔3天，分别测量有和没有辅助视觉肌肉力量生物反馈（FB）时的旋前肌和旋后肌峰值扭矩（PT），以及腓骨长肌（PL）和胫骨前肌（TA）的肌肉活动。评估一致性界限（LoA）和最小可检测变化（MDC）。
通过应用FB，旋前肌和旋后肌PT的可靠性均得到提高：旋后肌和旋前肌PT的LoA分别从32%降至26%和从20%降至18%，MDC分别从20%降至15%和从16%降至12%。使用FB消除了旋前肌和旋后肌PT中无FB时存在的学习效应（p<0.05）。除旋前时的TA外，肌肉活动的可靠性较低，LoA为51%至79%。
使用辅助生物反馈，健康受试者的距下等长旋前肌和旋后肌力量测试是可靠的。在重复测量中，旋前肌和旋后肌PT分别必须超过18%和26%的LoA才能检测到相关效应。
