Muscle inactivation: Assessment of interpolated twitch technique
Muscle inactivation: Assessment of interpolated twitch technique
复制标题
DOI：
10.1152/jappl.1996.81.5.2267
复制
发表时间：
1996-11-01
影响因子：
3.3
通讯作者：
Perez, D
中科院分区：
文献类型：
--
作者：
Behm, DG;StPierre, DMM;Perez, D
内插抽搐技术（ITT）的有效性，可靠性和协议进行了研究与等距足底屈肌和腿部伸展收缩。通过比较各种叠加的增强诱发扭矩与次最大和最大随意收缩（MVC）扭矩或力来估计肌肉失活。使用神经和表面刺激来引出ITT是可靠的，除了在20度跖屈和腿部伸展期间使用神经刺激维持最大刺激的问题。内插的抽搐率-力的关系最好由浅双曲线描述，导致二阶多项式的MVC预测误差不显著（1.1-6.9%）。在40%MVC下的预测误差大约是超过60%MVC的两倍，导致非负重踝关节骨折后患者的MVC估计较差。当使用抽搐、双联体或五联体时，ITT灵敏度无显著差异。当用二阶多项式分析高强度收缩时，ITT有效且可靠。
The validity, reliability, and protocol for the interpolated twitch technique (ITT) were investigated with isometric plantar flexor and leg extension contractions. Estimates of muscle inactivation were attempted by comparing a variety of superimposed with potentiated evoked torques with submaximal and maximal voluntary contraction (MVC) torques or forces. The use of nerve and surface stimulation to elicit ITT was reliable, except for problems in maintaining maximal stimulation with nerve stimulation at 20 degrees plantar flexion and during leg extension. The interpolated twitch ratio-force relationship was best described by a shallow hyperbolic curve resulting in insignificant MVC prediction errors with second-order polynomials (1.1-6.9%). The prediction error under 40% MVC was approximately double that over 60% MVC, contributing to poor estimations of MVC in non-weight-bearing postimmobilized ankle fracture patients. There was no significant difference in the ITT sensitivity when twitches, doublets, or quintuplets were used. The ITT was valid and reliable when high-intensity contractions were analyzed with a second-order polynomial.