Lamontagne A, Malouin F, Richards C L, Dumas F
Department of Rehabilitation, Faculty of Medicine, Laval University, Quebec City, Canada.
Phys Ther. 1998 Sep;78(9):964-75; discussion 976-8. doi: 10.1093/ptj/78.9.964.
In this study, we compared the intertrial reliability of resistive torque measurements obtained with hand-held and isokinetic dynamometers and examined the validity of the hand-held dynamometers for the assessment of spastic hypertonia, defined as reflex- and nonreflex-induced resistance to stretch.
Nine subjects (mean age = 40.6 years) with a chronic (1-5 years) spinal cord injury participated.
The plantar flexors were stretched at 5 degrees /s (low velocity [LV]) and 180 degrees /s (high velocity [HV]) with an isokinetic dynamometer while the evaluator attempted to match these velocities with a hand-held dynamometer. Electromyographic activity of the soleus and tibialis anterior muscles as well as ankle displacements were recorded. Resistive torque and velocity, measured at -5 degrees of dorsiflexion, were averaged (n = 4).
High intraclass correlation coefficients (ICCs) were found at LV and HV for both the hand-held (ICC = .93 and .84) and isokinetic (ICC = .99 and .93) dynamometers. With the hand-held dynamometer, lower resistive torques were found at LV (0.8 N.m) and HV (1.2 N.m), whereas higher velocities were attained at HV.
The results indicate that the reproducibility of resistive torques obtained with hand-held dynamometry compares with that obtained with isokinetic dynamometry and allows testing of velocities that can be adjusted to the specific level of resistance to stretch. Electromyography confirmed the validity of hand-held dynamometry for assessing reflex and nonreflex components of SH. [Lamontagne A, Malouin F, Richards CL, Dumas F. Evaluation of reflex- and nonreflex-induced muscle resistance to stretch in adults with spinal cord injury using hand-held and isokinetic dynamometry.
在本研究中，我们比较了使用手持测力计和等速测力计获得的阻力矩测量的试验间可靠性，并检验了手持测力计用于评估痉挛性张力亢进（定义为反射性和非反射性牵张阻力）的有效性。
9名患有慢性（1 - 5年）脊髓损伤的受试者（平均年龄 = 40.6岁）参与了研究。
使用等速测力计以5度/秒（低速[LV]）和180度/秒（高速[HV]）对跖屈肌进行拉伸，同时评估者尝试用手持测力计匹配这些速度。记录比目鱼肌和胫骨前肌的肌电图活动以及踝关节位移。在背屈 - 5度时测量的阻力矩和速度取平均值（n = 4）。
手持测力计（组内相关系数[ICC] = 0.93和0.84）和等速测力计（ICC = 0.99和0.93）在低速和高速时均具有较高的组内相关系数。使用手持测力计时，在低速（0.8牛·米）和高速（1.2牛·米）时发现较低的阻力矩，而在高速时可达到更高的速度。
结果表明，手持测力法获得的阻力矩的可重复性与等速测力法相当，并且可以测试可根据特定牵张阻力水平进行调整的速度。肌电图证实了手持测力法用于评估痉挛性张力亢进的反射性和非反射性成分的有效性。[拉蒙塔涅A，马卢安F，理查兹CL，迪马斯F。使用手持和等速测力法评估脊髓损伤成人反射性和非反射性诱导的肌肉牵张阻力。
