Ilic D B, Mirkov D, Jaric S
The Research Center, Faculty for Physical Culture, University of Belgrade, Yugoslavia.
Motor Control. 1998 Jul;2(3):221-7. doi: 10.1123/mcj.2.3.221.
Nine subjects (experimental group) were tested on rapid elbow flexion and extension movements performed in the same final position, prior to and after extensive practice of the movements. Nine additional subjects (control group) were also tested, but without any practice between the tests. Comparison of the pretest and posttest results suggested that the experimental group decreased their variable error (i.e., standard deviation of the final movement position) in both practiced (elbow flexion) and nonpracticed (elbow extension) movement. The control group, however, did not improve in either of tested movements. The experimental group demonstrated lower variable error in the nonpracticed elbow extensions than the control group, while the same difference for practiced elbow flexion movements was slightly below the significant level. The results support the importance of the final position in programming of rapid, self-terminated movements; however, they do not rule out the role of other kinetic and kinematic variables (such as movement distance).
九名受试者（实验组）在进行大量动作练习之前和之后，在相同的最终位置上进行快速肘部屈伸动作测试。另外九名受试者（对照组）也进行了测试，但两次测试之间没有任何练习。测试前和测试后结果的比较表明，实验组在练习的（肘部屈曲）和未练习的（肘部伸展）动作中均降低了其可变误差（即最终动作位置的标准差）。然而，对照组在任何一项测试动作中都没有改善。实验组在未练习的肘部伸展动作中表现出比对照组更低的可变误差，而在练习的肘部屈曲动作中，同样的差异略低于显著水平。结果支持了最终位置在快速、自我终止动作编程中的重要性；然而，它们并不排除其他动力学和运动学变量（如运动距离）的作用。
