From mental power to muscle power - gaining strength by using the mind
From mental power to muscle power - gaining strength by using the mind
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DOI：
10.1016/j.neuropsychologia.2003.11.018
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发表时间：
2004-01-01
期刊：
影响因子：
2.6
通讯作者：
Yue, GH
中科院分区：
文献类型：
--
作者：
Ranganathan, VK;Siemionow, V;Yue, GH
该项目的目的是确定在日常生活中经常使用的小指外展肌和肘关节屈肌的心理训练诱导的力量增加（不进行体育锻炼），并量化调节这两个肌肉群的最大随意收缩（MVCs）的皮质信号。30名年轻、健康的志愿者参加了这项研究。第一组（N = 8）训练进行小指外展的“精神收缩”（ABD）；第二组（N = 8）进行肘关节精神收缩（ELB）屈曲；第三组（N = 8）未接受训练，但参与了所有测量，作为对照组。最后，6名志愿者进行了身体最大手指外展训练。训练持续12周（每天15分钟，每周5天）。在训练结束时，我们发现ABD组的手指外展力量增加了35% (P < 0.005)， ELB组的肘关节屈曲力量增加了13.5% （P < 0.001）。体能训练组使手指外展力量提高53% （P < 0.01）。对照组在手指外展或肘关节屈曲任务中没有明显的力量变化。训练组肌肉力量的改善伴随着脑电图衍生的皮层电位的显著增加，这一测量先前被证明与随意肌收缩的控制直接相关。我们得出的结论是，本研究采用的心理训练增强了皮层输出信号，从而使肌肉达到更高的激活水平并增加力量。(C) 2003 Elsevier Ltd.版权所有。
The purposes of this project were to determine mental training-induced strength gains (without performing physical exercises) in the little finger abductor as well as in the elbow flexor muscles, which are frequently used during daily living, and to quantify cortical signals that mediate maximal voluntary contractions (MVCs) of the two muscle groups. Thirty young, healthy volunteers participated in the study. The first group (N = 8) was trained to perform "mental contractions" of little finger abduction (ABD); the second group (N = 8) performed mental contractions of elbow (ELB) flexion; and the third group (N = 8) was not trained but participated in all measurements and served as a control group. Finally, six volunteers performed training of physical maximal finger abductions. Training lasted for 12 weeks (15 min per day, 5 days per week). At the end of training, we found that the ABD group had increased their finger abduction strength by 35% (P < 0.005) and the ELB group augmented their elbow flexion strength by 13.5% (P < 0.001). The physical training group increased the finger abduction strength by 53% (P < 0.01). The control group showed no significant changes in strength for either finger abduction or elbow flexion tasks. The improvement in muscle strength for trained groups was accompanied by significant increases in electroencephalogram-derived cortical potential, a measure previously shown to be directly related to control of voluntary muscle contractions. We conclude that the mental training employed by this study enhances the cortical output signal, which drives the muscles to a higher activation level and increases strength. (C) 2003 Elsevier Ltd. All rights reserved.