Kamijo Keita, Nishihira Yoshiaki, Hatta Arihiro, Kaneda Takeshi, Wasaka Toshiaki, Kida Tetsuo, Kuroiwa Kazuo
Doctoral Program in Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan.
Eur J Appl Physiol. 2004 Jul;92(3):305-11. doi: 10.1007/s00421-004-1097-2. Epub 2004 Apr 9.
The influence of exercise intensity on information processing in the central nervous system was investigated using P300 and no-go P300 event-related potentials. Twelve subjects (22-33 years) performed a go/no-go reaction time task in a control condition, and again after high-, medium-, and low-intensity pedaling exercises. Compared to the control condition, P300 amplitude decreased after high-intensity pedaling exercise and increased after medium-intensity pedaling exercise. There was no change after low-intensity pedaling exercise. These results suggested that the amount of attentional resources devoted to a given task decreased after high-intensity exercise and increased after medium-intensity exercise. The findings also suggest that changes in P300 amplitude are an inverted U-shaped behavior of differences in exercise intensity. In addition, no-go P300 amplitude showed the same changes as P300 amplitude at different exercise intensities. This indicates that differences in exercise intensity influenced not only the intensity of processing the requirement for a go response, but also processing of the need for a no-go response. It is concluded that differences in exercise intensity influenced information processing in the CNS.
利用P300和失匹配负波事件相关电位，研究了运动强度对中枢神经系统信息处理的影响。12名受试者（22 - 33岁）在对照条件下执行了一个“go/不go”反应时任务，在进行高强度、中等强度和低强度蹬车运动后再次执行该任务。与对照条件相比，高强度蹬车运动后P300波幅降低，中等强度蹬车运动后P300波幅增加。低强度蹬车运动后无变化。这些结果表明，高强度运动后分配到给定任务的注意力资源量减少，中等强度运动后增加。研究结果还表明，P300波幅的变化是运动强度差异的倒U形行为。此外，失匹配负波波幅在不同运动强度下与P300波幅表现出相同的变化。这表明运动强度差异不仅影响对“go”反应需求的处理强度，还影响对“不go”反应需求的处理。得出的结论是，运动强度差异影响中枢神经系统中的信息处理。
