Graduate School of Human-Environment Studies, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan.
J Physiol Anthropol. 2012 Jun 25;31(1):17. doi: 10.1186/1880-6805-31-17.
To investigate the effect of preceding acute exercise on the peripheral vascular response to a mental task, we measured splanchnic and cerebral blood flow responses to performing a mental task after exercise and resting.
In the exercise trial, 11 males exercised for 30 min on a cycle ergometer with a workload set at 70% of the age-predicted maximal heart rate for each individual. After a 15-min recovery period, the subjects rested for 5 min for pre-task baseline measurement and then performed mental arithmetic for 5 min followed by 5 min of post-task measurement. In the resting trial, they rested for 45 min and pre-task baseline data was obtained for 5 min. Then mental arithmetic was performed for 5 min followed by post-task measurement. We measured the mean blood velocity in the middle cerebral artery and superior mesenteric artery and the mean arterial pressure.
Mean arterial pressure and mean blood velocity in the middle cerebral artery were significantly higher than the baseline during mental arithmetic in both exercise and resting trials. Mean blood velocity in the middle cerebral artery during mental arithmetic was greater in the control trial than the exercise trial. Mean blood velocity in the superior mesenteric artery showed no significant change during mental arithmetic from baseline in both trials.
These results suggest that acute exercise can moderate the increase in cerebral blood flow induced by a mental task.
为了研究先前的急性运动对精神任务外周血管反应的影响，我们测量了运动和休息后进行精神任务时的内脏和脑血流反应。
在运动试验中，11 名男性以 70%的个体预测最大心率为负荷，在自行车测力计上运动 30 分钟。在 15 分钟恢复期后，受试者休息 5 分钟进行任务前基线测量，然后进行 5 分钟的算术运算，然后进行 5 分钟的任务后测量。在休息试验中，他们休息 45 分钟，获得 5 分钟的任务前基线数据。然后进行 5 分钟的算术运算，然后进行 5 分钟的任务后测量。我们测量大脑中动脉和肠系膜上动脉的平均血流速度和平均动脉压。
在运动和休息试验中，算术时平均动脉压和大脑中动脉的平均血流速度均明显高于基线。在控制试验中，算术时大脑中动脉的平均血流速度大于运动试验。在两个试验中，肠系膜上动脉的平均血流速度在算术期间均未从基线显著增加。
这些结果表明，急性运动可以调节精神任务引起的脑血流增加。
