Department of Biomedical Engineering, Toyo University, Kawagoe-Shi, Saitama, Japan; Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan.
Department of Biomedical Engineering, Toyo University, Kawagoe-Shi, Saitama, Japan.
Physiol Behav. 2021 Apr 1;232:113327. doi: 10.1016/j.physbeh.2021.113327. Epub 2021 Jan 23.
Previous studies have reported that even a single bout of dynamic exercise improves cognitive performance. However, the acute effect of the interval handgrip (HG) exercise protocol, which is effective in reducing resting blood pressure, on cognitive performance is poorly understood. Cognitive performance was assessed in 17 young healthy subjects before and after a resting control (e.g., time control) and the interval HG exercise (Exercise), which consisted of four trials of 2-min HG exercise at 25% of maximum voluntary contraction with 3-min recovery in between each trial. Mean arterial blood pressure (MAP) and middle cerebral artery blood velocity (MCA V) were measured continuously throughout the experiment. Memory recognition and executive function were assessed using memory recognition and Go/No-Go tasks, respectively. During interval HG exercise, MAP and mean MCA V increased from the resting baseline condition (both P < 0.049) and returned to the resting baseline levels during recovery after the interval HG exercise (both P = 1.000). The reaction time and performance accuracy of the memory recognition task did not change in either the time control condition or Exercise condition (P = 0.514 and P = 0.414 respectively). However, the changes in reaction time of Go/No-Go task from the baseline in Exercise condition was significantly shorter than that in time-control condition (P = 0.004) without affecting performance accuracy (P = 0.482). The results of the present study show that an acute interval HG exercise could improve the processing speed in executive function despite no post-exercise improvement in hemodynamic parameters in young healthy subjects. These findings suggest that the interval HG exercise is a useful exercise mode that can be expected to have a positive effect on the processing speed in executive function regardless of cardiovascular adaptation to exercise.
先前的研究报告表明，即使单次的动态运动也能改善认知表现。然而，间隔握力（HG）运动方案的急性效应，该方案在降低静息血压方面非常有效，但其对认知表现的影响却知之甚少。在 17 名年轻健康受试者中，在休息对照（例如时间对照）和间隔 HG 运动（Exercise）前后评估了认知表现，后者由四个 2 分钟 HG 运动试验组成，HG 运动强度为最大自主收缩的 25%，每个试验之间有 3 分钟的恢复期。在整个实验过程中，连续测量平均动脉血压（MAP）和大脑中动脉血流速度（MCA V）。使用记忆识别和 Go/No-Go 任务分别评估记忆识别和执行功能。在间隔 HG 运动期间，MAP 和平均 MCA V 从静息基线水平升高（均 P < 0.049），并在间隔 HG 运动后的恢复期间恢复到静息基线水平（均 P = 1.000）。在时间对照条件或运动条件下，记忆识别任务的反应时间和执行准确性都没有变化（分别为 P = 0.514 和 P = 0.414）。然而，与时间对照条件相比，运动条件下 Go/No-Go 任务的反应时间变化从基线显著缩短（P = 0.004），而执行准确性没有变化（P = 0.482）。本研究结果表明，急性间隔 HG 运动可以改善执行功能的处理速度，尽管年轻健康受试者的血液动力学参数在运动后没有改善。这些发现表明，间隔 HG 运动是一种有用的运动方式，可以预期无论对运动的心血管适应如何，都能对执行功能的处理速度产生积极影响。
