2.5. Experimental procedure
First, inform the subjects of the experimental procedure and obtain their informed consent. To overcome the effects of subject response, inform the subjects before the experiment begins that this experiment is designed to measure the impact of a 1-time exercise on cognitive function. Then, have the exercise group subjects wear the heart rate telemetry device. In the first experiment: the first index test is performed before exercise, recorded as Time 0, followed by 30 minutes of exercise intervention or control, and then the second index test is performed immediately after exercise, recorded as Time 30. Both groups rested in place for 30 minutes, and the third index test was performed immediately after the rest, recorded as Time 60. The first experiment ended. After a week’s interval, the second experiment was conducted; except for the intervention methods for each group being crossed over, the other procedures were the same as in the first test. Both experiments were conducted in the laboratory of the Shandong Institute of Physical Education, and the experiments were started simultaneously. The experimental environment was kept quiet, ventilated and, at a suitable temperature. The duration of a single test was approximately 1 hour.