However, a comparison of the EKG measured during rest and the EKG measured after mild exercise may indicate the changes, if any, that take place in the cycle of heart contractions due to activity.

然而，如果由于活动引起心脏收缩循环中发生任何变化，休息时测量的EKG与轻微锻炼后测量的EKG的对照却可以将它表示出来。

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NOTE: This activity requires the person whose EKG is being measured to perform mild exercise (e. g. , jogging in place) for three minutes.

注意：本实验需要将被测量心率的人先进行几分钟的锻炼（例如原地慢跑）。

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The EKG during rest will be compared to the EKG after mild exercise.

休息时的EKG将与轻微锻炼后的EKG作比较。

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