Are runners afraid of running too fast and out of the chart?

Treadmills are afraid of running too fast, but people can't stand it, and machines can't draw charts.

Heart rate is a technical term used to describe the cardiac cycle, which refers to the number of beats per minute of the heart, which is different in different States. The following is an analysis of different heart rates in different off states:

1. Resting heart rate: refers to the number of heartbeats per minute when awake and inactive. Generally, the normal range is 60- 100 times/minute. If the resting heart rate does not reach or exceed this level, it may be bradycardia or tachycardia. Many high-level runners' quiet heart rate will be lower than 60 beats/minute, which is the performance of enhanced heart function. However, the slower the heart rate, the better. Slow heart rate can easily lead to atrioventricular block. Usually, sleep heart rate