Respuesta :
You can calculate your maximum heart rate by subtracting your age from 220. It is important to monitor your heart rate while exercising to ensure your heart health. If it gets up too high or close to you maximum heart rate it is dangerous and unhealthy.
Answer:
You find your pulse.
Explanation:
it is important because if your heart is going slow then you can call a doctor or something. If it is fast then you have been working and gaining speed to get your heart pumping.