Question

Why did your pulse rate change as you are doing the activity?

Answer 1

Answer:

because the rate of oxygen in our body will change as per the pulse of rate will be also change

Explanation:

hope it will help

Answer 2

Because our body utilises more oxygen and because of that our heart pumps blood faster. And as we know that the heart beat and pulse rate of our body is same.

Therefore, the pulse rate increases as we do any activity..

Hope this helps..