Puberty. <span>While puberty involves a series of biological or physical transformations, the process can also have an effect on the psychosocial and emotional development of the adolescent. </span>
C, when you’ve sat still for a few minutes. Your resting heart rate is your heart rate when you’re not moving, so this would be the optimal time.
Answer:
The reason is because the heart requires more oxygen when exercising. Several physiological events happen to increase the blood flow and therefore oxygen flow to that muscles,including the heart.
Also the volume of blood that the heart pumps out is maintained so that the body organs receive the necessary amount of oxygen and nutrition, because if it didn't adjust the flow of blood to match activity level, you will be insufficient. Either output method will be lower than needed.
