Muscles used:
Arm/Shoulder muscles, Back muscles, and Leg muscles.
Exercise to improve:
Kettlebell or dumbbell swing
Medicine ball side pass
Kettlebell Windmill
Do have a picture of the diagram
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.
Answer:
my opinion is to change the world