Why Non-athletes Have A Higher Heart Rate Than Athletes?

Because their body is not in shape  to handle the level of activity like a trained athlete.so they are literally starving for air/oxygen so the heart pumps faster/harder to supply the blood carrying the oxygen to the rest of the body that it needs for the increased activity level that their body which is not in shape to handle the increased work load by exercising.where a trained athletes body is use to the activity level and is able to handle the increased activity .increasing the blood flow and oxygen without having to work as hard.what that big word their cardiovascular system is in better shape to handle it.