Nurture I think is the answer
During exercise, heart rate can rise adequately from a resting rate of 60 - 80 beats per minute to a maximum rate of 200 for a young adult.
Explanation:
Regular exercise causes a reduction in Resting Heart Rate (RHR) because the heart muscle is always stronger and it is capable of pumping out more blood per heartbeat.
The body needs very little or less heartbeat to pump the same amount of blood.
The intensity of excercise exceeds 60% of person's maximum heart rate the increase in cardiac output is solely attributable to increase in heart rate.
Anything that damages a bodie is damage
Erythema toxicum
A benign, widespread, temporary rash called erythema toxicum develops on a newborn as a response to the unfamiliar surroundings. Shortly after birth, it vanishes. It's not the harlequin sign, which is when blood vessels enlarge on one side of the body, causing the skin to be red on one side and white on the other. It is not vernix caseosa, a thick, oily material that covers the skin in utero and is white and thick. The reddish-purple capillary angioma under the dermis known as nevus flammeus, or port wine stain, is not this.
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