I m a 13 year old male with an average heart rate of about 110 per minute, that s without any strenuous activity whatsoever. My P.E/Gym class took tests to find the average heart beat and most of my class got about 60-80, on further note, my dad has a congenital heart defect and so did my grandfather (he died of a heart attack ). I don t know what the defect is but my dad was told by his doctor that he s not allowed to get fat and my grandfather was on a diet just before he died. My mother says I probably have the same thing. What do you think?