For instance , my grandfather suffered a heart attack , and he also had cancer when he was about the age of 50 .
I am doing this because I run about 40 to 60 miles per week , and my family has a history of health problems .
My grandfather suffered a heart attack , and he also had cancer when he was about the age of 50 .
I am doing this because I run about 40 to 60 miles per week , and my family has a history of health problems .