You are sedentary if you . . .spend most of your day sittingseldom walk more than a blockhave leisure-time activities that d not require you to move from place to placehave a job that is inactivedo not take time to exercise 20 to 30 minutes at least three times per weekYour body was built to [...]

Q. Is this knowledge sufficient for me to distinguish cardiac pain from non-cardiac pain ? A. I do not suggest that you try to diagnose the cause of your chest pain or palpitations yourself. That can be dangerous. But I do want to inform you that there are chest pains arising not from the heart [...]