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The average heart rate according to the Mayo Clinic website is between 60 and 100 beats per minute. As there are 1,440 minutes in a day, the average heart beats between 86,400 and 144,000 beats per day.
Added 9/20/2012 5:03:48 PM
This answer has been confirmed as correct and helpful.
Confirmed by
jeifunk [2/21/2014 3:25:49 AM]