Hello:
There is actually no one normal heart rate for an individual.
The adult's heart rate is normally measured at about 60-80 beats per minute.
However,At rest, the SA node causes your heart to beat about 50 to 100 times each minute. During activity or excitement, your body needs more oxygen-rich blood; the heart rate rises to well over 100 beats per minute.
Through research I have acquired a few things for you to read, and I recommend you visit the following website for additional information and concern.
Please see: http://www.med.umich.edu/cvc/mchc/normbeat.htm I wish you luck, hope this helps you some, and feel free to write again if you have anything further. Take Care!