I thought having a lower heart beat was a good thing. Besides it does not seem that abnormal...
"For resting heart rate:
* Newborn infants: 100 - 160 beats per minute
* Children 1 to 10 years: 70 - 120 beats per minute
* Children over 10 and adults (including seniors): 60 - 100 beats per minute
* Well-trained athletes: 40 - 60 beats per minute"
Found on
http://www.nlm.nih.gov/medlineplus/ency/article/003399.htm