Different things: It can be normal in a conditioned person (athlete), or it can be caused from pathology in the heart or the thyroid (hypothyroidism) gland. In your age group, the common things are: normally low heart rate due to regular exercise and possibly hypothyroidism; other causes are pretty rare.
Answered 9/25/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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