Do you?: Most common reason to have slow heart rate is athlete's heart from over-training. But what do you mean by slow heart rate? As it still could be normal at your age to have 40 BPM if you are in good shape. Another caveat is: how do you know the heart rate is taken correctly? Sometimes extra beats will not show at the wrist and the count could be artificially low. If you are worried, discuss with md.
Answered 1/16/2016
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5 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
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