I am a 50 yr old male. I have always had a low resting heart rate but since I have been training more recently it has dropped to around 30 bpm. Although I run/swim a few times a week, I am no Lance Armstrong. Should I be concerned that my RHR is too low? Could it be a sign of a potential heart problem?
Hello, physiological heart rate in athletic population may be in late 40 s and 50 s. However, heart rate of 30 may suggest a pathology and hence should be evaluated further.  Best test is to get a 24 hour holder monitoring to look for any blocks which may result in low heart rates. Thyroid function and myocardial function should be evaluated as the cause for the same. Regards