Related Questions

I am a 14 year old girl that does a lot of long distance running. Is a resting heart rate of 42-48 bpm too slow?

Probably not. It sounds as if you are very athletic! Teens with a good exercise tolerance often have low resting heart rates. As long as you are not dizzy, excessively tired, or feeling a lot of heart skipping it's probably normal for you. Stay running! Read more...
Bradycardia . It is slow but seen commonly in people who are involved in sports , as long as it dies not lead to any symptoms, it does not require intervention if it is only sinus bradycardia ... Read more...

I'm a 17 year old girl with a heart rate of 138 at rest with shortness of breath. It's been like this every day for two months. What should I do?

Needs evaluation. You need to see a doctor for a complete evaluation. Your primary doctor or an urgent care would be your best option for initial evaluation. There are many other questions which need to be answered about your symptoms. Please see a doctor. Read more...
Physical exam, ECG. You should have a thorough exam, ECG, and basic lab work including a CBC and thyroid function. A heart rate of 138 is distinctly abnormal. Read more...