Hello I am a 20 year old female I am 5'5 and my weight is around 140, my resting heart rate is 146-157 witch is really high I have been told I have been to the doctor for this and all that has been done is I was told to monitor it daily. I have had blood work done, they came back normal and they can't seem to figure out what is causing this I have went on vacation, I do daily stress relief activities even though I don't think I'm stressed , I have changed my diet and none of these have had any effect on my heart rate. Do you have and idea what is wrong with my heart or any suggestions?