<s>[INST] Hi!  I am 51 and 115 pounds...I am 28 years old and a mother of three.  Besides my kids keeping me crazy busy, I also highly active/high paced job where I am on my feet straight for at least six hours a night.  I do high intensity workouts about five days a week consistantly.  My blood pressure has always been normal but these last few months it has been low.  My last check up it was 92/70...my doc said it was ok...but im wondering if there are maybe other things i should be watching out for.  My heart rate always seems to be fast, even when imaying down?? [/INST] Hello! Welcome and thank you for asking on Chat Doctor! I understand your concern and would explain that low blood pressure could be related to different causes: - chronic anemia- deny Chat Doctor. . I would recommend performing some tests to investigate for the possible cause: - a resting ECG (as you refer to have a fast heart rate)- blood lab tests (complete blood count, blood electrolytes, kidney and liver function tests)A head up tilt test would be necessary to exclude possible orthostatic hypotension. If all these tests result normal there is nothing to worry about. Meanwhile, I would recommend avoiding prolonged standing up position and take plenty of fluids (water, juices) to stay well HY </s>