<s>[INST] Hi My heart rate is 84 bpm at rest. I go to gym 3 to 4 times a week. I hit an avg of 155 to 160 bpm when I do cardio with out any berating difficulties. I am 6'2 and 195 lbs and doesn't have any health related concerns. Is my heart rate of 84 bmp at rest normal or abnormal? Do I need to consult a doctor? [/INST] Hi,It is entirely normal. Normal rate at rest varies from 60-90. No need to consult doctor for the same. Even higher rate is fine. Normally maximum heart one achieve is calculated by formula: 120-age.Hope I have answered your query. Let me know if I can assist you further.Regards, Dr. Sagar Makode </s>