Question regarding my bradycardia i?m 20, I haven?t been diagnosed with any chronic disease nor took any medication regarding cardiovascular diseases or other chronic diseases, I used to be very active 2 years ago but since 2 years I haven?t been active, only a bit of walking, smoker, most of the time recently i?m under high stress and i?m not sleeping well, I did a liver function, wbc count wd, lipids and other blood components tests as well as urinalysis, but everything seems just fine, so i?m wondering if this bradycardia is normal or not, a year after I stopped doing physical activities my hr was 60-70. Im not moving frequently and my diet is not very good, I mostly eat from outside, half of the time it?s fast food, I don?t drink or consume any substances, I used to smoke a lot and consume large quantities of nicotine as much as a heavy smoker but I quit only 10 days ago, took 2 shots of pfizer vac yin 2020, heart rate 48-52, but goes up if I walk fast or climb stairs, or start walking suddenly, I take vitamins supplements, I don?t consume caffeine usually but I do now because of my phys and become finals, bet those were?t the best memories I hope this is just a medical student syndrome, and I can?t thank you enough if you?ve read through all of this.