Is 42 heart beats per minute normal for me?see details plz? im not an athlete, i am 25 years old, sometimes i ride a bicicle but not that much, i usually sit all day long in front of a computer.. however im fisically fit, i don t feel sick for years now, but sometimes i can imagine and can feel inside my imagination like my heart is just exploding like the sound of fireworks, i don t know is this is somekind of a fear that i have of getting a heart attack? sometimes i think of it...... however i have measured my heart beats now, 2 times, and both gave 42 beats per minute what do you think