Do i have bradycardia?

hi i am a 21 year old male i stand 6'1 250lbs smoke and drink and have a resting heart rate between 54-60. i did play 4 years of high school football in which i worked out hard everyday along with 2 years of basketball. recently though ive been out of the gym and only exert myself once a week. should i be concernd about such a low heart rate or is it a result of prior years hardwork?