What is BMR?
Your BMR is your "Basal Metabolic Rate". This means how many calories your body needs every day to perform basic functions to live (i.e Calories for your brain to think, calories for your heart to beat, and calories for your lungs to expand for air). It's important to know this because any form of extra physical exertion put out by your body, will need to replenished with calories (good ones of course) to maintain this number so everything can work in good order.