The Basal Metabolic Rate (or BMR) is the minimal rate of energy expenditure compatible with life. In other words, it is the minimum amount of energy (expressed in number of calories) our body needs to stay alive at rest.
Your body uses energy all the time. You could be lying down, resting, doing ''nothing,'' yet every cell in your body is using energy to keep you alive. Knowing the minimum amount of calories you should consume on a daily basis will help towards any overall weight or fat loss goals you may have.