1. What are calories?
Calories are units of energy that allow our bodies to function, from breathing to bicep curls! Every cell in our bodies require energy to function in its optimal, everyday state. Without sufficient calories we are unable to nourish our body correctly which can cause our bodies to adjust to this new, lower level of sustenance, very clever!
2. What is BMR?
Basal metabolic rate (BMR) is the number of calories you burn a day as your body performs basic life sustaining function. From breathing, blood circulation, nutrient processing to cell production.
Your BMR is determined by your sex, weight, height, age, ethnicity, weight history and body composition as well as genetic factors. From these, you have control over your weight and body composition and so creating a calorie deficit allows you to actively alter your BMR.