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About 70% of the energy we expend each day is what it takes to keep your lungs breathing, your heart beating, your blood flowing, your temperature at a steady level, and your ability to maintain many other basic functions of life when your body is at rest. This energy level is interchangeably called the basal metabolic rate (BMR) or the resting metabolic rate (RMR).

The larger the person (the more fat in the body), the MORE energy their body needs to keep them alive while at rest.
 
The smaller the person (the slimmer the person), the LESS energy their body needs to keep them alive while at rest.
 
Thus, as a large person becomes smaller (as a heavy person becomes slimmer), their resting metabolic rate MUST readjust every now and then to accommodate the fact that their body now needs LESS energy to keep them alive while at rest.
 
For a more detailed reference sheet on RMR 👉 https://weightnomoredietcenter.com/resting-metabolic-rate/
 
If you know your BMR, you know the least number of calories you need to keep your body functioning, and the Harris Benedict Equation is considered the gold standard formula for figuring that out. 👇

How to Measure Your Metabolic Rate
👉 https://www.omnicalculator.com/health/bmr-harris-benedict-equation