resting metabolic rate is measured by
Resting Metabolic Rate Test (RMR). The Resting Metabolic Rate test (RMR) determines the amount of energy (calories) your body is using at rest. This measurement is made by analyzing the amount of oxygen your body uses and the amount of carbon dioxide your body produces.he results of a Resting Metabolic Rate test can tell your doctor if you have an increased or decreased metabolism, and if your body primarily uses fats or carbohydrates for energy. This information can be used to determine the amount of calories you need to eat each day to maintain or lose weight.